./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:08:31,430 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:08:31,473 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:08:31,477 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:08:31,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:08:31,501 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:08:31,501 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:08:31,502 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:08:31,502 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:08:31,503 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:08:31,503 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:08:31,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:08:31,504 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:08:31,504 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:08:31,505 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:08:31,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:08:31,506 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:08:31,506 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:08:31,506 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:08:31,507 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:08:31,507 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:08:31,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:08:31,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:08:31,508 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:08:31,508 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:08:31,508 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:08:31,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:08:31,509 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:08:31,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:08:31,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:08:31,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:08:31,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:08:31,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:08:31,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:08:31,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:08:31,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:08:31,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:08:31,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:08:31,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:08:31,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:08:31,512 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:08:31,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:08:31,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:08:31,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:08:31,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:08:31,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:08:31,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:08:31,741 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:08:31,742 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:08:31,744 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2024-02-20 12:08:33,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:08:33,380 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:08:33,381 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2024-02-20 12:08:33,388 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d795f7f6/acad754d9a444902a32d0391207227cb/FLAGe7993c645 [2024-02-20 12:08:33,403 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d795f7f6/acad754d9a444902a32d0391207227cb [2024-02-20 12:08:33,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:08:33,408 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:08:33,410 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:08:33,410 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:08:33,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:08:33,415 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,416 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75162313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33, skipping insertion in model container [2024-02-20 12:08:33,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,443 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:08:33,614 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2024-02-20 12:08:33,622 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:08:33,634 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:08:33,669 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2024-02-20 12:08:33,672 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:08:33,688 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:08:33,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33 WrapperNode [2024-02-20 12:08:33,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:08:33,690 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:08:33,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:08:33,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:08:33,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,704 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,725 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 155 [2024-02-20 12:08:33,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:08:33,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:08:33,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:08:33,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:08:33,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,741 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,755 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-20 12:08:33,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,756 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,767 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,768 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:08:33,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:08:33,771 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:08:33,771 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:08:33,772 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (1/1) ... [2024-02-20 12:08:33,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:08:33,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:33,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 12:08:33,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 12:08:33,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:08:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:08:33,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:08:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:08:33,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:08:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:08:33,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:08:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:08:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 12:08:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:08:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:08:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:08:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:08:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 12:08:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:08:33,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:08:33,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-20 12:08:33,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:08:33,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:08:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:08:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:08:33,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:08:33,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 12:08:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:08:33,898 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:08:34,034 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:08:34,037 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:08:34,258 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:08:34,258 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:08:34,366 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:08:34,366 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-20 12:08:34,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:08:34 BoogieIcfgContainer [2024-02-20 12:08:34,367 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:08:34,368 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:08:34,369 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:08:34,372 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:08:34,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:08:33" (1/3) ... [2024-02-20 12:08:34,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732aa24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:08:34, skipping insertion in model container [2024-02-20 12:08:34,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:08:33" (2/3) ... [2024-02-20 12:08:34,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732aa24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:08:34, skipping insertion in model container [2024-02-20 12:08:34,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:08:34" (3/3) ... [2024-02-20 12:08:34,374 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-02-20 12:08:34,389 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:08:34,390 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:08:34,390 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:08:34,421 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 12:08:34,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 80 flow [2024-02-20 12:08:34,483 INFO L124 PetriNetUnfolderBase]: 5/31 cut-off events. [2024-02-20 12:08:34,483 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:08:34,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 5/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-02-20 12:08:34,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 80 flow [2024-02-20 12:08:34,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 72 flow [2024-02-20 12:08:34,496 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:08:34,503 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56a8d539, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:08:34,503 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 12:08:34,513 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:08:34,514 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-02-20 12:08:34,514 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:08:34,514 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:34,515 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:34,516 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:34,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash -214659704, now seen corresponding path program 1 times [2024-02-20 12:08:34,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:34,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918159553] [2024-02-20 12:08:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:34,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:34,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:34,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918159553] [2024-02-20 12:08:34,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918159553] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:08:34,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:08:34,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:08:34,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670701142] [2024-02-20 12:08:34,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:08:34,733 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-20 12:08:34,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:34,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-20 12:08:34,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-20 12:08:34,760 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:08:34,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:34,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:34,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:08:34,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:34,826 INFO L124 PetriNetUnfolderBase]: 92/198 cut-off events. [2024-02-20 12:08:34,826 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-02-20 12:08:34,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 198 events. 92/198 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 766 event pairs, 69 based on Foata normal form. 13/167 useless extension candidates. Maximal degree in co-relation 275. Up to 163 conditions per place. [2024-02-20 12:08:34,830 INFO L140 encePairwiseOnDemand]: 32/33 looper letters, 21 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-02-20 12:08:34,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 112 flow [2024-02-20 12:08:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-20 12:08:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-20 12:08:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 42 transitions. [2024-02-20 12:08:34,841 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-02-20 12:08:34,846 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-02-20 12:08:34,846 INFO L507 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 112 flow [2024-02-20 12:08:34,847 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:34,847 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:34,847 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:34,847 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:08:34,848 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:34,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1326957284, now seen corresponding path program 1 times [2024-02-20 12:08:34,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:34,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165689701] [2024-02-20 12:08:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:34,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:34,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:34,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165689701] [2024-02-20 12:08:34,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165689701] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:08:34,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:08:34,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:08:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240959220] [2024-02-20 12:08:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:08:34,981 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:08:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:08:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:08:34,982 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:08:34,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:34,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:34,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:08:34,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:35,057 INFO L124 PetriNetUnfolderBase]: 160/317 cut-off events. [2024-02-20 12:08:35,058 INFO L125 PetriNetUnfolderBase]: For 85/99 co-relation queries the response was YES. [2024-02-20 12:08:35,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 317 events. 160/317 cut-off events. For 85/99 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1362 event pairs, 73 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 611. Up to 268 conditions per place. [2024-02-20 12:08:35,060 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 32 selfloop transitions, 2 changer transitions 3/45 dead transitions. [2024-02-20 12:08:35,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 259 flow [2024-02-20 12:08:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:08:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:08:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-02-20 12:08:35,062 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6868686868686869 [2024-02-20 12:08:35,063 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2024-02-20 12:08:35,063 INFO L507 AbstractCegarLoop]: Abstraction has has 35 places, 45 transitions, 259 flow [2024-02-20 12:08:35,063 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:35,063 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:35,064 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:35,064 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:08:35,064 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:35,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1272265724, now seen corresponding path program 1 times [2024-02-20 12:08:35,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:35,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932385336] [2024-02-20 12:08:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:35,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:35,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932385336] [2024-02-20 12:08:35,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932385336] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:08:35,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:08:35,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:08:35,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980654643] [2024-02-20 12:08:35,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:08:35,188 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:08:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:08:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:08:35,189 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:08:35,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 45 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:35,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:35,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:08:35,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:35,311 INFO L124 PetriNetUnfolderBase]: 177/364 cut-off events. [2024-02-20 12:08:35,311 INFO L125 PetriNetUnfolderBase]: For 181/229 co-relation queries the response was YES. [2024-02-20 12:08:35,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 364 events. 177/364 cut-off events. For 181/229 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1705 event pairs, 66 based on Foata normal form. 6/293 useless extension candidates. Maximal degree in co-relation 781. Up to 316 conditions per place. [2024-02-20 12:08:35,314 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 33 selfloop transitions, 2 changer transitions 15/58 dead transitions. [2024-02-20 12:08:35,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 58 transitions, 449 flow [2024-02-20 12:08:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:08:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:08:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-02-20 12:08:35,315 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-02-20 12:08:35,316 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-02-20 12:08:35,316 INFO L507 AbstractCegarLoop]: Abstraction has has 38 places, 58 transitions, 449 flow [2024-02-20 12:08:35,316 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:35,316 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:35,317 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:35,317 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 12:08:35,317 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:35,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash 330455003, now seen corresponding path program 1 times [2024-02-20 12:08:35,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:35,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793918916] [2024-02-20 12:08:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:35,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:08:35,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:35,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793918916] [2024-02-20 12:08:35,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793918916] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:08:35,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:08:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:08:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506209408] [2024-02-20 12:08:35,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:08:35,511 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:08:35,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:08:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:08:35,517 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-02-20 12:08:35,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 58 transitions, 449 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:35,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:35,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-02-20 12:08:35,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:35,683 INFO L124 PetriNetUnfolderBase]: 280/542 cut-off events. [2024-02-20 12:08:35,683 INFO L125 PetriNetUnfolderBase]: For 717/793 co-relation queries the response was YES. [2024-02-20 12:08:35,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 542 events. 280/542 cut-off events. For 717/793 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2408 event pairs, 9 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 1978. Up to 448 conditions per place. [2024-02-20 12:08:35,692 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 45 selfloop transitions, 6 changer transitions 30/87 dead transitions. [2024-02-20 12:08:35,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 87 transitions, 846 flow [2024-02-20 12:08:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:08:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:08:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-02-20 12:08:35,699 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-02-20 12:08:35,702 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2024-02-20 12:08:35,702 INFO L507 AbstractCegarLoop]: Abstraction has has 41 places, 87 transitions, 846 flow [2024-02-20 12:08:35,702 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:35,702 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:35,703 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:35,703 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 12:08:35,703 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:35,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash 413549840, now seen corresponding path program 1 times [2024-02-20 12:08:35,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:35,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583767584] [2024-02-20 12:08:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:35,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:08:35,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583767584] [2024-02-20 12:08:35,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583767584] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38043279] [2024-02-20 12:08:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:35,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:35,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:35,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:08:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:35,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2024-02-20 12:08:35,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:36,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-20 12:08:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:36,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:36,617 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 61 treesize of output 55 [2024-02-20 12:08:36,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:08:36,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-02-20 12:08:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:36,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38043279] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:36,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:36,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2024-02-20 12:08:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485424581] [2024-02-20 12:08:36,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:36,752 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 12:08:36,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 12:08:36,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-02-20 12:08:36,800 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-02-20 12:08:36,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 87 transitions, 846 flow. Second operand has 17 states, 17 states have (on average 11.705882352941176) internal successors, (199), 17 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:36,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:36,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-02-20 12:08:36,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:38,592 INFO L124 PetriNetUnfolderBase]: 1148/2239 cut-off events. [2024-02-20 12:08:38,593 INFO L125 PetriNetUnfolderBase]: For 3675/3879 co-relation queries the response was YES. [2024-02-20 12:08:38,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11745 conditions, 2239 events. 1148/2239 cut-off events. For 3675/3879 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13694 event pairs, 77 based on Foata normal form. 20/1923 useless extension candidates. Maximal degree in co-relation 5913. Up to 1797 conditions per place. [2024-02-20 12:08:38,608 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 129 selfloop transitions, 52 changer transitions 234/421 dead transitions. [2024-02-20 12:08:38,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 421 transitions, 5010 flow [2024-02-20 12:08:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-02-20 12:08:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-02-20 12:08:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 747 transitions. [2024-02-20 12:08:38,612 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49209486166007904 [2024-02-20 12:08:38,613 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 54 predicate places. [2024-02-20 12:08:38,613 INFO L507 AbstractCegarLoop]: Abstraction has has 86 places, 421 transitions, 5010 flow [2024-02-20 12:08:38,614 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.705882352941176) internal successors, (199), 17 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:38,614 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:38,614 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:38,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:08:38,831 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:38,831 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:38,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1852424535, now seen corresponding path program 1 times [2024-02-20 12:08:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:38,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024737238] [2024-02-20 12:08:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:08:38,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024737238] [2024-02-20 12:08:38,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024737238] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:08:38,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:08:38,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:08:38,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53815965] [2024-02-20 12:08:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:08:38,893 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:08:38,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:08:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:08:38,897 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-02-20 12:08:38,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 421 transitions, 5010 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:38,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:38,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-02-20 12:08:38,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:39,246 INFO L124 PetriNetUnfolderBase]: 1261/2352 cut-off events. [2024-02-20 12:08:39,247 INFO L125 PetriNetUnfolderBase]: For 7249/7289 co-relation queries the response was YES. [2024-02-20 12:08:39,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14114 conditions, 2352 events. 1261/2352 cut-off events. For 7249/7289 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13307 event pairs, 66 based on Foata normal form. 32/2097 useless extension candidates. Maximal degree in co-relation 6346. Up to 1843 conditions per place. [2024-02-20 12:08:39,264 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 168 selfloop transitions, 2 changer transitions 247/431 dead transitions. [2024-02-20 12:08:39,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 431 transitions, 5975 flow [2024-02-20 12:08:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:08:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:08:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-02-20 12:08:39,266 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-02-20 12:08:39,266 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 50 predicate places. [2024-02-20 12:08:39,267 INFO L507 AbstractCegarLoop]: Abstraction has has 82 places, 431 transitions, 5975 flow [2024-02-20 12:08:39,267 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:39,267 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:39,267 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:39,267 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-20 12:08:39,268 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:39,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash -466287374, now seen corresponding path program 2 times [2024-02-20 12:08:39,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:39,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700485273] [2024-02-20 12:08:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:39,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:39,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:39,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700485273] [2024-02-20 12:08:39,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700485273] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:39,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198971439] [2024-02-20 12:08:39,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:08:39,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:39,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:39,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:08:39,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:08:39,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:08:39,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 12:08:39,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:39,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:39,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198971439] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:39,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:39,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-02-20 12:08:39,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092192379] [2024-02-20 12:08:39,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:39,723 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 12:08:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 12:08:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-02-20 12:08:39,774 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:08:39,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 431 transitions, 5975 flow. Second operand has 16 states, 16 states have (on average 13.125) internal successors, (210), 16 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:39,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:39,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:08:39,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:40,305 INFO L124 PetriNetUnfolderBase]: 1244/2347 cut-off events. [2024-02-20 12:08:40,306 INFO L125 PetriNetUnfolderBase]: For 10190/10222 co-relation queries the response was YES. [2024-02-20 12:08:40,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15826 conditions, 2347 events. 1244/2347 cut-off events. For 10190/10222 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13327 event pairs, 72 based on Foata normal form. 0/2082 useless extension candidates. Maximal degree in co-relation 5493. Up to 1825 conditions per place. [2024-02-20 12:08:40,326 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 114 selfloop transitions, 3 changer transitions 316/447 dead transitions. [2024-02-20 12:08:40,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 447 transitions, 7048 flow [2024-02-20 12:08:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 12:08:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 12:08:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-02-20 12:08:40,328 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-02-20 12:08:40,329 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 59 predicate places. [2024-02-20 12:08:40,329 INFO L507 AbstractCegarLoop]: Abstraction has has 91 places, 447 transitions, 7048 flow [2024-02-20 12:08:40,329 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.125) internal successors, (210), 16 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:40,329 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:40,330 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:40,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:08:40,544 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-02-20 12:08:40,545 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:40,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash 975311631, now seen corresponding path program 3 times [2024-02-20 12:08:40,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:40,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499597060] [2024-02-20 12:08:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:40,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:41,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:41,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499597060] [2024-02-20 12:08:41,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499597060] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:41,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156933571] [2024-02-20 12:08:41,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:08:41,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:41,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:41,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:41,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:08:41,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:08:41,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:08:41,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-20 12:08:41,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 12:08:42,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:42,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:08:42,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-02-20 12:08:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 12:08:42,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156933571] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:42,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:42,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2024-02-20 12:08:42,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774091680] [2024-02-20 12:08:42,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:42,185 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 12:08:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 12:08:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-02-20 12:08:42,232 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:08:42,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 447 transitions, 7048 flow. Second operand has 16 states, 16 states have (on average 13.4375) internal successors, (215), 16 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:42,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:42,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:08:42,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:42,936 INFO L124 PetriNetUnfolderBase]: 1590/2983 cut-off events. [2024-02-20 12:08:42,937 INFO L125 PetriNetUnfolderBase]: For 18494/18542 co-relation queries the response was YES. [2024-02-20 12:08:42,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22454 conditions, 2983 events. 1590/2983 cut-off events. For 18494/18542 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 17901 event pairs, 86 based on Foata normal form. 1/2639 useless extension candidates. Maximal degree in co-relation 6329. Up to 2322 conditions per place. [2024-02-20 12:08:42,961 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 128 selfloop transitions, 31 changer transitions 389/562 dead transitions. [2024-02-20 12:08:42,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 562 transitions, 10006 flow [2024-02-20 12:08:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-20 12:08:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-20 12:08:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 247 transitions. [2024-02-20 12:08:42,964 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-02-20 12:08:42,964 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 72 predicate places. [2024-02-20 12:08:42,965 INFO L507 AbstractCegarLoop]: Abstraction has has 104 places, 562 transitions, 10006 flow [2024-02-20 12:08:42,965 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.4375) internal successors, (215), 16 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:42,965 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:42,965 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:42,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:08:43,182 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:43,186 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:43,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1953553425, now seen corresponding path program 4 times [2024-02-20 12:08:43,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:43,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993358230] [2024-02-20 12:08:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:43,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:43,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:43,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993358230] [2024-02-20 12:08:43,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993358230] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:43,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842754485] [2024-02-20 12:08:43,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:08:43,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:43,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:43,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:43,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:08:43,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:08:43,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:08:43,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:08:43,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:43,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:43,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842754485] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:43,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:43,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 8 [2024-02-20 12:08:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393382962] [2024-02-20 12:08:43,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:43,533 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-20 12:08:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-20 12:08:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-02-20 12:08:43,540 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-02-20 12:08:43,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 562 transitions, 10006 flow. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:43,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:43,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-02-20 12:08:43,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:44,768 INFO L124 PetriNetUnfolderBase]: 3000/5849 cut-off events. [2024-02-20 12:08:44,769 INFO L125 PetriNetUnfolderBase]: For 45915/46181 co-relation queries the response was YES. [2024-02-20 12:08:44,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49121 conditions, 5849 events. 3000/5849 cut-off events. For 45915/46181 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 38263 event pairs, 106 based on Foata normal form. 89/5560 useless extension candidates. Maximal degree in co-relation 18691. Up to 4572 conditions per place. [2024-02-20 12:08:44,822 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 390 selfloop transitions, 87 changer transitions 778/1262 dead transitions. [2024-02-20 12:08:44,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 1262 transitions, 25002 flow [2024-02-20 12:08:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 12:08:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 12:08:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 253 transitions. [2024-02-20 12:08:44,824 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-02-20 12:08:44,825 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 84 predicate places. [2024-02-20 12:08:44,825 INFO L507 AbstractCegarLoop]: Abstraction has has 116 places, 1262 transitions, 25002 flow [2024-02-20 12:08:44,825 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:44,825 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:44,825 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:44,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:08:45,042 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:45,042 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:45,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:45,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1027912524, now seen corresponding path program 5 times [2024-02-20 12:08:45,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:45,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844251325] [2024-02-20 12:08:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:45,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 12:08:45,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:45,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844251325] [2024-02-20 12:08:45,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844251325] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:08:45,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:08:45,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 12:08:45,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521058125] [2024-02-20 12:08:45,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:08:45,156 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:08:45,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:45,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:08:45,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:08:45,164 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-02-20 12:08:45,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 1262 transitions, 25002 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:45,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:45,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-02-20 12:08:45,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:47,606 INFO L124 PetriNetUnfolderBase]: 3774/7415 cut-off events. [2024-02-20 12:08:47,607 INFO L125 PetriNetUnfolderBase]: For 68704/69104 co-relation queries the response was YES. [2024-02-20 12:08:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68872 conditions, 7415 events. 3774/7415 cut-off events. For 68704/69104 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 49441 event pairs, 68 based on Foata normal form. 386/7236 useless extension candidates. Maximal degree in co-relation 28438. Up to 5808 conditions per place. [2024-02-20 12:08:47,664 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 586 selfloop transitions, 4 changer transitions 890/1501 dead transitions. [2024-02-20 12:08:47,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1501 transitions, 32803 flow [2024-02-20 12:08:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:08:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:08:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-02-20 12:08:47,666 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-02-20 12:08:47,667 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 87 predicate places. [2024-02-20 12:08:47,668 INFO L507 AbstractCegarLoop]: Abstraction has has 119 places, 1501 transitions, 32803 flow [2024-02-20 12:08:47,668 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:47,668 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:47,668 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:47,668 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-20 12:08:47,669 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:47,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:47,669 INFO L85 PathProgramCache]: Analyzing trace with hash 438808063, now seen corresponding path program 1 times [2024-02-20 12:08:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:47,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508378422] [2024-02-20 12:08:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:47,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:48,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508378422] [2024-02-20 12:08:48,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508378422] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437104073] [2024-02-20 12:08:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:48,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:48,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:48,510 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:48,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:08:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:48,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:08:48,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:48,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-20 12:08:49,166 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-02-20 12:08:49,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-02-20 12:08:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:49,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:50,075 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 116 treesize of output 104 [2024-02-20 12:08:50,118 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-02-20 12:08:50,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 196 [2024-02-20 12:08:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:51,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437104073] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:51,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:51,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-02-20 12:08:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821040266] [2024-02-20 12:08:51,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:51,811 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-02-20 12:08:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-02-20 12:08:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2024-02-20 12:08:52,190 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:08:52,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 1501 transitions, 32803 flow. Second operand has 35 states, 35 states have (on average 11.942857142857143) internal successors, (418), 35 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:52,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:52,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:08:52,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:56,427 INFO L124 PetriNetUnfolderBase]: 3979/7837 cut-off events. [2024-02-20 12:08:56,428 INFO L125 PetriNetUnfolderBase]: For 89387/89869 co-relation queries the response was YES. [2024-02-20 12:08:56,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79387 conditions, 7837 events. 3979/7837 cut-off events. For 89387/89869 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 53463 event pairs, 118 based on Foata normal form. 101/7280 useless extension candidates. Maximal degree in co-relation 31644. Up to 6178 conditions per place. [2024-02-20 12:08:56,482 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 569 selfloop transitions, 191 changer transitions 987/1774 dead transitions. [2024-02-20 12:08:56,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 1774 transitions, 42431 flow [2024-02-20 12:08:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 12:08:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 12:08:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 463 transitions. [2024-02-20 12:08:56,484 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5396270396270396 [2024-02-20 12:08:56,485 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2024-02-20 12:08:56,485 INFO L507 AbstractCegarLoop]: Abstraction has has 144 places, 1774 transitions, 42431 flow [2024-02-20 12:08:56,485 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 11.942857142857143) internal successors, (418), 35 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:56,486 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:56,486 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:56,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 12:08:56,702 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-02-20 12:08:56,702 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:56,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 554580783, now seen corresponding path program 2 times [2024-02-20 12:08:56,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:56,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004799199] [2024-02-20 12:08:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:56,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:57,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:57,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004799199] [2024-02-20 12:08:57,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004799199] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:57,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425783659] [2024-02-20 12:08:57,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:08:57,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:57,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:57,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:57,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:08:57,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:08:57,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:08:57,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 12:08:57,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:08:57,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:57,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:08:57,968 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 75 treesize of output 60 [2024-02-20 12:08:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:58,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425783659] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:58,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:58,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 25 [2024-02-20 12:08:58,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470806344] [2024-02-20 12:08:58,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:58,061 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 12:08:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 12:08:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-02-20 12:08:58,206 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:08:58,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 1774 transitions, 42431 flow. Second operand has 26 states, 26 states have (on average 12.653846153846153) internal successors, (329), 26 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:08:58,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:58,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:08:58,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:09:03,437 INFO L124 PetriNetUnfolderBase]: 5253/10347 cut-off events. [2024-02-20 12:09:03,438 INFO L125 PetriNetUnfolderBase]: For 136688/137168 co-relation queries the response was YES. [2024-02-20 12:09:03,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112861 conditions, 10347 events. 5253/10347 cut-off events. For 136688/137168 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 74535 event pairs, 178 based on Foata normal form. 8/9483 useless extension candidates. Maximal degree in co-relation 51435. Up to 8250 conditions per place. [2024-02-20 12:09:03,522 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 750 selfloop transitions, 176 changer transitions 1403/2357 dead transitions. [2024-02-20 12:09:03,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 2357 transitions, 61232 flow [2024-02-20 12:09:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 12:09:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 12:09:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 483 transitions. [2024-02-20 12:09:03,524 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5420875420875421 [2024-02-20 12:09:03,525 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 138 predicate places. [2024-02-20 12:09:03,525 INFO L507 AbstractCegarLoop]: Abstraction has has 170 places, 2357 transitions, 61232 flow [2024-02-20 12:09:03,526 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.653846153846153) internal successors, (329), 26 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:09:03,526 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:09:03,526 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:09:03,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 12:09:03,741 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:03,742 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:09:03,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:09:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 545810687, now seen corresponding path program 3 times [2024-02-20 12:09:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:09:03,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066790231] [2024-02-20 12:09:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:09:03,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:09:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:09:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:04,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:09:04,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066790231] [2024-02-20 12:09:04,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066790231] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:09:04,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450135021] [2024-02-20 12:09:04,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:09:04,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:09:04,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:09:04,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:09:04,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 12:09:04,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:09:04,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2024-02-20 12:09:04,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:09:04,914 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-02-20 12:09:04,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-02-20 12:09:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:04,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:09:05,260 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-02-20 12:09:05,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-02-20 12:09:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:05,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450135021] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:09:05,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:09:05,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-02-20 12:09:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574235938] [2024-02-20 12:09:05,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:09:05,863 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 12:09:05,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:09:05,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 12:09:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 12:09:06,123 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:09:06,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 2357 transitions, 61232 flow. Second operand has 34 states, 34 states have (on average 12.0) internal successors, (408), 34 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:09:06,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:09:06,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:09:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:09:12,926 INFO L124 PetriNetUnfolderBase]: 5266/10367 cut-off events. [2024-02-20 12:09:12,926 INFO L125 PetriNetUnfolderBase]: For 172227/172801 co-relation queries the response was YES. [2024-02-20 12:09:12,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121210 conditions, 10367 events. 5266/10367 cut-off events. For 172227/172801 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 74735 event pairs, 166 based on Foata normal form. 1/9486 useless extension candidates. Maximal degree in co-relation 55334. Up to 8253 conditions per place. [2024-02-20 12:09:13,030 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 749 selfloop transitions, 143 changer transitions 1442/2362 dead transitions. [2024-02-20 12:09:13,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 2362 transitions, 66001 flow [2024-02-20 12:09:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 12:09:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 12:09:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 456 transitions. [2024-02-20 12:09:13,033 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5314685314685315 [2024-02-20 12:09:13,034 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 163 predicate places. [2024-02-20 12:09:13,034 INFO L507 AbstractCegarLoop]: Abstraction has has 195 places, 2362 transitions, 66001 flow [2024-02-20 12:09:13,034 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 12.0) internal successors, (408), 34 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:09:13,034 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:09:13,034 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:09:13,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 12:09:13,250 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:13,251 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:09:13,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:09:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1461777332, now seen corresponding path program 4 times [2024-02-20 12:09:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:09:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538448046] [2024-02-20 12:09:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:09:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:09:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:09:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:14,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:09:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538448046] [2024-02-20 12:09:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538448046] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:09:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527684194] [2024-02-20 12:09:14,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:09:14,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:14,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:09:14,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:09:14,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 12:09:14,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:09:14,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:09:14,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 12:09:14,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:09:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:09:15,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:09:15,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:09:15,296 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 75 treesize of output 60 [2024-02-20 12:09:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:09:15,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527684194] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:09:15,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:09:15,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 25 [2024-02-20 12:09:15,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646041336] [2024-02-20 12:09:15,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:09:15,476 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 12:09:15,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:09:15,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 12:09:15,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2024-02-20 12:09:15,687 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:09:15,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 2362 transitions, 66001 flow. Second operand has 26 states, 26 states have (on average 12.615384615384615) internal successors, (328), 26 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:09:15,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:09:15,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:09:15,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:09:23,916 INFO L124 PetriNetUnfolderBase]: 6208/12199 cut-off events. [2024-02-20 12:09:23,916 INFO L125 PetriNetUnfolderBase]: For 243151/243783 co-relation queries the response was YES. [2024-02-20 12:09:23,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151732 conditions, 12199 events. 6208/12199 cut-off events. For 243151/243783 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 88259 event pairs, 156 based on Foata normal form. 6/11140 useless extension candidates. Maximal degree in co-relation 75938. Up to 9789 conditions per place. [2024-02-20 12:09:24,031 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 823 selfloop transitions, 234 changer transitions 1666/2750 dead transitions. [2024-02-20 12:09:24,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 2750 transitions, 82391 flow [2024-02-20 12:09:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-20 12:09:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-20 12:09:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 624 transitions. [2024-02-20 12:09:24,034 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5402597402597402 [2024-02-20 12:09:24,034 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 197 predicate places. [2024-02-20 12:09:24,034 INFO L507 AbstractCegarLoop]: Abstraction has has 229 places, 2750 transitions, 82391 flow [2024-02-20 12:09:24,035 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.615384615384615) internal successors, (328), 26 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:09:24,035 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:09:24,035 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:09:24,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-20 12:09:24,251 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-20 12:09:24,252 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:09:24,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:09:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2131970925, now seen corresponding path program 5 times [2024-02-20 12:09:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:09:24,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395122628] [2024-02-20 12:09:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:09:24,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:09:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:09:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 12:09:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:09:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395122628] [2024-02-20 12:09:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395122628] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:09:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170781145] [2024-02-20 12:09:24,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:09:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:09:24,401 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:09:24,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 12:09:24,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:09:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:09:24,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:09:24,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:09:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 12:09:24,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:09:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 12:09:24,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170781145] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:09:24,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:09:24,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-02-20 12:09:24,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891549075] [2024-02-20 12:09:24,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:09:24,713 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 12:09:24,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:09:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 12:09:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2024-02-20 12:09:24,744 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:09:24,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 2750 transitions, 82391 flow. Second operand has 18 states, 18 states have (on average 12.333333333333334) internal successors, (222), 18 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:09:24,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:09:24,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:09:24,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:09:32,881 INFO L124 PetriNetUnfolderBase]: 6148/12095 cut-off events. [2024-02-20 12:09:32,882 INFO L125 PetriNetUnfolderBase]: For 276665/277269 co-relation queries the response was YES. [2024-02-20 12:09:32,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159828 conditions, 12095 events. 6148/12095 cut-off events. For 276665/277269 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 87347 event pairs, 150 based on Foata normal form. 0/11060 useless extension candidates. Maximal degree in co-relation 80589. Up to 9692 conditions per place. [2024-02-20 12:09:33,141 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 969 selfloop transitions, 4 changer transitions 1723/2723 dead transitions. [2024-02-20 12:09:33,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 2723 transitions, 86930 flow [2024-02-20 12:09:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 12:09:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 12:09:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-02-20 12:09:33,143 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5589225589225589 [2024-02-20 12:09:33,144 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 205 predicate places. [2024-02-20 12:09:33,144 INFO L507 AbstractCegarLoop]: Abstraction has has 237 places, 2723 transitions, 86930 flow [2024-02-20 12:09:33,144 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.333333333333334) internal successors, (222), 18 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:09:33,144 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:09:33,144 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:09:33,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-20 12:09:33,359 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-20 12:09:33,360 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:09:33,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:09:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1132838744, now seen corresponding path program 6 times [2024-02-20 12:09:33,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:09:33,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096435083] [2024-02-20 12:09:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:09:33,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:09:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:09:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:09:33,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:09:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096435083] [2024-02-20 12:09:33,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096435083] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:09:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6938015] [2024-02-20 12:09:33,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:09:33,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:33,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:09:33,547 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:09:33,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 12:09:33,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-02-20 12:09:33,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:09:33,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:09:33,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:09:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:09:33,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:09:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:09:33,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6938015] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:09:33,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:09:33,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2024-02-20 12:09:33,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310025140] [2024-02-20 12:09:33,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:09:33,749 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-20 12:09:33,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:09:33,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-20 12:09:33,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-02-20 12:09:33,752 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-02-20 12:09:33,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 2723 transitions, 86930 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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) [2024-02-20 12:09:33,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:09:33,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-02-20 12:09:33,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:09:44,766 INFO L124 PetriNetUnfolderBase]: 8586/16881 cut-off events. [2024-02-20 12:09:44,766 INFO L125 PetriNetUnfolderBase]: For 409400/410336 co-relation queries the response was YES. [2024-02-20 12:09:44,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238115 conditions, 16881 events. 8586/16881 cut-off events. For 409400/410336 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 125055 event pairs, 188 based on Foata normal form. 120/15540 useless extension candidates. Maximal degree in co-relation 144407. Up to 13833 conditions per place. [2024-02-20 12:09:44,948 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 1433 selfloop transitions, 245 changer transitions 2199/3885 dead transitions. [2024-02-20 12:09:44,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 3885 transitions, 131862 flow [2024-02-20 12:09:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-20 12:09:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-20 12:09:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 287 transitions. [2024-02-20 12:09:44,950 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-02-20 12:09:44,951 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 218 predicate places. [2024-02-20 12:09:44,951 INFO L507 AbstractCegarLoop]: Abstraction has has 250 places, 3885 transitions, 131862 flow [2024-02-20 12:09:44,951 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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) [2024-02-20 12:09:44,951 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:09:44,951 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:09:44,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 12:09:45,164 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-20 12:09:45,164 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:09:45,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:09:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1679992457, now seen corresponding path program 7 times [2024-02-20 12:09:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:09:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505429092] [2024-02-20 12:09:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:09:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:09:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:09:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:47,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:09:47,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505429092] [2024-02-20 12:09:47,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505429092] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:09:47,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184606232] [2024-02-20 12:09:47,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:09:47,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:47,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:09:47,018 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:09:47,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 12:09:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:09:47,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2024-02-20 12:09:47,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:09:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:47,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:09:48,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:09:48,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2024-02-20 12:09:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:49,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184606232] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:09:49,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:09:49,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-02-20 12:09:49,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375263336] [2024-02-20 12:09:49,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:09:49,213 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-02-20 12:09:49,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:09:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-02-20 12:09:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1502, Unknown=0, NotChecked=0, Total=1892 [2024-02-20 12:09:49,557 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:09:49,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 3885 transitions, 131862 flow. Second operand has 44 states, 44 states have (on average 11.954545454545455) internal successors, (526), 44 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:09:49,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:09:49,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:09:49,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:10:33,401 INFO L124 PetriNetUnfolderBase]: 17782/34355 cut-off events. [2024-02-20 12:10:33,402 INFO L125 PetriNetUnfolderBase]: For 960029/962295 co-relation queries the response was YES. [2024-02-20 12:10:33,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515081 conditions, 34355 events. 17782/34355 cut-off events. For 960029/962295 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 285610 event pairs, 404 based on Foata normal form. 316/30850 useless extension candidates. Maximal degree in co-relation 344983. Up to 29043 conditions per place. [2024-02-20 12:10:33,792 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 3201 selfloop transitions, 1245 changer transitions 3759/8246 dead transitions. [2024-02-20 12:10:33,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 8246 transitions, 298011 flow [2024-02-20 12:10:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-02-20 12:10:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2024-02-20 12:10:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 1945 transitions. [2024-02-20 12:10:33,796 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5560320182961692 [2024-02-20 12:10:33,797 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 317 predicate places. [2024-02-20 12:10:33,797 INFO L507 AbstractCegarLoop]: Abstraction has has 349 places, 8246 transitions, 298011 flow [2024-02-20 12:10:33,797 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 11.954545454545455) internal successors, (526), 44 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:10:33,798 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:10:33,798 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:10:33,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-02-20 12:10:34,010 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-20 12:10:34,011 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:10:34,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:10:34,011 INFO L85 PathProgramCache]: Analyzing trace with hash -417395917, now seen corresponding path program 8 times [2024-02-20 12:10:34,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:10:34,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986710004] [2024-02-20 12:10:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:10:34,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:10:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:10:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:10:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:10:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986710004] [2024-02-20 12:10:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986710004] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:10:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210788410] [2024-02-20 12:10:35,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:10:35,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:10:35,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:10:35,234 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:10:35,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 12:10:35,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:10:35,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:10:35,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjunts are in the unsatisfiable core [2024-02-20 12:10:35,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:10:36,111 INFO L349 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2024-02-20 12:10:36,112 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 49 treesize of output 18 [2024-02-20 12:10:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:10:36,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:10:37,201 INFO L349 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2024-02-20 12:10:37,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 114 [2024-02-20 12:10:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:10:38,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210788410] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:10:38,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:10:38,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-02-20 12:10:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493085700] [2024-02-20 12:10:38,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:10:38,052 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-02-20 12:10:38,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:10:38,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-02-20 12:10:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2024-02-20 12:10:38,542 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:10:38,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 8246 transitions, 298011 flow. Second operand has 47 states, 47 states have (on average 11.829787234042554) internal successors, (556), 47 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:10:38,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:10:38,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:10:38,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:36,662 INFO L124 PetriNetUnfolderBase]: 26658/51626 cut-off events. [2024-02-20 12:13:36,662 INFO L125 PetriNetUnfolderBase]: For 1673304/1677232 co-relation queries the response was YES. [2024-02-20 12:13:36,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812700 conditions, 51626 events. 26658/51626 cut-off events. For 1673304/1677232 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 459014 event pairs, 610 based on Foata normal form. 435/45958 useless extension candidates. Maximal degree in co-relation 563487. Up to 43838 conditions per place. [2024-02-20 12:13:37,476 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 4990 selfloop transitions, 1787 changer transitions 6671/13489 dead transitions. [2024-02-20 12:13:37,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 13489 transitions, 515498 flow [2024-02-20 12:13:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-02-20 12:13:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-02-20 12:13:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1163 transitions. [2024-02-20 12:13:37,487 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5506628787878788 [2024-02-20 12:13:37,489 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 378 predicate places. [2024-02-20 12:13:37,489 INFO L507 AbstractCegarLoop]: Abstraction has has 410 places, 13489 transitions, 515498 flow [2024-02-20 12:13:37,489 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 11.829787234042554) internal successors, (556), 47 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:37,489 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:37,490 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:13:37,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-20 12:13:37,704 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-20 12:13:37,705 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:13:37,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1200075685, now seen corresponding path program 9 times [2024-02-20 12:13:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:37,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329203598] [2024-02-20 12:13:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:38,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:38,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329203598] [2024-02-20 12:13:38,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329203598] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:38,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325177067] [2024-02-20 12:13:38,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:13:38,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:38,506 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:13:38,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-20 12:13:38,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 12:13:38,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:13:38,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjunts are in the unsatisfiable core [2024-02-20 12:13:38,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:38,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-20 12:13:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:39,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:13:40,351 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 171 treesize of output 153 [2024-02-20 12:13:40,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:13:40,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 554 treesize of output 458 [2024-02-20 12:13:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:43,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325177067] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:13:43,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:13:43,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2024-02-20 12:13:43,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154481121] [2024-02-20 12:13:43,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:13:43,280 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-02-20 12:13:43,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-02-20 12:13:43,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1587, Unknown=0, NotChecked=0, Total=1980 [2024-02-20 12:13:43,652 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:13:43,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 13489 transitions, 515498 flow. Second operand has 45 states, 45 states have (on average 11.911111111111111) internal successors, (536), 45 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:43,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:43,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:13:43,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:18:37,034 INFO L124 PetriNetUnfolderBase]: 27412/52762 cut-off events. [2024-02-20 12:18:37,035 INFO L125 PetriNetUnfolderBase]: For 1856354/1860212 co-relation queries the response was YES. [2024-02-20 12:18:37,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874058 conditions, 52762 events. 27412/52762 cut-off events. For 1856354/1860212 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 467746 event pairs, 568 based on Foata normal form. 82/46139 useless extension candidates. Maximal degree in co-relation 573832. Up to 44922 conditions per place. [2024-02-20 12:18:37,955 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 5459 selfloop transitions, 1459 changer transitions 6969/13926 dead transitions. [2024-02-20 12:18:37,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 13926 transitions, 560064 flow [2024-02-20 12:18:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-02-20 12:18:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-02-20 12:18:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 1356 transitions. [2024-02-20 12:18:37,958 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5478787878787879 [2024-02-20 12:18:37,958 INFO L308 CegarLoopForPetriNet]: 32 programPoint places, 452 predicate places. [2024-02-20 12:18:37,958 INFO L507 AbstractCegarLoop]: Abstraction has has 484 places, 13926 transitions, 560064 flow [2024-02-20 12:18:37,959 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 11.911111111111111) internal successors, (536), 45 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:18:37,959 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:18:37,959 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:18:37,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-02-20 12:18:38,172 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:18:38,173 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:18:38,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:18:38,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2025896541, now seen corresponding path program 10 times [2024-02-20 12:18:38,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:18:38,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604225686] [2024-02-20 12:18:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:18:38,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:18:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:18:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:18:39,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:18:39,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604225686] [2024-02-20 12:18:39,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604225686] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:18:39,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292481649] [2024-02-20 12:18:39,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:18:39,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:18:39,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:18:39,153 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:18:39,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-20 12:18:39,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:18:39,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:18:39,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 40 conjunts are in the unsatisfiable core [2024-02-20 12:18:39,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:18:40,112 INFO L349 Elim1Store]: treesize reduction 72, result has 8.9 percent of original size [2024-02-20 12:18:40,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 24 [2024-02-20 12:18:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:18:40,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:18:41,945 INFO L349 Elim1Store]: treesize reduction 18, result has 92.1 percent of original size [2024-02-20 12:18:41,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 142 treesize of output 279 [2024-02-20 12:19:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:19:09,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292481649] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:19:09,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:19:09,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-02-20 12:19:09,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716372456] [2024-02-20 12:19:09,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:19:09,644 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-02-20 12:19:09,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:19:09,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-02-20 12:19:09,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2024-02-20 12:19:10,239 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-02-20 12:19:10,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 13926 transitions, 560064 flow. Second operand has 47 states, 47 states have (on average 11.829787234042554) internal successors, (556), 47 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:19:10,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:19:10,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-02-20 12:19:10,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15