./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-two-queue.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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:07:58,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:07:58,773 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:07:58,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:07:58,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:07:58,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:07:58,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:07:58,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:07:58,811 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:07:58,815 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:07:58,815 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:07:58,816 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:07:58,817 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:07:58,818 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:07:58,818 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:07:58,818 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:07:58,819 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:07:58,819 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:07:58,819 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:07:58,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:07:58,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:07:58,820 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:07:58,820 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:07:58,820 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:07:58,820 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:07:58,821 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:07:58,821 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:07:58,821 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:07:58,822 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:07:58,822 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:07:58,823 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:07:58,823 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:07:58,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:07:58,823 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:07:58,823 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:07:58,823 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:07:58,824 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:07:58,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:07:58,824 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:07:58,824 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:07:58,824 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:07:58,825 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:07:58,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:07:58,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-06-27 17:07:59,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:07:59,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:07:59,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:07:59,083 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:07:59,084 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:07:59,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2024-06-27 17:08:00,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:08:00,383 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:08:00,383 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2024-06-27 17:08:00,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/594ab63a5/db358d63f397474da4cb669727aefad4/FLAG0eaa5e9aa [2024-06-27 17:08:00,400 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/594ab63a5/db358d63f397474da4cb669727aefad4 [2024-06-27 17:08:00,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:08:00,403 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:08:00,403 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:08:00,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:08:00,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:08:00,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d0c46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00, skipping insertion in model container [2024-06-27 17:08:00,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,431 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:08:00,618 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c[3013,3026] [2024-06-27 17:08:00,633 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:08:00,641 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:08:00,674 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c[3013,3026] [2024-06-27 17:08:00,678 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:08:00,696 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:08:00,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00 WrapperNode [2024-06-27 17:08:00,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:08:00,698 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:08:00,698 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:08:00,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:08:00,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,751 INFO L138 Inliner]: procedures = 23, calls = 33, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 198 [2024-06-27 17:08:00,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:08:00,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:08:00,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:08:00,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:08:00,761 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,776 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,794 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 17:08:00,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,825 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:08:00,833 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:08:00,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:08:00,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:08:00,834 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (1/1) ... [2024-06-27 17:08:00,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:08:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:08:00,866 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) [2024-06-27 17:08:00,883 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 [2024-06-27 17:08:00,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:08:00,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:08:00,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:08:00,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:08:00,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:08:00,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:08:00,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:08:00,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:08:00,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:08:00,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:08:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:08:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:08:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:08:00,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:08:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:08:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:08:00,913 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:08:01,017 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:08:01,019 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:08:01,323 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:08:01,324 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:08:01,541 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:08:01,541 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 17:08:01,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:08:01 BoogieIcfgContainer [2024-06-27 17:08:01,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:08:01,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:08:01,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:08:01,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:08:01,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:08:00" (1/3) ... [2024-06-27 17:08:01,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e56c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:08:01, skipping insertion in model container [2024-06-27 17:08:01,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:08:00" (2/3) ... [2024-06-27 17:08:01,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e56c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:08:01, skipping insertion in model container [2024-06-27 17:08:01,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:08:01" (3/3) ... [2024-06-27 17:08:01,552 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-06-27 17:08:01,560 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:08:01,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:08:01,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:08:01,568 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:08:01,602 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:08:01,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2024-06-27 17:08:01,667 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-06-27 17:08:01,667 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:08:01,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-06-27 17:08:01,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2024-06-27 17:08:01,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2024-06-27 17:08:01,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:08:01,697 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f137854, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:08:01,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:08:01,709 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:08:01,710 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-06-27 17:08:01,710 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:08:01,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:01,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:01,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:01,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:01,717 INFO L85 PathProgramCache]: Analyzing trace with hash 439888984, now seen corresponding path program 1 times [2024-06-27 17:08:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:01,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406300680] [2024-06-27 17:08:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:01,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:02,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:02,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406300680] [2024-06-27 17:08:02,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406300680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:08:02,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:08:02,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:08:02,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566257033] [2024-06-27 17:08:02,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:08:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:08:02,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:08:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:08:02,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-06-27 17:08:02,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:08:02,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:02,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-06-27 17:08:02,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:02,313 INFO L124 PetriNetUnfolderBase]: 141/263 cut-off events. [2024-06-27 17:08:02,313 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-27 17:08:02,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 263 events. 141/263 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1057 event pairs, 26 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 458. Up to 181 conditions per place. [2024-06-27 17:08:02,320 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 27 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2024-06-27 17:08:02,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 155 flow [2024-06-27 17:08:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:08:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:08:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-27 17:08:02,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 17:08:02,333 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 3 states and 53 transitions. [2024-06-27 17:08:02,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 155 flow [2024-06-27 17:08:02,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 141 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:08:02,338 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 73 flow [2024-06-27 17:08:02,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-06-27 17:08:02,343 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-06-27 17:08:02,344 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 73 flow [2024-06-27 17:08:02,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:08:02,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:02,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:02,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:08:02,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:02,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:02,346 INFO L85 PathProgramCache]: Analyzing trace with hash -169688755, now seen corresponding path program 1 times [2024-06-27 17:08:02,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:02,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433031576] [2024-06-27 17:08:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:02,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:02,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:02,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433031576] [2024-06-27 17:08:02,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433031576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:08:02,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:08:02,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:08:02,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165690958] [2024-06-27 17:08:02,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:08:02,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:08:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:08:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:08:02,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-06-27 17:08:02,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-27 17:08:02,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:02,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-06-27 17:08:02,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:02,549 INFO L124 PetriNetUnfolderBase]: 105/206 cut-off events. [2024-06-27 17:08:02,549 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-27 17:08:02,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 206 events. 105/206 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 729 event pairs, 22 based on Foata normal form. 6/206 useless extension candidates. Maximal degree in co-relation 120. Up to 143 conditions per place. [2024-06-27 17:08:02,551 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 25 selfloop transitions, 2 changer transitions 2/34 dead transitions. [2024-06-27 17:08:02,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 147 flow [2024-06-27 17:08:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:08:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:08:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-27 17:08:02,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 17:08:02,553 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 73 flow. Second operand 3 states and 49 transitions. [2024-06-27 17:08:02,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 147 flow [2024-06-27 17:08:02,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:08:02,557 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 82 flow [2024-06-27 17:08:02,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2024-06-27 17:08:02,557 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-27 17:08:02,558 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 82 flow [2024-06-27 17:08:02,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-27 17:08:02,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:02,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:02,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:08:02,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:02,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1033703689, now seen corresponding path program 1 times [2024-06-27 17:08:02,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:02,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040505670] [2024-06-27 17:08:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:02,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:02,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:02,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040505670] [2024-06-27 17:08:02,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040505670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:08:02,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:08:02,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:08:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576484042] [2024-06-27 17:08:02,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:08:02,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:08:02,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:08:02,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:08:02,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-06-27 17:08:02,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-27 17:08:02,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:02,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-06-27 17:08:02,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:02,726 INFO L124 PetriNetUnfolderBase]: 80/168 cut-off events. [2024-06-27 17:08:02,726 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 17:08:02,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 168 events. 80/168 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 503 event pairs, 27 based on Foata normal form. 5/168 useless extension candidates. Maximal degree in co-relation 248. Up to 112 conditions per place. [2024-06-27 17:08:02,728 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 26 selfloop transitions, 2 changer transitions 4/37 dead transitions. [2024-06-27 17:08:02,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 37 transitions, 170 flow [2024-06-27 17:08:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:08:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:08:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-06-27 17:08:02,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 17:08:02,729 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 82 flow. Second operand 3 states and 51 transitions. [2024-06-27 17:08:02,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 37 transitions, 170 flow [2024-06-27 17:08:02,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:08:02,731 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 92 flow [2024-06-27 17:08:02,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-06-27 17:08:02,731 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2024-06-27 17:08:02,731 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 92 flow [2024-06-27 17:08:02,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-27 17:08:02,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:02,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:02,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:08:02,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:02,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:02,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1248587000, now seen corresponding path program 1 times [2024-06-27 17:08:02,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:02,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718642371] [2024-06-27 17:08:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:02,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:08:02,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:02,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718642371] [2024-06-27 17:08:02,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718642371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:08:02,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:08:02,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:08:02,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22232745] [2024-06-27 17:08:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:08:02,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:08:02,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:08:02,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:08:02,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-06-27 17:08:02,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-06-27 17:08:02,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:02,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-06-27 17:08:02,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:02,886 INFO L124 PetriNetUnfolderBase]: 95/216 cut-off events. [2024-06-27 17:08:02,886 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-06-27 17:08:02,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 216 events. 95/216 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 824 event pairs, 67 based on Foata normal form. 4/211 useless extension candidates. Maximal degree in co-relation 266. Up to 150 conditions per place. [2024-06-27 17:08:02,888 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 23 selfloop transitions, 2 changer transitions 12/42 dead transitions. [2024-06-27 17:08:02,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 42 transitions, 199 flow [2024-06-27 17:08:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:08:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:08:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-06-27 17:08:02,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-27 17:08:02,895 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 92 flow. Second operand 4 states and 62 transitions. [2024-06-27 17:08:02,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 42 transitions, 199 flow [2024-06-27 17:08:02,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:08:02,897 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 104 flow [2024-06-27 17:08:02,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-06-27 17:08:02,898 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2024-06-27 17:08:02,899 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 104 flow [2024-06-27 17:08:02,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-06-27 17:08:02,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:02,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:02,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:08:02,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:02,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash -739851490, now seen corresponding path program 1 times [2024-06-27 17:08:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:02,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827106207] [2024-06-27 17:08:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:02,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:08:02,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:02,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827106207] [2024-06-27 17:08:02,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827106207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:08:02,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:08:02,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:08:02,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125211039] [2024-06-27 17:08:02,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:08:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:08:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:08:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:08:03,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-06-27 17:08:03,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:08:03,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:03,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-06-27 17:08:03,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:03,077 INFO L124 PetriNetUnfolderBase]: 93/211 cut-off events. [2024-06-27 17:08:03,077 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-06-27 17:08:03,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 211 events. 93/211 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 769 event pairs, 66 based on Foata normal form. 7/209 useless extension candidates. Maximal degree in co-relation 476. Up to 151 conditions per place. [2024-06-27 17:08:03,078 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 24 selfloop transitions, 2 changer transitions 10/41 dead transitions. [2024-06-27 17:08:03,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 206 flow [2024-06-27 17:08:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:08:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:08:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-27 17:08:03,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 17:08:03,079 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 104 flow. Second operand 4 states and 60 transitions. [2024-06-27 17:08:03,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 206 flow [2024-06-27 17:08:03,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 198 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:08:03,081 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 112 flow [2024-06-27 17:08:03,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-06-27 17:08:03,081 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-27 17:08:03,081 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 112 flow [2024-06-27 17:08:03,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:08:03,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:03,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:03,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:08:03,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:03,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash 271940661, now seen corresponding path program 1 times [2024-06-27 17:08:03,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:03,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834873066] [2024-06-27 17:08:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:04,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:04,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834873066] [2024-06-27 17:08:04,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834873066] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:08:04,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665405204] [2024-06-27 17:08:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:04,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:04,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:08:04,442 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) [2024-06-27 17:08:04,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:08:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:04,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 17:08:04,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:08:04,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:08:05,265 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-06-27 17:08:05,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 20 [2024-06-27 17:08:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:08:05,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:08:06,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:06,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 269 [2024-06-27 17:08:06,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:06,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:08:07,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:07,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:08:07,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:07,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:08:07,211 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:08:07,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:08:07,235 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:08:07,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:08:07,275 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:08:07,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:08:07,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:07,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-06-27 17:08:07,312 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:08:07,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:08:07,325 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:08:07,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2024-06-27 17:08:07,335 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2024-06-27 17:08:07,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 1 [2024-06-27 17:08:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:08:07,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665405204] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:08:07,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:08:07,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 17:08:07,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152237057] [2024-06-27 17:08:07,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:08:07,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:08:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:08:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1491, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 17:08:07,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:08:07,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 112 flow. Second operand has 41 states, 41 states have (on average 6.560975609756097) internal successors, (269), 41 states have internal predecessors, (269), 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) [2024-06-27 17:08:07,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:07,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:08:07,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:16,861 INFO L124 PetriNetUnfolderBase]: 829/1522 cut-off events. [2024-06-27 17:08:16,862 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-06-27 17:08:16,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 1522 events. 829/1522 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7700 event pairs, 26 based on Foata normal form. 3/1327 useless extension candidates. Maximal degree in co-relation 3094. Up to 280 conditions per place. [2024-06-27 17:08:16,868 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 199 selfloop transitions, 186 changer transitions 41/429 dead transitions. [2024-06-27 17:08:16,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 429 transitions, 2111 flow [2024-06-27 17:08:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-06-27 17:08:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-06-27 17:08:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 843 transitions. [2024-06-27 17:08:16,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671602787456446 [2024-06-27 17:08:16,882 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 112 flow. Second operand 82 states and 843 transitions. [2024-06-27 17:08:16,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 429 transitions, 2111 flow [2024-06-27 17:08:16,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 429 transitions, 2091 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 17:08:16,893 INFO L231 Difference]: Finished difference. Result has 140 places, 252 transitions, 1485 flow [2024-06-27 17:08:16,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=1485, PETRI_PLACES=140, PETRI_TRANSITIONS=252} [2024-06-27 17:08:16,895 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2024-06-27 17:08:16,896 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 252 transitions, 1485 flow [2024-06-27 17:08:16,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.560975609756097) internal successors, (269), 41 states have internal predecessors, (269), 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) [2024-06-27 17:08:16,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:16,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:16,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:08:17,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 17:08:17,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:17,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:17,112 INFO L85 PathProgramCache]: Analyzing trace with hash -797727593, now seen corresponding path program 2 times [2024-06-27 17:08:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:17,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119604799] [2024-06-27 17:08:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:17,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:18,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:18,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119604799] [2024-06-27 17:08:18,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119604799] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:08:18,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513317673] [2024-06-27 17:08:18,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:08:18,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:18,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:08:18,071 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) [2024-06-27 17:08:18,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:08:18,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:08:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:08:18,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 17:08:18,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:08:18,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:08:18,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:18,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-06-27 17:08:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:18,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:08:19,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:19,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 324 [2024-06-27 17:08:19,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:19,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-06-27 17:08:20,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:20,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-06-27 17:08:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:08:20,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-06-27 17:08:20,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:20,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 77 [2024-06-27 17:08:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:20,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513317673] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:08:20,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:08:20,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 17:08:20,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379789799] [2024-06-27 17:08:20,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:08:20,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:08:20,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:20,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:08:20,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 17:08:20,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:08:20,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 252 transitions, 1485 flow. Second operand has 41 states, 41 states have (on average 6.560975609756097) internal successors, (269), 41 states have internal predecessors, (269), 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) [2024-06-27 17:08:20,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:20,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:08:20,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:31,737 INFO L124 PetriNetUnfolderBase]: 2368/4333 cut-off events. [2024-06-27 17:08:31,737 INFO L125 PetriNetUnfolderBase]: For 28208/28208 co-relation queries the response was YES. [2024-06-27 17:08:31,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18479 conditions, 4333 events. 2368/4333 cut-off events. For 28208/28208 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27815 event pairs, 111 based on Foata normal form. 32/4229 useless extension candidates. Maximal degree in co-relation 18327. Up to 906 conditions per place. [2024-06-27 17:08:31,769 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 493 selfloop transitions, 526 changer transitions 32/1054 dead transitions. [2024-06-27 17:08:31,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1054 transitions, 8616 flow [2024-06-27 17:08:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-06-27 17:08:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2024-06-27 17:08:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 986 transitions. [2024-06-27 17:08:31,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3827639751552795 [2024-06-27 17:08:31,773 INFO L175 Difference]: Start difference. First operand has 140 places, 252 transitions, 1485 flow. Second operand 92 states and 986 transitions. [2024-06-27 17:08:31,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1054 transitions, 8616 flow [2024-06-27 17:08:31,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1054 transitions, 7764 flow, removed 406 selfloop flow, removed 7 redundant places. [2024-06-27 17:08:31,880 INFO L231 Difference]: Finished difference. Result has 254 places, 677 transitions, 5303 flow [2024-06-27 17:08:31,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=5303, PETRI_PLACES=254, PETRI_TRANSITIONS=677} [2024-06-27 17:08:31,881 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 226 predicate places. [2024-06-27 17:08:31,881 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 677 transitions, 5303 flow [2024-06-27 17:08:31,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.560975609756097) internal successors, (269), 41 states have internal predecessors, (269), 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) [2024-06-27 17:08:31,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:31,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:31,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 17:08:32,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-06-27 17:08:32,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:32,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1361524947, now seen corresponding path program 3 times [2024-06-27 17:08:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:32,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115424691] [2024-06-27 17:08:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:33,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:33,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115424691] [2024-06-27 17:08:33,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115424691] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:08:33,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121572967] [2024-06-27 17:08:33,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:08:33,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:33,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:08:33,096 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) [2024-06-27 17:08:33,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:08:33,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:08:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:08:33,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 52 conjunts are in the unsatisfiable core [2024-06-27 17:08:33,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:08:33,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 17:08:33,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:08:33,302 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:08:33,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 17:08:33,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:08:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:33,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:08:35,205 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-06-27 17:08:35,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 327 treesize of output 345 [2024-06-27 17:08:35,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:35,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 240 [2024-06-27 17:08:35,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-06-27 17:08:35,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:35,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 244 [2024-06-27 17:08:37,614 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-06-27 17:08:37,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 317 treesize of output 335 [2024-06-27 17:08:37,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:37,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 221 [2024-06-27 17:08:37,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-06-27 17:08:37,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:08:37,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 215 [2024-06-27 17:08:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:40,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121572967] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:08:40,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:08:40,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 17:08:40,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391617187] [2024-06-27 17:08:40,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:08:40,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:08:40,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:08:40,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 17:08:40,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:08:40,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 677 transitions, 5303 flow. Second operand has 41 states, 41 states have (on average 6.536585365853658) internal successors, (268), 41 states have internal predecessors, (268), 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) [2024-06-27 17:08:40,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:40,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:08:40,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:00,107 INFO L124 PetriNetUnfolderBase]: 2799/5122 cut-off events. [2024-06-27 17:09:00,107 INFO L125 PetriNetUnfolderBase]: For 68604/68604 co-relation queries the response was YES. [2024-06-27 17:09:00,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26833 conditions, 5122 events. 2799/5122 cut-off events. For 68604/68604 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34276 event pairs, 149 based on Foata normal form. 13/5133 useless extension candidates. Maximal degree in co-relation 26506. Up to 2413 conditions per place. [2024-06-27 17:09:00,150 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 503 selfloop transitions, 486 changer transitions 32/1024 dead transitions. [2024-06-27 17:09:00,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1024 transitions, 10136 flow [2024-06-27 17:09:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-06-27 17:09:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-06-27 17:09:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 602 transitions. [2024-06-27 17:09:00,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37719298245614036 [2024-06-27 17:09:00,153 INFO L175 Difference]: Start difference. First operand has 254 places, 677 transitions, 5303 flow. Second operand 57 states and 602 transitions. [2024-06-27 17:09:00,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1024 transitions, 10136 flow [2024-06-27 17:09:00,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1024 transitions, 9769 flow, removed 162 selfloop flow, removed 15 redundant places. [2024-06-27 17:09:00,523 INFO L231 Difference]: Finished difference. Result has 313 places, 848 transitions, 8336 flow [2024-06-27 17:09:00,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4982, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=8336, PETRI_PLACES=313, PETRI_TRANSITIONS=848} [2024-06-27 17:09:00,524 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 285 predicate places. [2024-06-27 17:09:00,524 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 848 transitions, 8336 flow [2024-06-27 17:09:00,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.536585365853658) internal successors, (268), 41 states have internal predecessors, (268), 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) [2024-06-27 17:09:00,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:00,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:00,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 17:09:00,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:00,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:00,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash 28513393, now seen corresponding path program 4 times [2024-06-27 17:09:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:00,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081744793] [2024-06-27 17:09:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:00,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:01,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:01,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081744793] [2024-06-27 17:09:01,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081744793] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:01,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103761572] [2024-06-27 17:09:01,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:09:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:01,764 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) [2024-06-27 17:09:01,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:09:01,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:09:01,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:01,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:09:01,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:01,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:09:02,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:02,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 34 [2024-06-27 17:09:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:02,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:03,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:03,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 297 [2024-06-27 17:09:03,857 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:09:03,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2024-06-27 17:09:03,878 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:09:03,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2024-06-27 17:09:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:03,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-06-27 17:09:03,902 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 17:09:03,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2024-06-27 17:09:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-06-27 17:09:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-06-27 17:09:04,238 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 17:09:04,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2024-06-27 17:09:04,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-06-27 17:09:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-06-27 17:09:04,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-06-27 17:09:04,282 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 17:09:04,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2024-06-27 17:09:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-06-27 17:09:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-06-27 17:09:04,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-06-27 17:09:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:09:04,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-06-27 17:09:04,337 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 17:09:04,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2024-06-27 17:09:04,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:04,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 63 [2024-06-27 17:09:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103761572] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:09:04,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:09:04,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-06-27 17:09:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704527639] [2024-06-27 17:09:04,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:09:04,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-06-27 17:09:04,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-06-27 17:09:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2024-06-27 17:09:04,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:09:04,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 848 transitions, 8336 flow. Second operand has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 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) [2024-06-27 17:09:04,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:04,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:09:04,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:08,298 INFO L124 PetriNetUnfolderBase]: 3040/5572 cut-off events. [2024-06-27 17:09:08,298 INFO L125 PetriNetUnfolderBase]: For 104362/104362 co-relation queries the response was YES. [2024-06-27 17:09:08,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34068 conditions, 5572 events. 3040/5572 cut-off events. For 104362/104362 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38067 event pairs, 166 based on Foata normal form. 12/5582 useless extension candidates. Maximal degree in co-relation 33700. Up to 1886 conditions per place. [2024-06-27 17:09:08,346 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 463 selfloop transitions, 630 changer transitions 21/1117 dead transitions. [2024-06-27 17:09:08,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1117 transitions, 13219 flow [2024-06-27 17:09:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-06-27 17:09:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-06-27 17:09:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 501 transitions. [2024-06-27 17:09:08,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578571428571429 [2024-06-27 17:09:08,349 INFO L175 Difference]: Start difference. First operand has 313 places, 848 transitions, 8336 flow. Second operand 50 states and 501 transitions. [2024-06-27 17:09:08,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1117 transitions, 13219 flow [2024-06-27 17:09:09,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1117 transitions, 12916 flow, removed 116 selfloop flow, removed 19 redundant places. [2024-06-27 17:09:09,072 INFO L231 Difference]: Finished difference. Result has 356 places, 988 transitions, 12159 flow [2024-06-27 17:09:09,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8060, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=12159, PETRI_PLACES=356, PETRI_TRANSITIONS=988} [2024-06-27 17:09:09,073 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 328 predicate places. [2024-06-27 17:09:09,073 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 988 transitions, 12159 flow [2024-06-27 17:09:09,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 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) [2024-06-27 17:09:09,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:09,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:09,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:09:09,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:09,276 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:09,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:09,277 INFO L85 PathProgramCache]: Analyzing trace with hash -241604281, now seen corresponding path program 5 times [2024-06-27 17:09:09,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:09,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340602518] [2024-06-27 17:09:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:09,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:10,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340602518] [2024-06-27 17:09:10,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340602518] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889234942] [2024-06-27 17:09:10,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:09:10,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:10,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:10,364 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) [2024-06-27 17:09:10,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:09:10,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:09:10,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:10,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjunts are in the unsatisfiable core [2024-06-27 17:09:10,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:10,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 17:09:10,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:09:10,547 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:09:10,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 17:09:10,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:09:11,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2024-06-27 17:09:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:11,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:16,663 INFO L349 Elim1Store]: treesize reduction 40, result has 54.0 percent of original size [2024-06-27 17:09:16,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 326 treesize of output 336 [2024-06-27 17:09:16,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:16,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 233 [2024-06-27 17:09:16,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-06-27 17:09:16,938 INFO L349 Elim1Store]: treesize reduction 5, result has 93.2 percent of original size [2024-06-27 17:09:16,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 227 [2024-06-27 17:09:17,728 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-06-27 17:09:17,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 232 treesize of output 258 [2024-06-27 17:09:17,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:17,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 211 [2024-06-27 17:09:17,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-06-27 17:09:17,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:17,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 246 treesize of output 288 [2024-06-27 17:09:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:20,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889234942] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:09:20,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:09:20,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-06-27 17:09:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102258162] [2024-06-27 17:09:20,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:09:20,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-06-27 17:09:20,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-06-27 17:09:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1632, Unknown=1, NotChecked=0, Total=1806 [2024-06-27 17:09:20,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:09:20,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 988 transitions, 12159 flow. Second operand has 43 states, 43 states have (on average 6.465116279069767) internal successors, (278), 43 states have internal predecessors, (278), 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) [2024-06-27 17:09:20,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:20,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:09:20,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:25,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:09:28,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:10:31,932 INFO L124 PetriNetUnfolderBase]: 3600/6541 cut-off events. [2024-06-27 17:10:31,932 INFO L125 PetriNetUnfolderBase]: For 137367/137367 co-relation queries the response was YES. [2024-06-27 17:10:31,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45534 conditions, 6541 events. 3600/6541 cut-off events. For 137367/137367 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 45877 event pairs, 109 based on Foata normal form. 10/6549 useless extension candidates. Maximal degree in co-relation 45133. Up to 1703 conditions per place. [2024-06-27 17:10:31,985 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 507 selfloop transitions, 957 changer transitions 29/1496 dead transitions. [2024-06-27 17:10:31,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1496 transitions, 21186 flow [2024-06-27 17:10:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-06-27 17:10:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2024-06-27 17:10:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 914 transitions. [2024-06-27 17:10:31,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548136645962733 [2024-06-27 17:10:31,988 INFO L175 Difference]: Start difference. First operand has 356 places, 988 transitions, 12159 flow. Second operand 92 states and 914 transitions. [2024-06-27 17:10:31,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1496 transitions, 21186 flow [2024-06-27 17:10:33,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1496 transitions, 20352 flow, removed 355 selfloop flow, removed 23 redundant places. [2024-06-27 17:10:33,134 INFO L231 Difference]: Finished difference. Result has 450 places, 1246 transitions, 19029 flow [2024-06-27 17:10:33,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=11687, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=19029, PETRI_PLACES=450, PETRI_TRANSITIONS=1246} [2024-06-27 17:10:33,135 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 422 predicate places. [2024-06-27 17:10:33,136 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1246 transitions, 19029 flow [2024-06-27 17:10:33,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.465116279069767) internal successors, (278), 43 states have internal predecessors, (278), 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) [2024-06-27 17:10:33,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:33,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:33,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:33,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-06-27 17:10:33,342 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:33,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1919072113, now seen corresponding path program 6 times [2024-06-27 17:10:33,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:33,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672448598] [2024-06-27 17:10:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:33,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:37,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:37,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672448598] [2024-06-27 17:10:37,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672448598] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:37,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924477875] [2024-06-27 17:10:37,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:10:37,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:37,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:37,088 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) [2024-06-27 17:10:37,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 17:10:37,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:10:37,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:37,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 17:10:37,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:37,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 17:10:37,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:10:37,819 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:10:37,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 17:10:38,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:10:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:40,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:45,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:45,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 84 [2024-06-27 17:10:45,608 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-06-27 17:10:45,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 231 [2024-06-27 17:10:45,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:45,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 167 [2024-06-27 17:10:58,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:58,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 73 [2024-06-27 17:10:58,655 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-06-27 17:10:58,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 183 [2024-06-27 17:10:58,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:58,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 133 [2024-06-27 17:11:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:10,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924477875] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:10,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:10,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-06-27 17:11:10,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729148064] [2024-06-27 17:11:10,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:10,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-06-27 17:11:10,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-06-27 17:11:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1313, Unknown=3, NotChecked=0, Total=1482 [2024-06-27 17:11:10,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:11:10,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1246 transitions, 19029 flow. Second operand has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 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) [2024-06-27 17:11:10,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:10,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:11:10,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:29,002 INFO L124 PetriNetUnfolderBase]: 3860/7011 cut-off events. [2024-06-27 17:11:29,003 INFO L125 PetriNetUnfolderBase]: For 191965/191965 co-relation queries the response was YES. [2024-06-27 17:11:29,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55581 conditions, 7011 events. 3860/7011 cut-off events. For 191965/191965 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 49607 event pairs, 237 based on Foata normal form. 14/7025 useless extension candidates. Maximal degree in co-relation 55142. Up to 4996 conditions per place. [2024-06-27 17:11:29,213 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 967 selfloop transitions, 481 changer transitions 16/1467 dead transitions. [2024-06-27 17:11:29,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1467 transitions, 24844 flow [2024-06-27 17:11:29,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 17:11:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 17:11:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 387 transitions. [2024-06-27 17:11:29,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 17:11:29,215 INFO L175 Difference]: Start difference. First operand has 450 places, 1246 transitions, 19029 flow. Second operand 36 states and 387 transitions. [2024-06-27 17:11:29,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1467 transitions, 24844 flow [2024-06-27 17:11:31,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 1467 transitions, 23811 flow, removed 435 selfloop flow, removed 32 redundant places. [2024-06-27 17:11:31,232 INFO L231 Difference]: Finished difference. Result has 462 places, 1335 transitions, 21472 flow [2024-06-27 17:11:31,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=18101, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21472, PETRI_PLACES=462, PETRI_TRANSITIONS=1335} [2024-06-27 17:11:31,234 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 434 predicate places. [2024-06-27 17:11:31,234 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1335 transitions, 21472 flow [2024-06-27 17:11:31,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 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) [2024-06-27 17:11:31,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:31,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:31,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 17:11:31,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:31,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:31,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1255974517, now seen corresponding path program 7 times [2024-06-27 17:11:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222416753] [2024-06-27 17:11:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:31,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:35,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222416753] [2024-06-27 17:11:35,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222416753] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689998539] [2024-06-27 17:11:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:11:35,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:35,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:35,089 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) [2024-06-27 17:11:35,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 17:11:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:35,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 51 conjunts are in the unsatisfiable core [2024-06-27 17:11:35,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:35,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 17:11:35,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:11:35,871 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:11:35,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 17:11:36,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:11:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:39,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:46,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:46,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 62 [2024-06-27 17:11:46,854 INFO L349 Elim1Store]: treesize reduction 4, result has 89.7 percent of original size [2024-06-27 17:11:46,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 144 [2024-06-27 17:11:46,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:47,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 110 [2024-06-27 17:11:48,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:48,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 55 [2024-06-27 17:11:48,901 INFO L349 Elim1Store]: treesize reduction 4, result has 89.7 percent of original size [2024-06-27 17:11:48,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 104 [2024-06-27 17:11:49,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:49,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2024-06-27 17:11:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:50,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689998539] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:50,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:50,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 17:11:50,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273124114] [2024-06-27 17:11:50,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:50,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:11:50,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:11:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1455, Unknown=1, NotChecked=0, Total=1640 [2024-06-27 17:11:51,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:11:51,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1335 transitions, 21472 flow. Second operand has 41 states, 41 states have (on average 6.536585365853658) internal successors, (268), 41 states have internal predecessors, (268), 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) [2024-06-27 17:11:51,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:51,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:11:51,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:03,597 INFO L124 PetriNetUnfolderBase]: 5317/9624 cut-off events. [2024-06-27 17:13:03,597 INFO L125 PetriNetUnfolderBase]: For 331830/331830 co-relation queries the response was YES. [2024-06-27 17:13:03,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82133 conditions, 9624 events. 5317/9624 cut-off events. For 331830/331830 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 71563 event pairs, 196 based on Foata normal form. 74/9698 useless extension candidates. Maximal degree in co-relation 81684. Up to 2611 conditions per place. [2024-06-27 17:13:03,689 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 921 selfloop transitions, 1199 changer transitions 87/2210 dead transitions. [2024-06-27 17:13:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 2210 transitions, 40215 flow [2024-06-27 17:13:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-06-27 17:13:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2024-06-27 17:13:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 1044 transitions. [2024-06-27 17:13:03,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380466472303207 [2024-06-27 17:13:03,692 INFO L175 Difference]: Start difference. First operand has 462 places, 1335 transitions, 21472 flow. Second operand 98 states and 1044 transitions. [2024-06-27 17:13:03,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 2210 transitions, 40215 flow [2024-06-27 17:13:07,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 2210 transitions, 40041 flow, removed 72 selfloop flow, removed 10 redundant places. [2024-06-27 17:13:07,227 INFO L231 Difference]: Finished difference. Result has 584 places, 1810 transitions, 35198 flow [2024-06-27 17:13:07,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=21309, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=35198, PETRI_PLACES=584, PETRI_TRANSITIONS=1810} [2024-06-27 17:13:07,228 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 556 predicate places. [2024-06-27 17:13:07,228 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 1810 transitions, 35198 flow [2024-06-27 17:13:07,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.536585365853658) internal successors, (268), 41 states have internal predecessors, (268), 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) [2024-06-27 17:13:07,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:07,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:07,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-27 17:13:07,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:07,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:13:07,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash 420795083, now seen corresponding path program 8 times [2024-06-27 17:13:07,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:07,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29185302] [2024-06-27 17:13:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:07,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:11,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:11,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29185302] [2024-06-27 17:13:11,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29185302] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:11,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144642459] [2024-06-27 17:13:11,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:13:11,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:11,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:11,251 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) [2024-06-27 17:13:11,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 17:13:11,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:13:11,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:11,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 17:13:11,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:11,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:13:13,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:13,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-06-27 17:13:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:13:14,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:19,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:19,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 324 [2024-06-27 17:13:20,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:20,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-06-27 17:13:20,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:13:20,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-06-27 17:13:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:13:20,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-06-27 17:13:20,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:13:20,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-06-27 17:13:21,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:21,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-06-27 17:13:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:13:21,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-06-27 17:13:21,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:13:21,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-06-27 17:13:21,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:13:21,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-06-27 17:13:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:13:21,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-06-27 17:13:21,483 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 17:13:21,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2024-06-27 17:13:21,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:21,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 77 [2024-06-27 17:13:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:13:22,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144642459] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:22,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:22,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-06-27 17:13:22,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859821286] [2024-06-27 17:13:22,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:22,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-06-27 17:13:22,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:22,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-06-27 17:13:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2024-06-27 17:13:22,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:13:22,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 1810 transitions, 35198 flow. Second operand has 39 states, 39 states have (on average 6.641025641025641) internal successors, (259), 39 states have internal predecessors, (259), 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) [2024-06-27 17:13:22,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:22,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:13:22,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:14:24,343 INFO L124 PetriNetUnfolderBase]: 5754/10390 cut-off events. [2024-06-27 17:14:24,343 INFO L125 PetriNetUnfolderBase]: For 491750/491750 co-relation queries the response was YES. [2024-06-27 17:14:24,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101619 conditions, 10390 events. 5754/10390 cut-off events. For 491750/491750 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 78560 event pairs, 169 based on Foata normal form. 4/10394 useless extension candidates. Maximal degree in co-relation 101304. Up to 3917 conditions per place. [2024-06-27 17:14:24,578 INFO L140 encePairwiseOnDemand]: 13/28 looper letters, 854 selfloop transitions, 1357 changer transitions 27/2241 dead transitions. [2024-06-27 17:14:24,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 2241 transitions, 47836 flow [2024-06-27 17:14:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-27 17:14:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-27 17:14:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 675 transitions. [2024-06-27 17:14:24,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3545168067226891 [2024-06-27 17:14:24,580 INFO L175 Difference]: Start difference. First operand has 584 places, 1810 transitions, 35198 flow. Second operand 68 states and 675 transitions. [2024-06-27 17:14:24,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 2241 transitions, 47836 flow [2024-06-27 17:14:30,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 2241 transitions, 45567 flow, removed 1071 selfloop flow, removed 28 redundant places. [2024-06-27 17:14:30,951 INFO L231 Difference]: Finished difference. Result has 639 places, 2061 transitions, 44290 flow [2024-06-27 17:14:30,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=33204, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=44290, PETRI_PLACES=639, PETRI_TRANSITIONS=2061} [2024-06-27 17:14:30,953 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 611 predicate places. [2024-06-27 17:14:30,953 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 2061 transitions, 44290 flow [2024-06-27 17:14:30,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.641025641025641) internal successors, (259), 39 states have internal predecessors, (259), 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) [2024-06-27 17:14:30,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:14:30,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:14:30,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 17:14:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 17:14:31,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:14:31,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:14:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash -258993279, now seen corresponding path program 9 times [2024-06-27 17:14:31,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:14:31,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835446589] [2024-06-27 17:14:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:14:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:14:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:14:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:14:34,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:14:34,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835446589] [2024-06-27 17:14:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835446589] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:14:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781080916] [2024-06-27 17:14:34,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:14:34,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:14:34,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:14:34,928 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) [2024-06-27 17:14:34,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 17:14:35,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:14:35,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:14:35,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 17:14:35,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:14:35,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 17:14:35,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:14:35,591 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:14:35,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 17:14:35,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:14:38,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2024-06-27 17:14:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:14:39,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:14:50,246 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-06-27 17:14:50,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 403 treesize of output 413 [2024-06-27 17:14:50,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:50,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2024-06-27 17:14:50,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-06-27 17:14:50,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:50,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 197 [2024-06-27 17:14:52,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:52,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 405 treesize of output 396 [2024-06-27 17:14:52,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:52,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 255 treesize of output 249 [2024-06-27 17:14:53,223 INFO L349 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2024-06-27 17:14:53,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 196 [2024-06-27 17:14:53,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-06-27 17:14:54,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:54,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 238 [2024-06-27 17:15:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:15:00,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781080916] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:15:00,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:15:00,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 17:15:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121570679] [2024-06-27 17:15:00,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:15:00,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:15:00,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:15:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:15:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1479, Unknown=1, NotChecked=0, Total=1640 [2024-06-27 17:15:00,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:15:00,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 2061 transitions, 44290 flow. Second operand has 41 states, 41 states have (on average 6.560975609756097) internal successors, (269), 41 states have internal predecessors, (269), 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) [2024-06-27 17:15:00,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:15:00,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:15:00,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:15:08,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:15:54,201 INFO L124 PetriNetUnfolderBase]: 6141/11037 cut-off events. [2024-06-27 17:15:54,201 INFO L125 PetriNetUnfolderBase]: For 495756/495756 co-relation queries the response was YES. [2024-06-27 17:15:54,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112707 conditions, 11037 events. 6141/11037 cut-off events. For 495756/495756 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 83969 event pairs, 240 based on Foata normal form. 15/11052 useless extension candidates. Maximal degree in co-relation 112288. Up to 5102 conditions per place. [2024-06-27 17:15:54,338 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 1029 selfloop transitions, 1376 changer transitions 12/2420 dead transitions. [2024-06-27 17:15:54,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 2420 transitions, 56229 flow [2024-06-27 17:15:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-06-27 17:15:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-06-27 17:15:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 568 transitions. [2024-06-27 17:15:54,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36883116883116884 [2024-06-27 17:15:54,340 INFO L175 Difference]: Start difference. First operand has 639 places, 2061 transitions, 44290 flow. Second operand 55 states and 568 transitions. [2024-06-27 17:15:54,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 2420 transitions, 56229 flow [2024-06-27 17:16:03,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 2420 transitions, 54962 flow, removed 569 selfloop flow, removed 25 redundant places. [2024-06-27 17:16:03,207 INFO L231 Difference]: Finished difference. Result has 686 places, 2232 transitions, 52894 flow [2024-06-27 17:16:03,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=43349, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=52894, PETRI_PLACES=686, PETRI_TRANSITIONS=2232} [2024-06-27 17:16:03,208 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 658 predicate places. [2024-06-27 17:16:03,209 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 2232 transitions, 52894 flow [2024-06-27 17:16:03,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.560975609756097) internal successors, (269), 41 states have internal predecessors, (269), 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) [2024-06-27 17:16:03,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:16:03,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:16:03,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 17:16:03,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 17:16:03,410 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:16:03,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:16:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash -22790155, now seen corresponding path program 10 times [2024-06-27 17:16:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:16:03,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865882460] [2024-06-27 17:16:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:16:03,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:16:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:16:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:16:06,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:16:06,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865882460] [2024-06-27 17:16:06,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865882460] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:16:06,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547348897] [2024-06-27 17:16:06,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:16:06,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:16:06,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:16:06,885 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) [2024-06-27 17:16:06,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 17:16:06,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:16:06,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:16:06,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2024-06-27 17:16:06,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:16:07,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:16:09,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:16:09,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2024-06-27 17:16:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:16:11,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:16:15,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:16:15,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 324 [2024-06-27 17:16:15,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:16:15,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-06-27 17:16:16,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:16:16,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-06-27 17:16:16,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:16:16,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 327 treesize of output 323 [2024-06-27 17:16:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:16:19,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547348897] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:16:19,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:16:19,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 17:16:19,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574146157] [2024-06-27 17:16:19,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:16:19,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:16:19,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:16:19,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:16:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 17:16:20,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:16:20,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 2232 transitions, 52894 flow. Second operand has 41 states, 41 states have (on average 6.536585365853658) internal successors, (268), 41 states have internal predecessors, (268), 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) [2024-06-27 17:16:20,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:16:20,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:16:20,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:16:59,485 INFO L124 PetriNetUnfolderBase]: 6464/11631 cut-off events. [2024-06-27 17:16:59,486 INFO L125 PetriNetUnfolderBase]: For 512383/512383 co-relation queries the response was YES. [2024-06-27 17:16:59,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125413 conditions, 11631 events. 6464/11631 cut-off events. For 512383/512383 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 90331 event pairs, 260 based on Foata normal form. 24/11655 useless extension candidates. Maximal degree in co-relation 124953. Up to 3812 conditions per place. [2024-06-27 17:16:59,644 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 853 selfloop transitions, 1688 changer transitions 10/2554 dead transitions. [2024-06-27 17:16:59,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 2554 transitions, 64146 flow [2024-06-27 17:16:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-06-27 17:16:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-06-27 17:16:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 608 transitions. [2024-06-27 17:16:59,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36803874092009686 [2024-06-27 17:16:59,646 INFO L175 Difference]: Start difference. First operand has 686 places, 2232 transitions, 52894 flow. Second operand 59 states and 608 transitions. [2024-06-27 17:16:59,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 2554 transitions, 64146 flow [2024-06-27 17:17:08,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 2554 transitions, 63426 flow, removed 322 selfloop flow, removed 22 redundant places. [2024-06-27 17:17:08,613 INFO L231 Difference]: Finished difference. Result has 737 places, 2374 transitions, 62815 flow [2024-06-27 17:17:08,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=52230, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=62815, PETRI_PLACES=737, PETRI_TRANSITIONS=2374} [2024-06-27 17:17:08,615 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 709 predicate places. [2024-06-27 17:17:08,615 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 2374 transitions, 62815 flow [2024-06-27 17:17:08,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.536585365853658) internal successors, (268), 41 states have internal predecessors, (268), 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) [2024-06-27 17:17:08,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:17:08,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:17:08,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:17:08,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 17:17:08,816 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:17:08,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:17:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash -536316601, now seen corresponding path program 11 times [2024-06-27 17:17:08,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:17:08,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852666919] [2024-06-27 17:17:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:17:08,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:17:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:17:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:17:12,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:17:12,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852666919] [2024-06-27 17:17:12,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852666919] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:17:12,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354637501] [2024-06-27 17:17:12,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:17:12,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:17:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:17:12,652 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) [2024-06-27 17:17:12,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 17:17:12,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:17:12,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:17:12,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 17:17:12,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:17:13,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:17:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:17:15,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:17:18,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:17:18,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 145 [2024-06-27 17:17:18,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:17:18,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2024-06-27 17:17:18,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:17:18,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 166 [2024-06-27 17:17:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:17:20,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354637501] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:17:20,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:17:20,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 34 [2024-06-27 17:17:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284399804] [2024-06-27 17:17:20,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:17:20,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:17:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:17:20,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:17:20,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:17:20,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:17:20,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 2374 transitions, 62815 flow. Second operand has 35 states, 35 states have (on average 6.828571428571428) internal successors, (239), 35 states have internal predecessors, (239), 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) [2024-06-27 17:17:20,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:17:20,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:17:20,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:18:04,570 INFO L124 PetriNetUnfolderBase]: 3706/7159 cut-off events. [2024-06-27 17:18:04,570 INFO L125 PetriNetUnfolderBase]: For 433109/433109 co-relation queries the response was YES. [2024-06-27 17:18:04,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80931 conditions, 7159 events. 3706/7159 cut-off events. For 433109/433109 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 56411 event pairs, 213 based on Foata normal form. 653/7812 useless extension candidates. Maximal degree in co-relation 80728. Up to 2621 conditions per place. [2024-06-27 17:18:04,663 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 632 selfloop transitions, 586 changer transitions 334/1555 dead transitions. [2024-06-27 17:18:04,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 1555 transitions, 41458 flow [2024-06-27 17:18:04,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-06-27 17:18:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-06-27 17:18:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 722 transitions. [2024-06-27 17:18:04,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38486140724946694 [2024-06-27 17:18:04,665 INFO L175 Difference]: Start difference. First operand has 737 places, 2374 transitions, 62815 flow. Second operand 67 states and 722 transitions. [2024-06-27 17:18:04,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 1555 transitions, 41458 flow [2024-06-27 17:18:09,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1555 transitions, 38367 flow, removed 738 selfloop flow, removed 94 redundant places. [2024-06-27 17:18:09,306 INFO L231 Difference]: Finished difference. Result has 600 places, 1101 transitions, 29266 flow [2024-06-27 17:18:09,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=28306, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=29266, PETRI_PLACES=600, PETRI_TRANSITIONS=1101} [2024-06-27 17:18:09,307 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 572 predicate places. [2024-06-27 17:18:09,307 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 1101 transitions, 29266 flow [2024-06-27 17:18:09,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.828571428571428) internal successors, (239), 35 states have internal predecessors, (239), 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) [2024-06-27 17:18:09,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:18:09,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:18:09,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-06-27 17:18:09,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 17:18:09,508 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:18:09,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:18:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1354847677, now seen corresponding path program 12 times [2024-06-27 17:18:09,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:18:09,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054505343] [2024-06-27 17:18:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:18:09,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:18:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:18:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:18:13,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:18:13,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054505343] [2024-06-27 17:18:13,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054505343] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:18:13,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720780513] [2024-06-27 17:18:13,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:18:13,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:18:13,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:18:13,380 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) [2024-06-27 17:18:13,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 17:18:13,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:18:13,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:18:13,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 17:18:13,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:18:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:18:15,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:18:17,455 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-06-27 17:18:17,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 105 [2024-06-27 17:18:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:18:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720780513] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:18:18,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:18:18,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 33 [2024-06-27 17:18:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026646443] [2024-06-27 17:18:18,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:18:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:18:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:18:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:18:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:18:18,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:18:18,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1101 transitions, 29266 flow. Second operand has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 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) [2024-06-27 17:18:18,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:18:18,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:18:18,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:18:31,141 INFO L124 PetriNetUnfolderBase]: 3467/6302 cut-off events. [2024-06-27 17:18:31,142 INFO L125 PetriNetUnfolderBase]: For 268254/268254 co-relation queries the response was YES. [2024-06-27 17:18:31,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73285 conditions, 6302 events. 3467/6302 cut-off events. For 268254/268254 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 44231 event pairs, 177 based on Foata normal form. 3/6305 useless extension candidates. Maximal degree in co-relation 73121. Up to 4056 conditions per place. [2024-06-27 17:18:31,215 INFO L140 encePairwiseOnDemand]: 13/28 looper letters, 798 selfloop transitions, 542 changer transitions 3/1346 dead transitions. [2024-06-27 17:18:31,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1346 transitions, 37846 flow [2024-06-27 17:18:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:18:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:18:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 298 transitions. [2024-06-27 17:18:31,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38010204081632654 [2024-06-27 17:18:31,216 INFO L175 Difference]: Start difference. First operand has 600 places, 1101 transitions, 29266 flow. Second operand 28 states and 298 transitions. [2024-06-27 17:18:31,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1346 transitions, 37846 flow [2024-06-27 17:18:33,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1346 transitions, 36339 flow, removed 331 selfloop flow, removed 74 redundant places. [2024-06-27 17:18:33,828 INFO L231 Difference]: Finished difference. Result has 466 places, 1222 transitions, 33973 flow [2024-06-27 17:18:33,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=28124, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=33973, PETRI_PLACES=466, PETRI_TRANSITIONS=1222} [2024-06-27 17:18:33,829 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 438 predicate places. [2024-06-27 17:18:33,829 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1222 transitions, 33973 flow [2024-06-27 17:18:33,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 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) [2024-06-27 17:18:33,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:18:33,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:18:33,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 17:18:34,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 17:18:34,037 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:18:34,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:18:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2116231649, now seen corresponding path program 13 times [2024-06-27 17:18:34,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:18:34,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824330197] [2024-06-27 17:18:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:18:34,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:18:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:18:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:18:38,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:18:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824330197] [2024-06-27 17:18:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824330197] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:18:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622826386] [2024-06-27 17:18:38,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:18:38,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:18:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:18:38,331 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) [2024-06-27 17:18:38,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 17:18:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:18:38,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 17:18:38,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:18:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:18:41,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:18:44,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:18:44,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 270 [2024-06-27 17:19:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:14,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622826386] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:14,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:14,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 40 [2024-06-27 17:19:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730963144] [2024-06-27 17:19:14,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:14,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:19:14,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:14,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:19:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 17:19:14,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:19:14,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1222 transitions, 33973 flow. Second operand has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 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) [2024-06-27 17:19:14,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:14,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:19:14,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:27,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-06-27 17:19:31,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-06-27 17:19:38,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-06-27 17:19:42,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-06-27 17:19:54,229 INFO L124 PetriNetUnfolderBase]: 3804/6936 cut-off events. [2024-06-27 17:19:54,229 INFO L125 PetriNetUnfolderBase]: For 259845/259845 co-relation queries the response was YES. [2024-06-27 17:19:54,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79276 conditions, 6936 events. 3804/6936 cut-off events. For 259845/259845 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 50137 event pairs, 147 based on Foata normal form. 38/6974 useless extension candidates. Maximal degree in co-relation 79139. Up to 1726 conditions per place. [2024-06-27 17:19:54,309 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 544 selfloop transitions, 950 changer transitions 24/1521 dead transitions. [2024-06-27 17:19:54,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1521 transitions, 42946 flow [2024-06-27 17:19:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-06-27 17:19:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-06-27 17:19:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 623 transitions. [2024-06-27 17:19:54,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3423076923076923 [2024-06-27 17:19:54,311 INFO L175 Difference]: Start difference. First operand has 466 places, 1222 transitions, 33973 flow. Second operand 65 states and 623 transitions. [2024-06-27 17:19:54,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1521 transitions, 42946 flow [2024-06-27 17:19:57,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1521 transitions, 42288 flow, removed 110 selfloop flow, removed 12 redundant places. [2024-06-27 17:19:57,220 INFO L231 Difference]: Finished difference. Result has 530 places, 1376 transitions, 41584 flow [2024-06-27 17:19:57,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=33274, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=41584, PETRI_PLACES=530, PETRI_TRANSITIONS=1376} [2024-06-27 17:19:57,221 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 502 predicate places. [2024-06-27 17:19:57,221 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 1376 transitions, 41584 flow [2024-06-27 17:19:57,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 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) [2024-06-27 17:19:57,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:57,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:57,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:57,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 17:19:57,422 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:57,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash 203647865, now seen corresponding path program 14 times [2024-06-27 17:19:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:57,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478214533] [2024-06-27 17:19:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:57,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:20:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:20:01,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:20:01,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478214533] [2024-06-27 17:20:01,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478214533] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:20:01,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064029719] [2024-06-27 17:20:01,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:20:01,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:20:01,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:20:01,570 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) [2024-06-27 17:20:01,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 17:20:01,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:20:01,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:20:01,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 17:20:01,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:20:02,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:20:04,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:20:04,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-06-27 17:20:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:20:05,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:20:10,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:20:10,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 269 [2024-06-27 17:20:12,293 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:20:12,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:20:12,464 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:20:12,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:20:12,898 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:20:12,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:20:13,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:20:13,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:20:13,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:20:13,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:20:13,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:20:13,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:20:13,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:20:13,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:20:14,236 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-06-27 17:20:14,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 68 [2024-06-27 17:20:14,530 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:20:14,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:20:14,791 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-06-27 17:20:14,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 69 [2024-06-27 17:20:15,002 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:20:15,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2024-06-27 17:20:15,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:20:15,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-06-27 17:20:15,133 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:20:15,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2024-06-27 17:20:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:20:15,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064029719] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:20:15,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:20:15,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 42 [2024-06-27 17:20:15,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994589312] [2024-06-27 17:20:15,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:20:15,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-06-27 17:20:15,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:20:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-06-27 17:20:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2024-06-27 17:20:16,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:20:16,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 1376 transitions, 41584 flow. Second operand has 43 states, 43 states have (on average 6.511627906976744) internal successors, (280), 43 states have internal predecessors, (280), 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) [2024-06-27 17:20:16,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:20:16,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:20:16,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:21:03,298 INFO L124 PetriNetUnfolderBase]: 4203/7650 cut-off events. [2024-06-27 17:21:03,298 INFO L125 PetriNetUnfolderBase]: For 328381/328381 co-relation queries the response was YES. [2024-06-27 17:21:03,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93639 conditions, 7650 events. 4203/7650 cut-off events. For 328381/328381 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 55863 event pairs, 93 based on Foata normal form. 25/7675 useless extension candidates. Maximal degree in co-relation 93494. Up to 1688 conditions per place. [2024-06-27 17:21:03,395 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 439 selfloop transitions, 1310 changer transitions 16/1768 dead transitions. [2024-06-27 17:21:03,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 1768 transitions, 53226 flow [2024-06-27 17:21:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-06-27 17:21:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2024-06-27 17:21:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 880 transitions. [2024-06-27 17:21:03,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3453689167974882 [2024-06-27 17:21:03,397 INFO L175 Difference]: Start difference. First operand has 530 places, 1376 transitions, 41584 flow. Second operand 91 states and 880 transitions. [2024-06-27 17:21:03,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 1768 transitions, 53226 flow [2024-06-27 17:21:07,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1768 transitions, 52578 flow, removed 215 selfloop flow, removed 25 redundant places. [2024-06-27 17:21:07,297 INFO L231 Difference]: Finished difference. Result has 613 places, 1578 transitions, 52428 flow [2024-06-27 17:21:07,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=40990, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=52428, PETRI_PLACES=613, PETRI_TRANSITIONS=1578} [2024-06-27 17:21:07,299 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 585 predicate places. [2024-06-27 17:21:07,299 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1578 transitions, 52428 flow [2024-06-27 17:21:07,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.511627906976744) internal successors, (280), 43 states have internal predecessors, (280), 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) [2024-06-27 17:21:07,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:21:07,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:21:07,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 17:21:07,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:21:07,500 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:21:07,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:21:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1357483081, now seen corresponding path program 15 times [2024-06-27 17:21:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:21:07,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471188233] [2024-06-27 17:21:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:21:07,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:21:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:21:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:21:12,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:21:12,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471188233] [2024-06-27 17:21:12,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471188233] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:21:12,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969745666] [2024-06-27 17:21:12,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:21:12,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:21:12,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:21:12,257 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) [2024-06-27 17:21:12,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 17:21:12,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:21:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:21:12,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 17:21:12,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:21:13,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:21:15,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:21:15,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-06-27 17:21:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:21:16,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:21:21,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:21:21,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 269 [2024-06-27 17:21:22,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:21:22,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:21:23,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:21:23,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:21:23,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:21:23,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:21:23,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:21:23,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:21:23,670 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:21:23,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:21:23,807 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:21:23,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:21:23,973 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:21:23,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:21:24,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:21:24,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-06-27 17:21:24,592 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-06-27 17:21:24,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 66 [2024-06-27 17:21:24,840 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:21:24,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-06-27 17:21:25,004 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2024-06-27 17:21:25,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 48 [2024-06-27 17:21:25,231 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-06-27 17:21:25,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 53 [2024-06-27 17:21:25,406 INFO L349 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2024-06-27 17:21:25,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 61 [2024-06-27 17:21:25,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:21:25,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-06-27 17:21:25,600 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:21:25,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2024-06-27 17:21:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:21:26,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969745666] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:21:26,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:21:26,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 42 [2024-06-27 17:21:26,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642912798] [2024-06-27 17:21:26,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:21:26,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-06-27 17:21:26,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:21:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-06-27 17:21:26,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2024-06-27 17:21:26,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:21:26,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1578 transitions, 52428 flow. Second operand has 43 states, 43 states have (on average 6.534883720930233) internal successors, (281), 43 states have internal predecessors, (281), 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) [2024-06-27 17:21:26,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:21:26,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:21:26,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15