./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.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-bad-counter-queue2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:47:16,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:47:16,748 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:47:16,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:47:16,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:47:16,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:47:16,783 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:47:16,783 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:47:16,784 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:47:16,786 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:47:16,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:47:16,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:47:16,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:47:16,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:47:16,788 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:47:16,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:47:16,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:47:16,789 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:47:16,790 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:47:16,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:47:16,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:47:16,791 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:47:16,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:47:16,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:47:16,792 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:47:16,792 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:47:16,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:47:16,793 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:47:16,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:47:16,793 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:47:16,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:47:16,795 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:47:16,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:47:16,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:47:16,795 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:47:16,796 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:47:16,796 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:47:16,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:47:16,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:47:16,797 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:47:16,797 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:47:16,797 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:47:16,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:47:16,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-06-27 16:47:17,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:47:17,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:47:17,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:47:17,131 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:47:17,132 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:47:17,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2024-06-27 16:47:18,299 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:47:18,473 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:47:18,474 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2024-06-27 16:47:18,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd74edffd/c898decd08ac45598dac7090dc1c5bc6/FLAGa3fadaab7 [2024-06-27 16:47:18,493 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd74edffd/c898decd08ac45598dac7090dc1c5bc6 [2024-06-27 16:47:18,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:47:18,496 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:47:18,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:47:18,497 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:47:18,502 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:47:18,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61747c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18, skipping insertion in model container [2024-06-27 16:47:18,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,525 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:47:18,751 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-bad-counter-queue2.wvr.c[2297,2310] [2024-06-27 16:47:18,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:47:18,783 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:47:18,804 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-bad-counter-queue2.wvr.c[2297,2310] [2024-06-27 16:47:18,811 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:47:18,824 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:47:18,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18 WrapperNode [2024-06-27 16:47:18,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:47:18,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:47:18,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:47:18,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:47:18,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,838 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,862 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 132 [2024-06-27 16:47:18,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:47:18,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:47:18,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:47:18,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:47:18,879 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,882 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,898 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 16:47:18,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:47:18,914 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:47:18,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:47:18,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:47:18,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (1/1) ... [2024-06-27 16:47:18,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:47:18,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:18,952 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 16:47:18,977 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 16:47:19,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:47:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:47:19,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:47:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:47:19,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:47:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:47:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:47:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:47:19,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:47:19,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:47:19,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:47:19,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:47:19,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:47:19,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:47:19,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:47:19,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:47:19,007 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 16:47:19,179 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:47:19,181 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:47:19,358 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:47:19,358 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:47:19,599 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:47:19,599 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:47:19,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:47:19 BoogieIcfgContainer [2024-06-27 16:47:19,601 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:47:19,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:47:19,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:47:19,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:47:19,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:47:18" (1/3) ... [2024-06-27 16:47:19,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38635543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:47:19, skipping insertion in model container [2024-06-27 16:47:19,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:18" (2/3) ... [2024-06-27 16:47:19,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38635543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:47:19, skipping insertion in model container [2024-06-27 16:47:19,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:47:19" (3/3) ... [2024-06-27 16:47:19,617 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-06-27 16:47:19,623 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:47:19,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:47:19,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:47:19,630 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:47:19,663 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:47:19,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2024-06-27 16:47:19,718 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-06-27 16:47:19,719 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:47:19,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-06-27 16:47:19,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2024-06-27 16:47:19,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2024-06-27 16:47:19,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:47:19,741 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;@30ff9f41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:47:19,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:47:19,751 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:47:19,752 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-06-27 16:47:19,753 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:47:19,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:19,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:19,755 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 16:47:19,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:19,761 INFO L85 PathProgramCache]: Analyzing trace with hash -15705077, now seen corresponding path program 1 times [2024-06-27 16:47:19,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:19,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121969060] [2024-06-27 16:47:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:19,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:20,040 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 16:47:20,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:20,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121969060] [2024-06-27 16:47:20,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121969060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:20,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:20,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:47:20,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036686937] [2024-06-27 16:47:20,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:20,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:47:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:20,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:47:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:47:20,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-06-27 16:47:20,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 16:47:20,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:20,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-06-27 16:47:20,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:20,194 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2024-06-27 16:47:20,194 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-27 16:47:20,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 181 events. 93/181 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 575 event pairs, 22 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 315. Up to 113 conditions per place. [2024-06-27 16:47:20,198 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 25 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2024-06-27 16:47:20,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2024-06-27 16:47:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:47:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:47:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-06-27 16:47:20,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 16:47:20,210 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2024-06-27 16:47:20,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2024-06-27 16:47:20,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:47:20,215 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 65 flow [2024-06-27 16:47:20,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-06-27 16:47:20,220 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2024-06-27 16:47:20,221 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 65 flow [2024-06-27 16:47:20,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 16:47:20,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:20,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:20,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:47:20,222 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 16:47:20,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1557574075, now seen corresponding path program 1 times [2024-06-27 16:47:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:20,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759338260] [2024-06-27 16:47:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:20,520 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 16:47:20,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:20,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759338260] [2024-06-27 16:47:20,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759338260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:20,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:20,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:47:20,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7602148] [2024-06-27 16:47:20,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:20,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:20,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:47:20,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:47:20,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 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 16:47:20,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:20,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:47:20,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:20,682 INFO L124 PetriNetUnfolderBase]: 171/329 cut-off events. [2024-06-27 16:47:20,683 INFO L125 PetriNetUnfolderBase]: For 43/46 co-relation queries the response was YES. [2024-06-27 16:47:20,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 329 events. 171/329 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1328 event pairs, 111 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 257. Up to 209 conditions per place. [2024-06-27 16:47:20,686 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-06-27 16:47:20,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2024-06-27 16:47:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:47:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:47:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-06-27 16:47:20,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-27 16:47:20,688 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 65 flow. Second operand 5 states and 62 transitions. [2024-06-27 16:47:20,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2024-06-27 16:47:20,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:20,690 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 98 flow [2024-06-27 16:47:20,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-06-27 16:47:20,691 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-06-27 16:47:20,692 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 98 flow [2024-06-27 16:47:20,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 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 16:47:20,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:20,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:47:20,693 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 16:47:20,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -577907976, now seen corresponding path program 1 times [2024-06-27 16:47:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710008470] [2024-06-27 16:47:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:20,844 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 16:47:20,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710008470] [2024-06-27 16:47:20,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710008470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:20,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:20,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:47:20,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129106735] [2024-06-27 16:47:20,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:20,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:20,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:20,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:20,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:47:20,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:47:20,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 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 16:47:20,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:20,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:47:20,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:21,023 INFO L124 PetriNetUnfolderBase]: 138/264 cut-off events. [2024-06-27 16:47:21,023 INFO L125 PetriNetUnfolderBase]: For 100/114 co-relation queries the response was YES. [2024-06-27 16:47:21,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 264 events. 138/264 cut-off events. For 100/114 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 961 event pairs, 95 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 509. Up to 205 conditions per place. [2024-06-27 16:47:21,026 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 20 selfloop transitions, 2 changer transitions 15/39 dead transitions. [2024-06-27 16:47:21,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 209 flow [2024-06-27 16:47:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:47:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:47:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-06-27 16:47:21,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 16:47:21,029 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 98 flow. Second operand 5 states and 56 transitions. [2024-06-27 16:47:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 209 flow [2024-06-27 16:47:21,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:21,031 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2024-06-27 16:47:21,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-06-27 16:47:21,032 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-06-27 16:47:21,033 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2024-06-27 16:47:21,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 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 16:47:21,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:21,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:21,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:47:21,034 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 16:47:21,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash 182329702, now seen corresponding path program 1 times [2024-06-27 16:47:21,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:21,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166961101] [2024-06-27 16:47:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:21,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:21,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:21,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166961101] [2024-06-27 16:47:21,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166961101] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:21,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910553058] [2024-06-27 16:47:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:21,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:21,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:21,186 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 16:47:21,187 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 16:47:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:21,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:47:21,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:21,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:21,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910553058] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:21,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:21,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-06-27 16:47:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107946934] [2024-06-27 16:47:21,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:21,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:47:21,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:47:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:47:21,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:47:21,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 86 flow. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:21,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:21,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:47:21,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:21,551 INFO L124 PetriNetUnfolderBase]: 139/249 cut-off events. [2024-06-27 16:47:21,551 INFO L125 PetriNetUnfolderBase]: For 83/103 co-relation queries the response was YES. [2024-06-27 16:47:21,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 249 events. 139/249 cut-off events. For 83/103 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 835 event pairs, 33 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 642. Up to 101 conditions per place. [2024-06-27 16:47:21,557 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 31 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-06-27 16:47:21,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 214 flow [2024-06-27 16:47:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:47:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:47:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-06-27 16:47:21,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 16:47:21,560 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 7 states and 64 transitions. [2024-06-27 16:47:21,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 214 flow [2024-06-27 16:47:21,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 186 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 16:47:21,564 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 97 flow [2024-06-27 16:47:21,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-27 16:47:21,566 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2024-06-27 16:47:21,566 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 97 flow [2024-06-27 16:47:21,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:21,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:21,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:21,586 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 16:47:21,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:21,781 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 16:47:21,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:21,781 INFO L85 PathProgramCache]: Analyzing trace with hash -490579767, now seen corresponding path program 1 times [2024-06-27 16:47:21,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:21,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965086695] [2024-06-27 16:47:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:21,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:21,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:21,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965086695] [2024-06-27 16:47:21,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965086695] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:21,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379497392] [2024-06-27 16:47:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:21,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:21,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:21,899 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 16:47:21,917 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 16:47:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:21,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:47:21,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:22,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:22,068 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 16:47:22,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379497392] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:22,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:47:22,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-06-27 16:47:22,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937971174] [2024-06-27 16:47:22,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:22,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:22,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:47:22,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:47:22,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 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 16:47:22,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:22,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:47:22,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:22,148 INFO L124 PetriNetUnfolderBase]: 136/254 cut-off events. [2024-06-27 16:47:22,148 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-06-27 16:47:22,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 671 conditions, 254 events. 136/254 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 814 event pairs, 43 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 649. Up to 130 conditions per place. [2024-06-27 16:47:22,150 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 28 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-27 16:47:22,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 201 flow [2024-06-27 16:47:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:47:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:47:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2024-06-27 16:47:22,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 16:47:22,152 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 97 flow. Second operand 5 states and 49 transitions. [2024-06-27 16:47:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 201 flow [2024-06-27 16:47:22,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:47:22,154 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 117 flow [2024-06-27 16:47:22,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-06-27 16:47:22,155 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 12 predicate places. [2024-06-27 16:47:22,155 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 117 flow [2024-06-27 16:47:22,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 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 16:47:22,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:22,155 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] [2024-06-27 16:47:22,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:22,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:22,365 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 16:47:22,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1176065503, now seen corresponding path program 1 times [2024-06-27 16:47:22,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:22,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789764332] [2024-06-27 16:47:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:22,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:22,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789764332] [2024-06-27 16:47:22,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789764332] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:22,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599095825] [2024-06-27 16:47:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:22,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:22,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:22,714 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 16:47:22,730 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 16:47:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:22,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:47:22,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:22,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:22,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:22,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-06-27 16:47:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:22,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599095825] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:22,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:22,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-06-27 16:47:22,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388479092] [2024-06-27 16:47:22,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:22,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:47:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:47:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:47:22,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-06-27 16:47:22,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 117 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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 16:47:22,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:22,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-06-27 16:47:22,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:23,218 INFO L124 PetriNetUnfolderBase]: 172/341 cut-off events. [2024-06-27 16:47:23,219 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-06-27 16:47:23,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 341 events. 172/341 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1329 event pairs, 29 based on Foata normal form. 2/342 useless extension candidates. Maximal degree in co-relation 1000. Up to 195 conditions per place. [2024-06-27 16:47:23,222 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 41 selfloop transitions, 23 changer transitions 2/71 dead transitions. [2024-06-27 16:47:23,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 419 flow [2024-06-27 16:47:23,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:47:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:47:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-27 16:47:23,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 16:47:23,226 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 117 flow. Second operand 10 states and 114 transitions. [2024-06-27 16:47:23,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 419 flow [2024-06-27 16:47:23,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 16:47:23,231 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 288 flow [2024-06-27 16:47:23,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=288, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-06-27 16:47:23,234 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2024-06-27 16:47:23,234 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 288 flow [2024-06-27 16:47:23,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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 16:47:23,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:23,235 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] [2024-06-27 16:47:23,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:23,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:23,449 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 16:47:23,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:23,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1605095481, now seen corresponding path program 2 times [2024-06-27 16:47:23,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:23,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546394936] [2024-06-27 16:47:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:23,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:23,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:23,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546394936] [2024-06-27 16:47:23,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546394936] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:23,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458441716] [2024-06-27 16:47:23,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:47:23,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:23,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:23,730 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 16:47:23,751 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 16:47:23,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:47:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:23,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:47:23,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:23,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:23,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:23,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-06-27 16:47:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:23,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458441716] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:23,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:23,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 12 [2024-06-27 16:47:23,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224574445] [2024-06-27 16:47:23,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:23,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:47:23,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:47:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:47:24,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-06-27 16:47:24,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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 16:47:24,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:24,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-06-27 16:47:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:24,175 INFO L124 PetriNetUnfolderBase]: 212/424 cut-off events. [2024-06-27 16:47:24,175 INFO L125 PetriNetUnfolderBase]: For 719/723 co-relation queries the response was YES. [2024-06-27 16:47:24,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 424 events. 212/424 cut-off events. For 719/723 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1843 event pairs, 37 based on Foata normal form. 5/427 useless extension candidates. Maximal degree in co-relation 1486. Up to 208 conditions per place. [2024-06-27 16:47:24,179 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 36 selfloop transitions, 39 changer transitions 1/81 dead transitions. [2024-06-27 16:47:24,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 610 flow [2024-06-27 16:47:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:47:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:47:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-27 16:47:24,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2024-06-27 16:47:24,181 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 288 flow. Second operand 9 states and 103 transitions. [2024-06-27 16:47:24,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 610 flow [2024-06-27 16:47:24,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 578 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:24,185 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 475 flow [2024-06-27 16:47:24,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=475, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2024-06-27 16:47:24,186 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2024-06-27 16:47:24,186 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 475 flow [2024-06-27 16:47:24,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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 16:47:24,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:24,187 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] [2024-06-27 16:47:24,205 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 16:47:24,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:24,402 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 16:47:24,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -640245501, now seen corresponding path program 3 times [2024-06-27 16:47:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:24,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735514322] [2024-06-27 16:47:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:24,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:24,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735514322] [2024-06-27 16:47:24,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735514322] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906747225] [2024-06-27 16:47:24,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:47:24,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:24,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:24,844 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 16:47:24,864 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 16:47:24,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:47:24,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:24,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:47:24,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:24,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:25,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:25,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-06-27 16:47:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906747225] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:25,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:25,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-06-27 16:47:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005413340] [2024-06-27 16:47:25,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:25,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:47:25,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:47:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:47:25,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-06-27 16:47:25,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 475 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:25,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:25,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-06-27 16:47:25,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:25,340 INFO L124 PetriNetUnfolderBase]: 268/537 cut-off events. [2024-06-27 16:47:25,341 INFO L125 PetriNetUnfolderBase]: For 1172/1180 co-relation queries the response was YES. [2024-06-27 16:47:25,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 537 events. 268/537 cut-off events. For 1172/1180 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2545 event pairs, 37 based on Foata normal form. 9/542 useless extension candidates. Maximal degree in co-relation 2038. Up to 223 conditions per place. [2024-06-27 16:47:25,346 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 43 selfloop transitions, 56 changer transitions 1/105 dead transitions. [2024-06-27 16:47:25,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 105 transitions, 878 flow [2024-06-27 16:47:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:47:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:47:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-27 16:47:25,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2024-06-27 16:47:25,347 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 475 flow. Second operand 12 states and 131 transitions. [2024-06-27 16:47:25,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 105 transitions, 878 flow [2024-06-27 16:47:25,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 105 transitions, 815 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 16:47:25,355 INFO L231 Difference]: Finished difference. Result has 66 places, 78 transitions, 681 flow [2024-06-27 16:47:25,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=681, PETRI_PLACES=66, PETRI_TRANSITIONS=78} [2024-06-27 16:47:25,355 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2024-06-27 16:47:25,356 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 78 transitions, 681 flow [2024-06-27 16:47:25,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:25,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:25,356 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] [2024-06-27 16:47:25,374 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 16:47:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:25,571 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 16:47:25,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash -433954945, now seen corresponding path program 4 times [2024-06-27 16:47:25,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:25,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399894190] [2024-06-27 16:47:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:25,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:25,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:25,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399894190] [2024-06-27 16:47:25,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399894190] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:25,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328525095] [2024-06-27 16:47:25,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:47:25,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:25,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:25,929 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 16:47:25,930 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 16:47:26,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:47:26,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:26,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:47:26,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:26,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:26,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:26,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-06-27 16:47:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:26,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328525095] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:26,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:26,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-06-27 16:47:26,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740987553] [2024-06-27 16:47:26,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:26,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:47:26,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:26,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:47:26,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:47:26,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-06-27 16:47:26,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 78 transitions, 681 flow. Second operand has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:26,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:26,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-06-27 16:47:26,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:26,476 INFO L124 PetriNetUnfolderBase]: 307/613 cut-off events. [2024-06-27 16:47:26,477 INFO L125 PetriNetUnfolderBase]: For 1535/1535 co-relation queries the response was YES. [2024-06-27 16:47:26,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 613 events. 307/613 cut-off events. For 1535/1535 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3055 event pairs, 60 based on Foata normal form. 1/611 useless extension candidates. Maximal degree in co-relation 2414. Up to 457 conditions per place. [2024-06-27 16:47:26,482 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 76 selfloop transitions, 22 changer transitions 1/104 dead transitions. [2024-06-27 16:47:26,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 1005 flow [2024-06-27 16:47:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:47:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:47:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-27 16:47:26,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44907407407407407 [2024-06-27 16:47:26,484 INFO L175 Difference]: Start difference. First operand has 66 places, 78 transitions, 681 flow. Second operand 9 states and 97 transitions. [2024-06-27 16:47:26,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 1005 flow [2024-06-27 16:47:26,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 963 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 16:47:26,490 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 788 flow [2024-06-27 16:47:26,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=788, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-27 16:47:26,491 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 50 predicate places. [2024-06-27 16:47:26,491 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 788 flow [2024-06-27 16:47:26,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:26,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:26,492 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] [2024-06-27 16:47:26,508 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 16:47:26,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:26,708 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 16:47:26,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:26,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1494733035, now seen corresponding path program 5 times [2024-06-27 16:47:26,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:26,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858376216] [2024-06-27 16:47:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:26,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:27,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858376216] [2024-06-27 16:47:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858376216] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728463113] [2024-06-27 16:47:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:47:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:27,075 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 16:47:27,092 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 16:47:27,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:47:27,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:27,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:47:27,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:27,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:27,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:27,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-06-27 16:47:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728463113] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:27,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:27,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2024-06-27 16:47:27,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868441306] [2024-06-27 16:47:27,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:47:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:47:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:47:27,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-06-27 16:47:27,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 788 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 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 16:47:27,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:27,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-06-27 16:47:27,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:27,594 INFO L124 PetriNetUnfolderBase]: 346/691 cut-off events. [2024-06-27 16:47:27,594 INFO L125 PetriNetUnfolderBase]: For 1888/1888 co-relation queries the response was YES. [2024-06-27 16:47:27,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 691 events. 346/691 cut-off events. For 1888/1888 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3576 event pairs, 65 based on Foata normal form. 1/690 useless extension candidates. Maximal degree in co-relation 2751. Up to 468 conditions per place. [2024-06-27 16:47:27,600 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 77 selfloop transitions, 36 changer transitions 1/119 dead transitions. [2024-06-27 16:47:27,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 1170 flow [2024-06-27 16:47:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:47:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:47:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-27 16:47:27,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 16:47:27,602 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 788 flow. Second operand 10 states and 108 transitions. [2024-06-27 16:47:27,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 1170 flow [2024-06-27 16:47:27,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 119 transitions, 1158 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 16:47:27,611 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 971 flow [2024-06-27 16:47:27,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=971, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2024-06-27 16:47:27,612 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2024-06-27 16:47:27,612 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 971 flow [2024-06-27 16:47:27,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 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 16:47:27,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:27,612 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] [2024-06-27 16:47:27,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:27,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:27,827 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 16:47:27,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1682150123, now seen corresponding path program 6 times [2024-06-27 16:47:27,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:27,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333052092] [2024-06-27 16:47:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:27,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:28,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:28,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333052092] [2024-06-27 16:47:28,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333052092] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:28,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474211648] [2024-06-27 16:47:28,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:47:28,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:28,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:28,172 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 16:47:28,190 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 16:47:28,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:47:28,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:28,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:47:28,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:28,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:28,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:28,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-06-27 16:47:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474211648] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:28,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:28,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 15 [2024-06-27 16:47:28,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605800727] [2024-06-27 16:47:28,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:28,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:47:28,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:47:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:47:28,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-06-27 16:47:28,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 971 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 16:47:28,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:28,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-06-27 16:47:28,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:28,741 INFO L124 PetriNetUnfolderBase]: 388/778 cut-off events. [2024-06-27 16:47:28,742 INFO L125 PetriNetUnfolderBase]: For 2640/2640 co-relation queries the response was YES. [2024-06-27 16:47:28,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3327 conditions, 778 events. 388/778 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4145 event pairs, 66 based on Foata normal form. 1/777 useless extension candidates. Maximal degree in co-relation 3282. Up to 475 conditions per place. [2024-06-27 16:47:28,749 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 80 selfloop transitions, 52 changer transitions 1/138 dead transitions. [2024-06-27 16:47:28,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1456 flow [2024-06-27 16:47:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:47:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:47:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-27 16:47:28,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-06-27 16:47:28,750 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 971 flow. Second operand 12 states and 125 transitions. [2024-06-27 16:47:28,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1456 flow [2024-06-27 16:47:28,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 138 transitions, 1390 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 16:47:28,762 INFO L231 Difference]: Finished difference. Result has 93 places, 117 transitions, 1195 flow [2024-06-27 16:47:28,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1195, PETRI_PLACES=93, PETRI_TRANSITIONS=117} [2024-06-27 16:47:28,763 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 68 predicate places. [2024-06-27 16:47:28,763 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 117 transitions, 1195 flow [2024-06-27 16:47:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 16:47:28,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:28,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:28,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-06-27 16:47:28,977 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,SelfDestructingSolverStorable10 [2024-06-27 16:47:28,977 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 16:47:28,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:28,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1710960789, now seen corresponding path program 7 times [2024-06-27 16:47:28,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:28,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337016210] [2024-06-27 16:47:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:29,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:29,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337016210] [2024-06-27 16:47:29,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337016210] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:29,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132540604] [2024-06-27 16:47:29,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:47:29,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:29,065 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 16:47:29,083 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 16:47:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:29,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:47:29,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:29,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:29,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132540604] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:29,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:29,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 16:47:29,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137421520] [2024-06-27 16:47:29,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:29,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:47:29,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:29,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:47:29,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:47:29,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:47:29,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 117 transitions, 1195 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:29,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:29,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:47:29,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:29,582 INFO L124 PetriNetUnfolderBase]: 863/1638 cut-off events. [2024-06-27 16:47:29,582 INFO L125 PetriNetUnfolderBase]: For 6316/6319 co-relation queries the response was YES. [2024-06-27 16:47:29,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7132 conditions, 1638 events. 863/1638 cut-off events. For 6316/6319 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9728 event pairs, 375 based on Foata normal form. 60/1697 useless extension candidates. Maximal degree in co-relation 5840. Up to 900 conditions per place. [2024-06-27 16:47:29,596 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 208 selfloop transitions, 26 changer transitions 0/237 dead transitions. [2024-06-27 16:47:29,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 237 transitions, 2872 flow [2024-06-27 16:47:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:47:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:47:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-27 16:47:29,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 16:47:29,597 INFO L175 Difference]: Start difference. First operand has 93 places, 117 transitions, 1195 flow. Second operand 7 states and 81 transitions. [2024-06-27 16:47:29,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 237 transitions, 2872 flow [2024-06-27 16:47:29,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 237 transitions, 2776 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 16:47:29,620 INFO L231 Difference]: Finished difference. Result has 100 places, 141 transitions, 1569 flow [2024-06-27 16:47:29,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1569, PETRI_PLACES=100, PETRI_TRANSITIONS=141} [2024-06-27 16:47:29,622 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2024-06-27 16:47:29,622 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 141 transitions, 1569 flow [2024-06-27 16:47:29,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:29,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:29,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:29,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:29,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:29,840 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 16:47:29,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1186603380, now seen corresponding path program 8 times [2024-06-27 16:47:29,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:29,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51130092] [2024-06-27 16:47:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:29,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51130092] [2024-06-27 16:47:29,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51130092] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569400459] [2024-06-27 16:47:29,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:47:29,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:29,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:29,921 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 16:47:29,923 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 16:47:29,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:47:29,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:29,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:47:30,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:30,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:30,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569400459] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:30,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:30,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 16:47:30,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134940252] [2024-06-27 16:47:30,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:30,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:47:30,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:47:30,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:47:30,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:47:30,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 141 transitions, 1569 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:30,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:30,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:47:30,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:30,406 INFO L124 PetriNetUnfolderBase]: 761/1460 cut-off events. [2024-06-27 16:47:30,406 INFO L125 PetriNetUnfolderBase]: For 6507/6549 co-relation queries the response was YES. [2024-06-27 16:47:30,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6700 conditions, 1460 events. 761/1460 cut-off events. For 6507/6549 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8537 event pairs, 370 based on Foata normal form. 55/1514 useless extension candidates. Maximal degree in co-relation 5719. Up to 917 conditions per place. [2024-06-27 16:47:30,417 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 112 selfloop transitions, 3 changer transitions 82/200 dead transitions. [2024-06-27 16:47:30,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 200 transitions, 2558 flow [2024-06-27 16:47:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:47:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:47:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-27 16:47:30,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 16:47:30,419 INFO L175 Difference]: Start difference. First operand has 100 places, 141 transitions, 1569 flow. Second operand 7 states and 78 transitions. [2024-06-27 16:47:30,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 200 transitions, 2558 flow [2024-06-27 16:47:30,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 200 transitions, 2542 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 16:47:30,443 INFO L231 Difference]: Finished difference. Result has 107 places, 118 transitions, 1251 flow [2024-06-27 16:47:30,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1251, PETRI_PLACES=107, PETRI_TRANSITIONS=118} [2024-06-27 16:47:30,444 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 82 predicate places. [2024-06-27 16:47:30,444 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 118 transitions, 1251 flow [2024-06-27 16:47:30,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:30,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:30,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:30,459 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 16:47:30,659 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,SelfDestructingSolverStorable12 [2024-06-27 16:47:30,659 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 16:47:30,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1092073402, now seen corresponding path program 9 times [2024-06-27 16:47:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:30,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690584189] [2024-06-27 16:47:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:47:30,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:30,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690584189] [2024-06-27 16:47:30,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690584189] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:30,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598831152] [2024-06-27 16:47:30,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:47:30,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:30,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:30,762 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 16:47:30,780 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 16:47:30,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:47:30,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:30,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:47:30,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:47:30,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:47:30,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598831152] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:30,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:30,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-06-27 16:47:30,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980228159] [2024-06-27 16:47:30,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:30,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:47:30,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:47:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:47:31,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:47:31,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 118 transitions, 1251 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:31,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:31,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:47:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:31,253 INFO L124 PetriNetUnfolderBase]: 489/883 cut-off events. [2024-06-27 16:47:31,254 INFO L125 PetriNetUnfolderBase]: For 3784/3830 co-relation queries the response was YES. [2024-06-27 16:47:31,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4204 conditions, 883 events. 489/883 cut-off events. For 3784/3830 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4261 event pairs, 72 based on Foata normal form. 62/944 useless extension candidates. Maximal degree in co-relation 4158. Up to 380 conditions per place. [2024-06-27 16:47:31,262 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 107 selfloop transitions, 29 changer transitions 0/139 dead transitions. [2024-06-27 16:47:31,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 1657 flow [2024-06-27 16:47:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:47:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:47:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-06-27 16:47:31,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2024-06-27 16:47:31,264 INFO L175 Difference]: Start difference. First operand has 107 places, 118 transitions, 1251 flow. Second operand 9 states and 82 transitions. [2024-06-27 16:47:31,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 1657 flow [2024-06-27 16:47:31,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 139 transitions, 1493 flow, removed 59 selfloop flow, removed 12 redundant places. [2024-06-27 16:47:31,280 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 1204 flow [2024-06-27 16:47:31,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1204, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2024-06-27 16:47:31,281 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2024-06-27 16:47:31,282 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 1204 flow [2024-06-27 16:47:31,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:31,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:31,283 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:31,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:31,498 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,SelfDestructingSolverStorable13 [2024-06-27 16:47:31,498 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 16:47:31,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:31,499 INFO L85 PathProgramCache]: Analyzing trace with hash 282254261, now seen corresponding path program 10 times [2024-06-27 16:47:31,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:31,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644127399] [2024-06-27 16:47:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:31,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:47:31,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:31,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644127399] [2024-06-27 16:47:31,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644127399] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:31,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076131248] [2024-06-27 16:47:31,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:47:31,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:31,600 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 16:47:31,603 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 16:47:31,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:47:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:31,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:47:31,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:31,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:31,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076131248] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:31,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:31,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-06-27 16:47:31,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494615333] [2024-06-27 16:47:31,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:31,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:47:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:47:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:47:31,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:47:31,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 1204 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:31,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:31,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:47:31,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:32,100 INFO L124 PetriNetUnfolderBase]: 635/1075 cut-off events. [2024-06-27 16:47:32,100 INFO L125 PetriNetUnfolderBase]: For 3636/3636 co-relation queries the response was YES. [2024-06-27 16:47:32,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4828 conditions, 1075 events. 635/1075 cut-off events. For 3636/3636 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4590 event pairs, 133 based on Foata normal form. 68/1143 useless extension candidates. Maximal degree in co-relation 4773. Up to 435 conditions per place. [2024-06-27 16:47:32,109 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 130 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2024-06-27 16:47:32,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 159 transitions, 1772 flow [2024-06-27 16:47:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:47:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:47:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 80 transitions. [2024-06-27 16:47:32,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 16:47:32,112 INFO L175 Difference]: Start difference. First operand has 99 places, 120 transitions, 1204 flow. Second operand 9 states and 80 transitions. [2024-06-27 16:47:32,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 159 transitions, 1772 flow [2024-06-27 16:47:32,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1724 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 16:47:32,126 INFO L231 Difference]: Finished difference. Result has 103 places, 123 transitions, 1273 flow [2024-06-27 16:47:32,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1273, PETRI_PLACES=103, PETRI_TRANSITIONS=123} [2024-06-27 16:47:32,127 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 78 predicate places. [2024-06-27 16:47:32,127 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 123 transitions, 1273 flow [2024-06-27 16:47:32,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:32,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:32,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:32,144 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 16:47:32,344 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,SelfDestructingSolverStorable14 [2024-06-27 16:47:32,345 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 16:47:32,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1193675087, now seen corresponding path program 11 times [2024-06-27 16:47:32,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:32,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167452866] [2024-06-27 16:47:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:32,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:33,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167452866] [2024-06-27 16:47:33,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167452866] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478892917] [2024-06-27 16:47:33,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:47:33,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:33,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:33,112 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 16:47:33,133 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 16:47:33,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:47:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:33,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:47:33,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:33,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:33,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:33,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:47:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:33,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478892917] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:33,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:33,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 29 [2024-06-27 16:47:33,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495227072] [2024-06-27 16:47:33,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:33,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:47:33,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:47:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:47:33,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:47:33,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 123 transitions, 1273 flow. Second operand has 30 states, 30 states have (on average 6.1) internal successors, (183), 30 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:33,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:33,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:47:33,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:34,962 INFO L124 PetriNetUnfolderBase]: 592/1111 cut-off events. [2024-06-27 16:47:34,963 INFO L125 PetriNetUnfolderBase]: For 4169/4177 co-relation queries the response was YES. [2024-06-27 16:47:34,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5161 conditions, 1111 events. 592/1111 cut-off events. For 4169/4177 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5481 event pairs, 11 based on Foata normal form. 5/1114 useless extension candidates. Maximal degree in co-relation 5104. Up to 589 conditions per place. [2024-06-27 16:47:34,972 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 125 selfloop transitions, 84 changer transitions 1/214 dead transitions. [2024-06-27 16:47:34,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 214 transitions, 2224 flow [2024-06-27 16:47:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:47:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:47:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 224 transitions. [2024-06-27 16:47:34,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-06-27 16:47:34,975 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 1273 flow. Second operand 23 states and 224 transitions. [2024-06-27 16:47:34,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 214 transitions, 2224 flow [2024-06-27 16:47:34,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 214 transitions, 2217 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:47:34,992 INFO L231 Difference]: Finished difference. Result has 127 places, 151 transitions, 1733 flow [2024-06-27 16:47:34,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1733, PETRI_PLACES=127, PETRI_TRANSITIONS=151} [2024-06-27 16:47:34,993 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 102 predicate places. [2024-06-27 16:47:34,993 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 151 transitions, 1733 flow [2024-06-27 16:47:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.1) internal successors, (183), 30 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:34,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:34,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:35,012 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 16:47:35,208 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,SelfDestructingSolverStorable15 [2024-06-27 16:47:35,208 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 16:47:35,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash -822661715, now seen corresponding path program 12 times [2024-06-27 16:47:35,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:35,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358966200] [2024-06-27 16:47:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:35,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:35,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:35,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358966200] [2024-06-27 16:47:35,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358966200] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:35,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382639707] [2024-06-27 16:47:35,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:47:35,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:35,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:35,928 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 16:47:35,932 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 16:47:36,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:47:36,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:36,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 16:47:36,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:36,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:47:36,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:36,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-06-27 16:47:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:36,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:41,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382639707] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:41,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:41,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 12] total 39 [2024-06-27 16:47:41,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828442821] [2024-06-27 16:47:41,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:41,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-06-27 16:47:41,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:41,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-06-27 16:47:41,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1376, Unknown=1, NotChecked=0, Total=1560 [2024-06-27 16:47:41,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:47:41,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 151 transitions, 1733 flow. Second operand has 40 states, 40 states have (on average 4.9) internal successors, (196), 40 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:41,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:41,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:47:41,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:46,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:47:50,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:47:54,550 WARN L539 Checker$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 16:48:02,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:48:06,957 WARN L539 Checker$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 16:48:10,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:48:15,000 WARN L539 Checker$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 16:48:19,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:48:23,129 WARN L539 Checker$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 16:48:47,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:48:51,426 WARN L539 Checker$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 16:48:55,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:49:03,586 WARN L539 Checker$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 16:49:11,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:49:19,862 WARN L539 Checker$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 16:49:23,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:49:27,899 WARN L539 Checker$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 16:49:31,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:49:35,935 WARN L539 Checker$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 16:49:39,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:50:08,210 WARN L539 Checker$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 16:50:16,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:50:20,313 WARN L539 Checker$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 16:50:28,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:50:32,467 WARN L539 Checker$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 16:50:36,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:50:40,505 WARN L539 Checker$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 16:50:44,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:50:48,684 WARN L539 Checker$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 16:51:28,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:51:36,978 WARN L539 Checker$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 16:51:40,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:51:45,023 WARN L539 Checker$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 16:51:49,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:51:57,180 WARN L539 Checker$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 16:52:01,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:52:05,302 WARN L539 Checker$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 16:52:09,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:52:13,343 WARN L539 Checker$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 16:52:17,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:52:21,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:52:25,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:52:29,604 WARN L539 Checker$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 16:52:33,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:52:37,757 WARN L539 Checker$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 16:52:41,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:53:09,912 WARN L539 Checker$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 16:53:13,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:53:17,960 WARN L539 Checker$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 16:53:21,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:53:30,063 WARN L539 Checker$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 16:53:38,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:53:42,139 WARN L539 Checker$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 16:53:46,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:53:50,162 WARN L539 Checker$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 16:53:58,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:54:02,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:54:06,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:54:14,454 WARN L539 Checker$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 16:54:18,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:54:22,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:54:26,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:54:30,867 WARN L539 Checker$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 16:54:32,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:54:36,659 WARN L539 Checker$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 16:55:04,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:55:08,831 WARN L539 Checker$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 16:55:12,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:55:16,921 WARN L539 Checker$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 16:55:20,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:55:24,973 WARN L539 Checker$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 16:55:28,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:55:33,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:55:37,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:55:45,289 WARN L539 Checker$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 16:55:49,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:55:53,325 WARN L539 Checker$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 16:55:57,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:56:01,356 WARN L539 Checker$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 16:56:09,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:56:13,614 WARN L539 Checker$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 16:56:17,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:56:21,688 WARN L539 Checker$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 16:56:25,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:56:29,730 WARN L539 Checker$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 16:56:33,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:56:37,772 WARN L539 Checker$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 16:56:41,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:56:45,839 WARN L539 Checker$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 16:56:49,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:56:53,886 WARN L539 Checker$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 16:56:57,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:57:02,002 WARN L539 Checker$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 16:57:06,024 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 16:57:06,256 INFO L124 PetriNetUnfolderBase]: 1635/2749 cut-off events. [2024-06-27 16:57:06,256 INFO L125 PetriNetUnfolderBase]: For 11204/11204 co-relation queries the response was YES. [2024-06-27 16:57:06,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13577 conditions, 2749 events. 1635/2749 cut-off events. For 11204/11204 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14519 event pairs, 36 based on Foata normal form. 2/2751 useless extension candidates. Maximal degree in co-relation 13513. Up to 1012 conditions per place. [2024-06-27 16:57:06,326 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 273 selfloop transitions, 259 changer transitions 6/539 dead transitions. [2024-06-27 16:57:06,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 539 transitions, 5596 flow [2024-06-27 16:57:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-06-27 16:57:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-06-27 16:57:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 601 transitions. [2024-06-27 16:57:06,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35269953051643194 [2024-06-27 16:57:06,331 INFO L175 Difference]: Start difference. First operand has 127 places, 151 transitions, 1733 flow. Second operand 71 states and 601 transitions. [2024-06-27 16:57:06,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 539 transitions, 5596 flow [2024-06-27 16:57:06,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 539 transitions, 5481 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-27 16:57:06,378 INFO L231 Difference]: Finished difference. Result has 215 places, 328 transitions, 4226 flow [2024-06-27 16:57:06,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=4226, PETRI_PLACES=215, PETRI_TRANSITIONS=328} [2024-06-27 16:57:06,379 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 190 predicate places. [2024-06-27 16:57:06,379 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 328 transitions, 4226 flow [2024-06-27 16:57:06,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.9) internal successors, (196), 40 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:06,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:06,379 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:06,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:06,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:06,592 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 16:57:06,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1204807217, now seen corresponding path program 13 times [2024-06-27 16:57:06,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:06,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084033937] [2024-06-27 16:57:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:06,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:07,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:07,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084033937] [2024-06-27 16:57:07,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084033937] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:07,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589185846] [2024-06-27 16:57:07,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:57:07,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:07,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:07,262 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 16:57:07,276 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 16:57:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:07,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:57:07,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:07,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:07,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:07,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:57:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589185846] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:07,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:07,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-06-27 16:57:07,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003362130] [2024-06-27 16:57:07,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:07,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:57:07,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:57:07,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:57:08,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:08,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 328 transitions, 4226 flow. Second operand has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 16:57:08,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:08,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:08,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:09,575 INFO L124 PetriNetUnfolderBase]: 1835/3086 cut-off events. [2024-06-27 16:57:09,575 INFO L125 PetriNetUnfolderBase]: For 38369/38369 co-relation queries the response was YES. [2024-06-27 16:57:09,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21077 conditions, 3086 events. 1835/3086 cut-off events. For 38369/38369 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16770 event pairs, 114 based on Foata normal form. 1/3087 useless extension candidates. Maximal degree in co-relation 20985. Up to 1874 conditions per place. [2024-06-27 16:57:09,600 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 270 selfloop transitions, 203 changer transitions 1/475 dead transitions. [2024-06-27 16:57:09,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 475 transitions, 6731 flow [2024-06-27 16:57:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:57:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:57:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 226 transitions. [2024-06-27 16:57:09,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-27 16:57:09,602 INFO L175 Difference]: Start difference. First operand has 215 places, 328 transitions, 4226 flow. Second operand 25 states and 226 transitions. [2024-06-27 16:57:09,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 475 transitions, 6731 flow [2024-06-27 16:57:09,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 475 transitions, 5906 flow, removed 341 selfloop flow, removed 18 redundant places. [2024-06-27 16:57:09,871 INFO L231 Difference]: Finished difference. Result has 228 places, 380 transitions, 4921 flow [2024-06-27 16:57:09,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4921, PETRI_PLACES=228, PETRI_TRANSITIONS=380} [2024-06-27 16:57:09,871 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 203 predicate places. [2024-06-27 16:57:09,871 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 380 transitions, 4921 flow [2024-06-27 16:57:09,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 16:57:09,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:09,872 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:09,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:10,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 16:57:10,072 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 16:57:10,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1255116393, now seen corresponding path program 14 times [2024-06-27 16:57:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:10,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737601748] [2024-06-27 16:57:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:10,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:10,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:10,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737601748] [2024-06-27 16:57:10,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737601748] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:10,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141766443] [2024-06-27 16:57:10,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:57:10,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:10,855 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:10,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 16:57:10,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:57:10,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:10,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:57:10,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:11,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:11,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:11,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:57:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:11,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141766443] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:11,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:11,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-06-27 16:57:11,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954458871] [2024-06-27 16:57:11,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:11,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:57:11,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:57:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:57:11,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:11,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 380 transitions, 4921 flow. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 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 16:57:11,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:11,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:11,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:13,528 INFO L124 PetriNetUnfolderBase]: 1948/3278 cut-off events. [2024-06-27 16:57:13,528 INFO L125 PetriNetUnfolderBase]: For 44086/44086 co-relation queries the response was YES. [2024-06-27 16:57:13,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23051 conditions, 3278 events. 1948/3278 cut-off events. For 44086/44086 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18099 event pairs, 123 based on Foata normal form. 1/3279 useless extension candidates. Maximal degree in co-relation 22952. Up to 2069 conditions per place. [2024-06-27 16:57:13,554 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 291 selfloop transitions, 206 changer transitions 1/499 dead transitions. [2024-06-27 16:57:13,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 499 transitions, 7167 flow [2024-06-27 16:57:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:57:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:57:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 206 transitions. [2024-06-27 16:57:13,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-27 16:57:13,556 INFO L175 Difference]: Start difference. First operand has 228 places, 380 transitions, 4921 flow. Second operand 22 states and 206 transitions. [2024-06-27 16:57:13,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 499 transitions, 7167 flow [2024-06-27 16:57:13,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 499 transitions, 7023 flow, removed 38 selfloop flow, removed 11 redundant places. [2024-06-27 16:57:13,730 INFO L231 Difference]: Finished difference. Result has 244 places, 409 transitions, 5944 flow [2024-06-27 16:57:13,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4805, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5944, PETRI_PLACES=244, PETRI_TRANSITIONS=409} [2024-06-27 16:57:13,731 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 219 predicate places. [2024-06-27 16:57:13,731 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 409 transitions, 5944 flow [2024-06-27 16:57:13,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 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 16:57:13,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:13,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:13,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-06-27 16:57:13,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:13,940 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 16:57:13,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:13,941 INFO L85 PathProgramCache]: Analyzing trace with hash 831525043, now seen corresponding path program 15 times [2024-06-27 16:57:13,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:13,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912597158] [2024-06-27 16:57:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:13,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:14,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:14,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912597158] [2024-06-27 16:57:14,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912597158] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:14,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955658349] [2024-06-27 16:57:14,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:57:14,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:14,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:14,701 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:14,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 16:57:14,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:57:14,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:14,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 16:57:14,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:14,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:57:15,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:15,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-06-27 16:57:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:15,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:15,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-06-27 16:57:15,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:15,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-06-27 16:57:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:16,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955658349] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:16,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:16,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2024-06-27 16:57:16,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348243181] [2024-06-27 16:57:16,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:16,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-06-27 16:57:16,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-06-27 16:57:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2024-06-27 16:57:16,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:57:16,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 409 transitions, 5944 flow. Second operand has 40 states, 40 states have (on average 5.575) internal successors, (223), 40 states have internal predecessors, (223), 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 16:57:16,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:16,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:57:16,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:18,317 INFO L124 PetriNetUnfolderBase]: 1707/3047 cut-off events. [2024-06-27 16:57:18,317 INFO L125 PetriNetUnfolderBase]: For 45821/46431 co-relation queries the response was YES. [2024-06-27 16:57:18,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22871 conditions, 3047 events. 1707/3047 cut-off events. For 45821/46431 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18414 event pairs, 115 based on Foata normal form. 99/3140 useless extension candidates. Maximal degree in co-relation 22764. Up to 1769 conditions per place. [2024-06-27 16:57:18,353 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 256 selfloop transitions, 273 changer transitions 3/548 dead transitions. [2024-06-27 16:57:18,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 548 transitions, 8544 flow [2024-06-27 16:57:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 16:57:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 16:57:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 280 transitions. [2024-06-27 16:57:18,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-27 16:57:18,355 INFO L175 Difference]: Start difference. First operand has 244 places, 409 transitions, 5944 flow. Second operand 32 states and 280 transitions. [2024-06-27 16:57:18,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 548 transitions, 8544 flow [2024-06-27 16:57:18,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 548 transitions, 8414 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-27 16:57:18,667 INFO L231 Difference]: Finished difference. Result has 279 places, 462 transitions, 7675 flow [2024-06-27 16:57:18,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7675, PETRI_PLACES=279, PETRI_TRANSITIONS=462} [2024-06-27 16:57:18,670 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 254 predicate places. [2024-06-27 16:57:18,670 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 462 transitions, 7675 flow [2024-06-27 16:57:18,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.575) internal successors, (223), 40 states have internal predecessors, (223), 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 16:57:18,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:18,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:18,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-06-27 16:57:18,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:18,872 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:18,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash 695756683, now seen corresponding path program 16 times [2024-06-27 16:57:18,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:18,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607037169] [2024-06-27 16:57:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:18,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:19,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607037169] [2024-06-27 16:57:19,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607037169] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831966404] [2024-06-27 16:57:19,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:57:19,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:19,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:19,624 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:19,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 16:57:19,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:57:19,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:19,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:57:19,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:19,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:20,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:20,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:57:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:20,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831966404] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:20,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:20,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-06-27 16:57:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173830577] [2024-06-27 16:57:20,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:20,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:57:20,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:57:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:57:20,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:20,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 462 transitions, 7675 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:20,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:20,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:20,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:22,302 INFO L124 PetriNetUnfolderBase]: 2289/3859 cut-off events. [2024-06-27 16:57:22,303 INFO L125 PetriNetUnfolderBase]: For 69056/69056 co-relation queries the response was YES. [2024-06-27 16:57:22,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31040 conditions, 3859 events. 2289/3859 cut-off events. For 69056/69056 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 22145 event pairs, 167 based on Foata normal form. 1/3860 useless extension candidates. Maximal degree in co-relation 30922. Up to 2476 conditions per place. [2024-06-27 16:57:22,344 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 316 selfloop transitions, 299 changer transitions 1/617 dead transitions. [2024-06-27 16:57:22,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 617 transitions, 10761 flow [2024-06-27 16:57:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:57:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:57:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 246 transitions. [2024-06-27 16:57:22,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416666666666667 [2024-06-27 16:57:22,346 INFO L175 Difference]: Start difference. First operand has 279 places, 462 transitions, 7675 flow. Second operand 30 states and 246 transitions. [2024-06-27 16:57:22,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 617 transitions, 10761 flow [2024-06-27 16:57:22,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 617 transitions, 10522 flow, removed 53 selfloop flow, removed 19 redundant places. [2024-06-27 16:57:22,646 INFO L231 Difference]: Finished difference. Result has 297 places, 526 transitions, 9733 flow [2024-06-27 16:57:22,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7495, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9733, PETRI_PLACES=297, PETRI_TRANSITIONS=526} [2024-06-27 16:57:22,647 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 272 predicate places. [2024-06-27 16:57:22,647 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 526 transitions, 9733 flow [2024-06-27 16:57:22,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:22,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:22,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:22,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:22,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:22,849 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:22,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash 490457543, now seen corresponding path program 17 times [2024-06-27 16:57:22,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:22,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931105169] [2024-06-27 16:57:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:22,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931105169] [2024-06-27 16:57:23,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931105169] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299584102] [2024-06-27 16:57:23,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:57:23,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:23,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:23,589 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:23,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 16:57:23,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:57:23,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:23,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:57:23,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:23,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:24,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:24,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:57:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299584102] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:24,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:24,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-06-27 16:57:24,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052746764] [2024-06-27 16:57:24,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:24,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:57:24,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:24,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:57:24,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:57:24,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:24,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 526 transitions, 9733 flow. Second operand has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 16:57:24,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:24,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:24,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:26,307 INFO L124 PetriNetUnfolderBase]: 2513/4223 cut-off events. [2024-06-27 16:57:26,307 INFO L125 PetriNetUnfolderBase]: For 88232/88232 co-relation queries the response was YES. [2024-06-27 16:57:26,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36440 conditions, 4223 events. 2513/4223 cut-off events. For 88232/88232 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 24550 event pairs, 195 based on Foata normal form. 1/4224 useless extension candidates. Maximal degree in co-relation 36314. Up to 2701 conditions per place. [2024-06-27 16:57:26,352 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 381 selfloop transitions, 298 changer transitions 1/681 dead transitions. [2024-06-27 16:57:26,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 681 transitions, 13167 flow [2024-06-27 16:57:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 16:57:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 16:57:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 275 transitions. [2024-06-27 16:57:26,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580729166666667 [2024-06-27 16:57:26,355 INFO L175 Difference]: Start difference. First operand has 297 places, 526 transitions, 9733 flow. Second operand 32 states and 275 transitions. [2024-06-27 16:57:26,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 681 transitions, 13167 flow [2024-06-27 16:57:26,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 681 transitions, 12958 flow, removed 83 selfloop flow, removed 13 redundant places. [2024-06-27 16:57:26,723 INFO L231 Difference]: Finished difference. Result has 323 places, 579 transitions, 11704 flow [2024-06-27 16:57:26,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9554, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11704, PETRI_PLACES=323, PETRI_TRANSITIONS=579} [2024-06-27 16:57:26,723 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 298 predicate places. [2024-06-27 16:57:26,724 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 579 transitions, 11704 flow [2024-06-27 16:57:26,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 16:57:26,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:26,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:26,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:26,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:26,925 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:26,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash -686518265, now seen corresponding path program 18 times [2024-06-27 16:57:26,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:26,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163595613] [2024-06-27 16:57:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:26,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:27,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:27,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163595613] [2024-06-27 16:57:27,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163595613] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:27,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963027515] [2024-06-27 16:57:27,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:57:27,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:27,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:27,619 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:27,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 16:57:27,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:57:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:27,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:57:27,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:27,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:28,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:28,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:57:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:28,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963027515] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:28,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:28,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-06-27 16:57:28,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154207081] [2024-06-27 16:57:28,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:28,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:57:28,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:28,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:57:28,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:57:28,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:28,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 579 transitions, 11704 flow. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 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 16:57:28,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:28,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:28,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:30,223 INFO L124 PetriNetUnfolderBase]: 2668/4482 cut-off events. [2024-06-27 16:57:30,224 INFO L125 PetriNetUnfolderBase]: For 109171/109171 co-relation queries the response was YES. [2024-06-27 16:57:30,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41250 conditions, 4482 events. 2668/4482 cut-off events. For 109171/109171 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26415 event pairs, 221 based on Foata normal form. 1/4483 useless extension candidates. Maximal degree in co-relation 41116. Up to 3001 conditions per place. [2024-06-27 16:57:30,273 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 395 selfloop transitions, 305 changer transitions 1/702 dead transitions. [2024-06-27 16:57:30,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 702 transitions, 14773 flow [2024-06-27 16:57:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:57:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:57:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 231 transitions. [2024-06-27 16:57:30,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35648148148148145 [2024-06-27 16:57:30,275 INFO L175 Difference]: Start difference. First operand has 323 places, 579 transitions, 11704 flow. Second operand 27 states and 231 transitions. [2024-06-27 16:57:30,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 702 transitions, 14773 flow [2024-06-27 16:57:30,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 702 transitions, 14537 flow, removed 78 selfloop flow, removed 16 redundant places. [2024-06-27 16:57:30,848 INFO L231 Difference]: Finished difference. Result has 339 places, 611 transitions, 13338 flow [2024-06-27 16:57:30,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=11472, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13338, PETRI_PLACES=339, PETRI_TRANSITIONS=611} [2024-06-27 16:57:30,849 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 314 predicate places. [2024-06-27 16:57:30,850 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 611 transitions, 13338 flow [2024-06-27 16:57:30,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 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 16:57:30,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:30,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:30,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:31,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-06-27 16:57:31,051 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:31,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash -459401981, now seen corresponding path program 19 times [2024-06-27 16:57:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:31,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468460887] [2024-06-27 16:57:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:31,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:31,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:31,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468460887] [2024-06-27 16:57:31,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468460887] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:31,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586831349] [2024-06-27 16:57:31,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:57:31,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:31,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:31,736 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:31,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 16:57:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:31,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:57:31,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:31,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:32,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:32,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:57:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:32,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586831349] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:32,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:32,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-06-27 16:57:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610260226] [2024-06-27 16:57:32,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:32,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:57:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:57:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:57:32,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:32,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 611 transitions, 13338 flow. Second operand has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 16:57:32,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:32,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:32,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:34,518 INFO L124 PetriNetUnfolderBase]: 2815/4727 cut-off events. [2024-06-27 16:57:34,518 INFO L125 PetriNetUnfolderBase]: For 133838/133838 co-relation queries the response was YES. [2024-06-27 16:57:34,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46013 conditions, 4727 events. 2815/4727 cut-off events. For 133838/133838 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28010 event pairs, 242 based on Foata normal form. 1/4728 useless extension candidates. Maximal degree in co-relation 45871. Up to 3021 conditions per place. [2024-06-27 16:57:34,577 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 419 selfloop transitions, 318 changer transitions 1/739 dead transitions. [2024-06-27 16:57:34,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 739 transitions, 16442 flow [2024-06-27 16:57:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:57:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:57:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 274 transitions. [2024-06-27 16:57:34,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-27 16:57:34,579 INFO L175 Difference]: Start difference. First operand has 339 places, 611 transitions, 13338 flow. Second operand 31 states and 274 transitions. [2024-06-27 16:57:34,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 739 transitions, 16442 flow [2024-06-27 16:57:35,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 739 transitions, 16233 flow, removed 60 selfloop flow, removed 14 redundant places. [2024-06-27 16:57:35,172 INFO L231 Difference]: Finished difference. Result has 360 places, 629 transitions, 14718 flow [2024-06-27 16:57:35,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13131, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14718, PETRI_PLACES=360, PETRI_TRANSITIONS=629} [2024-06-27 16:57:35,173 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2024-06-27 16:57:35,173 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 629 transitions, 14718 flow [2024-06-27 16:57:35,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 16:57:35,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:35,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:35,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:35,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 16:57:35,374 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:35,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1267150047, now seen corresponding path program 20 times [2024-06-27 16:57:35,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:35,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021944425] [2024-06-27 16:57:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:35,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:35,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:35,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021944425] [2024-06-27 16:57:35,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021944425] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:35,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363461006] [2024-06-27 16:57:35,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:57:35,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:35,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:35,971 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:35,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 16:57:36,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:57:36,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:36,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:57:36,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:36,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:36,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:36,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:57:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:36,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363461006] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:36,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:36,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-06-27 16:57:36,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415963678] [2024-06-27 16:57:36,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:36,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:57:36,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:36,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:57:36,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:57:36,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:36,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 629 transitions, 14718 flow. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 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 16:57:36,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:36,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:36,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:39,278 INFO L124 PetriNetUnfolderBase]: 3074/5161 cut-off events. [2024-06-27 16:57:39,279 INFO L125 PetriNetUnfolderBase]: For 167584/167584 co-relation queries the response was YES. [2024-06-27 16:57:39,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53017 conditions, 5161 events. 3074/5161 cut-off events. For 167584/167584 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30678 event pairs, 279 based on Foata normal form. 2/5163 useless extension candidates. Maximal degree in co-relation 52869. Up to 3231 conditions per place. [2024-06-27 16:57:39,336 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 417 selfloop transitions, 361 changer transitions 2/781 dead transitions. [2024-06-27 16:57:39,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 781 transitions, 18702 flow [2024-06-27 16:57:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:57:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:57:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 273 transitions. [2024-06-27 16:57:39,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-27 16:57:39,338 INFO L175 Difference]: Start difference. First operand has 360 places, 629 transitions, 14718 flow. Second operand 31 states and 273 transitions. [2024-06-27 16:57:39,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 781 transitions, 18702 flow [2024-06-27 16:57:40,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 781 transitions, 18487 flow, removed 30 selfloop flow, removed 23 redundant places. [2024-06-27 16:57:40,036 INFO L231 Difference]: Finished difference. Result has 380 places, 675 transitions, 17146 flow [2024-06-27 16:57:40,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=14506, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17146, PETRI_PLACES=380, PETRI_TRANSITIONS=675} [2024-06-27 16:57:40,037 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 355 predicate places. [2024-06-27 16:57:40,037 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 675 transitions, 17146 flow [2024-06-27 16:57:40,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 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 16:57:40,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:40,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:40,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-06-27 16:57:40,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:40,241 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:40,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:40,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1261943581, now seen corresponding path program 21 times [2024-06-27 16:57:40,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:40,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932672500] [2024-06-27 16:57:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:40,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:40,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932672500] [2024-06-27 16:57:40,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932672500] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:40,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366242802] [2024-06-27 16:57:40,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:57:40,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:40,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:40,910 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:40,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 16:57:40,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:57:40,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:40,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 16:57:40,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:41,057 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 19 treesize of output 1 [2024-06-27 16:57:41,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:41,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-06-27 16:57:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:41,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:42,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-06-27 16:57:42,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:42,089 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 82 treesize of output 66 [2024-06-27 16:57:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:42,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366242802] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:42,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:42,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 43 [2024-06-27 16:57:42,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419980543] [2024-06-27 16:57:42,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:42,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-06-27 16:57:42,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-06-27 16:57:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2024-06-27 16:57:42,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:42,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 675 transitions, 17146 flow. Second operand has 44 states, 44 states have (on average 4.590909090909091) internal successors, (202), 44 states have internal predecessors, (202), 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 16:57:42,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:42,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:42,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:46,866 INFO L124 PetriNetUnfolderBase]: 3710/6259 cut-off events. [2024-06-27 16:57:46,866 INFO L125 PetriNetUnfolderBase]: For 254767/254767 co-relation queries the response was YES. [2024-06-27 16:57:46,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69232 conditions, 6259 events. 3710/6259 cut-off events. For 254767/254767 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 38892 event pairs, 171 based on Foata normal form. 2/6261 useless extension candidates. Maximal degree in co-relation 69071. Up to 2507 conditions per place. [2024-06-27 16:57:46,934 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 352 selfloop transitions, 779 changer transitions 9/1141 dead transitions. [2024-06-27 16:57:46,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1141 transitions, 29855 flow [2024-06-27 16:57:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-06-27 16:57:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-06-27 16:57:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 468 transitions. [2024-06-27 16:57:46,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31451612903225806 [2024-06-27 16:57:46,936 INFO L175 Difference]: Start difference. First operand has 380 places, 675 transitions, 17146 flow. Second operand 62 states and 468 transitions. [2024-06-27 16:57:46,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1141 transitions, 29855 flow [2024-06-27 16:57:48,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1141 transitions, 29435 flow, removed 162 selfloop flow, removed 15 redundant places. [2024-06-27 16:57:48,132 INFO L231 Difference]: Finished difference. Result has 448 places, 978 transitions, 27773 flow [2024-06-27 16:57:48,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=16812, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=27773, PETRI_PLACES=448, PETRI_TRANSITIONS=978} [2024-06-27 16:57:48,133 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 423 predicate places. [2024-06-27 16:57:48,133 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 978 transitions, 27773 flow [2024-06-27 16:57:48,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.590909090909091) internal successors, (202), 44 states have internal predecessors, (202), 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 16:57:48,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:48,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:48,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:48,334 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:48,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1434236265, now seen corresponding path program 22 times [2024-06-27 16:57:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:48,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753361572] [2024-06-27 16:57:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:48,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:48,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753361572] [2024-06-27 16:57:48,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753361572] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:48,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846039065] [2024-06-27 16:57:48,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:57:48,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:48,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:48,988 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:48,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 16:57:49,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:57:49,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:49,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:57:49,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:49,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:49,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:49,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:57:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:49,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846039065] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:49,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:49,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-06-27 16:57:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360010531] [2024-06-27 16:57:49,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:49,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:57:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:49,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:57:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:57:49,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:49,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 978 transitions, 27773 flow. Second operand has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 16:57:49,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:49,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:49,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:52,935 INFO L124 PetriNetUnfolderBase]: 3806/6407 cut-off events. [2024-06-27 16:57:52,935 INFO L125 PetriNetUnfolderBase]: For 291310/291310 co-relation queries the response was YES. [2024-06-27 16:57:53,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78172 conditions, 6407 events. 3806/6407 cut-off events. For 291310/291310 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 40025 event pairs, 251 based on Foata normal form. 1/6408 useless extension candidates. Maximal degree in co-relation 78018. Up to 4514 conditions per place. [2024-06-27 16:57:53,130 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 649 selfloop transitions, 439 changer transitions 1/1090 dead transitions. [2024-06-27 16:57:53,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1090 transitions, 32123 flow [2024-06-27 16:57:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:57:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:57:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 180 transitions. [2024-06-27 16:57:53,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-06-27 16:57:53,133 INFO L175 Difference]: Start difference. First operand has 448 places, 978 transitions, 27773 flow. Second operand 19 states and 180 transitions. [2024-06-27 16:57:53,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1090 transitions, 32123 flow [2024-06-27 16:57:55,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 1090 transitions, 30650 flow, removed 656 selfloop flow, removed 20 redundant places. [2024-06-27 16:57:55,249 INFO L231 Difference]: Finished difference. Result has 448 places, 998 transitions, 28510 flow [2024-06-27 16:57:55,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=26411, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=28510, PETRI_PLACES=448, PETRI_TRANSITIONS=998} [2024-06-27 16:57:55,250 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 423 predicate places. [2024-06-27 16:57:55,250 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 998 transitions, 28510 flow [2024-06-27 16:57:55,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 16:57:55,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:55,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:55,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-06-27 16:57:55,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 16:57:55,456 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:55,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1435191273, now seen corresponding path program 23 times [2024-06-27 16:57:55,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:55,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163977633] [2024-06-27 16:57:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:56,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:56,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163977633] [2024-06-27 16:57:56,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163977633] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:56,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786339620] [2024-06-27 16:57:56,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:57:56,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:56,105 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:56,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 16:57:56,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:57:56,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:56,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:57:56,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:57:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:57:56,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:56,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 33 [2024-06-27 16:57:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:56,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:57,051 INFO L349 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2024-06-27 16:57:57,052 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 34 treesize of output 33 [2024-06-27 16:57:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:57,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786339620] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:57,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:57,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 37 [2024-06-27 16:57:57,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930156980] [2024-06-27 16:57:57,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:57,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 16:57:57,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:57,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 16:57:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 16:57:57,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:57:57,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 998 transitions, 28510 flow. Second operand has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:57,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:57,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:57:57,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:06,818 INFO L124 PetriNetUnfolderBase]: 5746/9527 cut-off events. [2024-06-27 16:58:06,818 INFO L125 PetriNetUnfolderBase]: For 520897/520897 co-relation queries the response was YES. [2024-06-27 16:58:06,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120077 conditions, 9527 events. 5746/9527 cut-off events. For 520897/520897 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 63408 event pairs, 135 based on Foata normal form. 1/9528 useless extension candidates. Maximal degree in co-relation 119893. Up to 4152 conditions per place. [2024-06-27 16:58:06,937 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 598 selfloop transitions, 1366 changer transitions 5/1970 dead transitions. [2024-06-27 16:58:06,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1970 transitions, 59880 flow [2024-06-27 16:58:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-06-27 16:58:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-06-27 16:58:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 687 transitions. [2024-06-27 16:58:06,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3328488372093023 [2024-06-27 16:58:06,939 INFO L175 Difference]: Start difference. First operand has 448 places, 998 transitions, 28510 flow. Second operand 86 states and 687 transitions. [2024-06-27 16:58:06,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1970 transitions, 59880 flow [2024-06-27 16:58:10,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 1970 transitions, 59671 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-06-27 16:58:10,561 INFO L231 Difference]: Finished difference. Result has 545 places, 1782 transitions, 58464 flow [2024-06-27 16:58:10,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=28361, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=670, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=58464, PETRI_PLACES=545, PETRI_TRANSITIONS=1782} [2024-06-27 16:58:10,563 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 520 predicate places. [2024-06-27 16:58:10,563 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 1782 transitions, 58464 flow [2024-06-27 16:58:10,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:10,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:10,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:10,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-06-27 16:58:10,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 16:58:10,779 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:58:10,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:10,780 INFO L85 PathProgramCache]: Analyzing trace with hash 249925379, now seen corresponding path program 24 times [2024-06-27 16:58:10,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:10,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903798156] [2024-06-27 16:58:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:10,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:11,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:11,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903798156] [2024-06-27 16:58:11,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903798156] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:11,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013448131] [2024-06-27 16:58:11,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:58:11,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:11,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:11,372 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:58:11,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 16:58:11,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:58:11,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:11,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 16:58:11,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:11,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:58:11,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:11,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-06-27 16:58:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:11,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:12,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-06-27 16:58:12,384 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:12,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-06-27 16:58:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:12,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013448131] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:12,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:12,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2024-06-27 16:58:12,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653935434] [2024-06-27 16:58:12,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-06-27 16:58:12,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-06-27 16:58:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1206, Unknown=0, NotChecked=0, Total=1482 [2024-06-27 16:58:12,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:58:12,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1782 transitions, 58464 flow. Second operand has 39 states, 39 states have (on average 5.589743589743589) internal successors, (218), 39 states have internal predecessors, (218), 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 16:58:12,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:12,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:58:12,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:19,759 INFO L124 PetriNetUnfolderBase]: 5915/10112 cut-off events. [2024-06-27 16:58:19,760 INFO L125 PetriNetUnfolderBase]: For 647747/648014 co-relation queries the response was YES. [2024-06-27 16:58:19,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144487 conditions, 10112 events. 5915/10112 cut-off events. For 647747/648014 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 71512 event pairs, 139 based on Foata normal form. 92/10168 useless extension candidates. Maximal degree in co-relation 144279. Up to 6270 conditions per place. [2024-06-27 16:58:19,907 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 969 selfloop transitions, 948 changer transitions 3/2178 dead transitions. [2024-06-27 16:58:19,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 2178 transitions, 74446 flow [2024-06-27 16:58:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:58:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:58:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 269 transitions. [2024-06-27 16:58:19,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736111111111111 [2024-06-27 16:58:19,908 INFO L175 Difference]: Start difference. First operand has 545 places, 1782 transitions, 58464 flow. Second operand 30 states and 269 transitions. [2024-06-27 16:58:19,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 2178 transitions, 74446 flow [2024-06-27 16:58:26,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 2178 transitions, 70829 flow, removed 1707 selfloop flow, removed 25 redundant places. [2024-06-27 16:58:26,179 INFO L231 Difference]: Finished difference. Result has 559 places, 2096 transitions, 69459 flow [2024-06-27 16:58:26,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=55336, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=69459, PETRI_PLACES=559, PETRI_TRANSITIONS=2096} [2024-06-27 16:58:26,181 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 534 predicate places. [2024-06-27 16:58:26,181 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 2096 transitions, 69459 flow [2024-06-27 16:58:26,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.589743589743589) internal successors, (218), 39 states have internal predecessors, (218), 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 16:58:26,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:26,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:26,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-06-27 16:58:26,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 16:58:26,383 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:58:26,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash -325339505, now seen corresponding path program 25 times [2024-06-27 16:58:26,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:26,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999260237] [2024-06-27 16:58:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:26,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:27,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999260237] [2024-06-27 16:58:27,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999260237] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:27,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487849507] [2024-06-27 16:58:27,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:58:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:27,012 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:58:27,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 16:58:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:27,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:58:27,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:27,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:27,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:27,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:58:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:27,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487849507] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:27,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:27,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-06-27 16:58:27,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548014613] [2024-06-27 16:58:27,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:27,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:58:27,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:58:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:58:27,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-06-27 16:58:27,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 2096 transitions, 69459 flow. Second operand has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:27,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:27,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-06-27 16:58:27,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:35,071 INFO L124 PetriNetUnfolderBase]: 6126/10495 cut-off events. [2024-06-27 16:58:35,071 INFO L125 PetriNetUnfolderBase]: For 678085/678323 co-relation queries the response was YES. [2024-06-27 16:58:35,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151087 conditions, 10495 events. 6126/10495 cut-off events. For 678085/678323 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 74184 event pairs, 192 based on Foata normal form. 46/10515 useless extension candidates. Maximal degree in co-relation 150871. Up to 8707 conditions per place. [2024-06-27 16:58:35,479 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 1910 selfloop transitions, 245 changer transitions 3/2247 dead transitions. [2024-06-27 16:58:35,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 2247 transitions, 78100 flow [2024-06-27 16:58:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:58:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:58:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 254 transitions. [2024-06-27 16:58:35,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 16:58:35,480 INFO L175 Difference]: Start difference. First operand has 559 places, 2096 transitions, 69459 flow. Second operand 28 states and 254 transitions. [2024-06-27 16:58:35,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 2247 transitions, 78100 flow [2024-06-27 16:58:42,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 2247 transitions, 77693 flow, removed 155 selfloop flow, removed 14 redundant places. [2024-06-27 16:58:42,850 INFO L231 Difference]: Finished difference. Result has 576 places, 2166 transitions, 72630 flow [2024-06-27 16:58:42,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=69054, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1858, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=72630, PETRI_PLACES=576, PETRI_TRANSITIONS=2166} [2024-06-27 16:58:42,853 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 551 predicate places. [2024-06-27 16:58:42,853 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 2166 transitions, 72630 flow [2024-06-27 16:58:42,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:42,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:42,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:42,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 16:58:43,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:43,059 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:58:43,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2056040199, now seen corresponding path program 26 times [2024-06-27 16:58:43,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:43,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800915405] [2024-06-27 16:58:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:43,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:43,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:43,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800915405] [2024-06-27 16:58:43,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800915405] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:43,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532774827] [2024-06-27 16:58:43,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:58:43,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:43,751 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:58:43,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 16:58:43,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:58:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:43,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:58:43,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:58:44,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:44,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:44,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-06-27 16:58:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:44,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532774827] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:44,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:44,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-06-27 16:58:44,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871220130] [2024-06-27 16:58:44,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:44,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:58:44,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:58:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:58:44,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-06-27 16:58:44,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 2166 transitions, 72630 flow. Second operand has 33 states, 33 states have (on average 5.121212121212121) internal successors, (169), 33 states have internal predecessors, (169), 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 16:58:44,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:44,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-06-27 16:58:44,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand