./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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/bench-exp1x3.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 52eeb5cce5645e9dacc261319eae3d665b5cc432ff3ddd2ef39502a44996e68d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:14:07,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:14:07,922 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:14:07,928 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:14:07,929 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:14:07,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:14:07,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:14:07,954 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:14:07,954 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:14:07,958 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:14:07,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:14:07,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:14:07,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:14:07,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:14:07,960 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:14:07,960 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:14:07,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:14:07,961 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:14:07,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:14:07,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:14:07,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:14:07,962 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:14:07,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:14:07,962 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:14:07,963 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:14:07,963 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:14:07,963 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:14:07,963 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:14:07,964 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:14:07,964 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:14:07,965 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:14:07,965 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:14:07,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:07,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:14:07,966 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:14:07,966 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:14:07,966 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:14:07,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:14:07,966 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:14:07,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:14:07,967 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:14:07,967 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:14:07,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:14:07,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52eeb5cce5645e9dacc261319eae3d665b5cc432ff3ddd2ef39502a44996e68d [2024-01-27 15:14:08,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:14:08,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:14:08,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:14:08,207 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:14:08,207 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:14:08,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2024-01-27 15:14:09,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:14:09,393 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:14:09,393 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2024-01-27 15:14:09,408 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac6f6ffb0/100ef81a77a8459482f636d53aaaff0c/FLAGd3b895eae [2024-01-27 15:14:09,418 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac6f6ffb0/100ef81a77a8459482f636d53aaaff0c [2024-01-27 15:14:09,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:14:09,421 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:14:09,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:09,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:14:09,426 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:14:09,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3120d952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09, skipping insertion in model container [2024-01-27 15:14:09,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,445 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:14:09,563 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/bench-exp1x3.wvr.c[1875,1888] [2024-01-27 15:14:09,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:09,574 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:14:09,586 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/bench-exp1x3.wvr.c[1875,1888] [2024-01-27 15:14:09,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:09,598 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:14:09,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09 WrapperNode [2024-01-27 15:14:09,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:09,618 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:09,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:14:09,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:14:09,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,640 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,661 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2024-01-27 15:14:09,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:09,668 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:14:09,674 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:14:09,675 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:14:09,697 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,699 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,709 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:14:09,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,716 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,718 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:14:09,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:14:09,719 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:14:09,719 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:14:09,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (1/1) ... [2024-01-27 15:14:09,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:09,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:09,742 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) [2024-01-27 15:14:09,749 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 [2024-01-27 15:14:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:14:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:14:09,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:14:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:14:09,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:14:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:14:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:14:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:14:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:14:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:14:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:14:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:14:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:14:09,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:14:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:14:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:14:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:14:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:14:09,781 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:14:09,850 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:14:09,852 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:14:09,972 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:14:09,972 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:14:10,071 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:14:10,072 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:14:10,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:10 BoogieIcfgContainer [2024-01-27 15:14:10,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:14:10,074 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:14:10,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:14:10,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:14:10,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:14:09" (1/3) ... [2024-01-27 15:14:10,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536f9ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:10, skipping insertion in model container [2024-01-27 15:14:10,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:09" (2/3) ... [2024-01-27 15:14:10,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536f9ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:10, skipping insertion in model container [2024-01-27 15:14:10,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:10" (3/3) ... [2024-01-27 15:14:10,078 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2024-01-27 15:14:10,084 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:14:10,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:14:10,092 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:14:10,092 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:14:10,129 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:14:10,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2024-01-27 15:14:10,192 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-01-27 15:14:10,192 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:14:10,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:14:10,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2024-01-27 15:14:10,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2024-01-27 15:14:10,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:14:10,215 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3621dfc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:14:10,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:14:10,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:14:10,225 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2024-01-27 15:14:10,225 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:14:10,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:10,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:10,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:10,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:10,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1187932887, now seen corresponding path program 1 times [2024-01-27 15:14:10,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:10,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323854560] [2024-01-27 15:14:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:10,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:10,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:10,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323854560] [2024-01-27 15:14:10,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323854560] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:10,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:10,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:14:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466887010] [2024-01-27 15:14:10,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:10,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:14:10,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:14:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:14:10,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:14:10,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:10,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:10,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:14:10,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:10,724 INFO L124 PetriNetUnfolderBase]: 65/115 cut-off events. [2024-01-27 15:14:10,724 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-01-27 15:14:10,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 115 events. 65/115 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 314 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2024-01-27 15:14:10,726 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 19 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2024-01-27 15:14:10,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 26 transitions, 119 flow [2024-01-27 15:14:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:14:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:14:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2024-01-27 15:14:10,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2024-01-27 15:14:10,736 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 39 transitions. [2024-01-27 15:14:10,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 26 transitions, 119 flow [2024-01-27 15:14:10,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:14:10,740 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 55 flow [2024-01-27 15:14:10,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-01-27 15:14:10,744 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-01-27 15:14:10,744 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 55 flow [2024-01-27 15:14:10,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:10,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:10,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:10,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:14:10,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:10,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:10,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1773462458, now seen corresponding path program 1 times [2024-01-27 15:14:10,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:10,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274712947] [2024-01-27 15:14:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:10,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:10,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:10,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274712947] [2024-01-27 15:14:10,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274712947] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:10,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:10,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153737557] [2024-01-27 15:14:10,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:10,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:10,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:10,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:14:10,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:10,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:10,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:14:10,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:10,990 INFO L124 PetriNetUnfolderBase]: 63/112 cut-off events. [2024-01-27 15:14:10,990 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-01-27 15:14:10,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 112 events. 63/112 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 279 event pairs, 2 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 72. Up to 45 conditions per place. [2024-01-27 15:14:10,993 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 24 selfloop transitions, 6 changer transitions 4/37 dead transitions. [2024-01-27 15:14:10,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 37 transitions, 171 flow [2024-01-27 15:14:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-01-27 15:14:10,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-01-27 15:14:10,996 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 55 flow. Second operand 5 states and 60 transitions. [2024-01-27 15:14:10,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 37 transitions, 171 flow [2024-01-27 15:14:10,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 37 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:11,001 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 76 flow [2024-01-27 15:14:11,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2024-01-27 15:14:11,003 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2024-01-27 15:14:11,003 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 76 flow [2024-01-27 15:14:11,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:11,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:11,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:11,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:14:11,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:11,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash -94339393, now seen corresponding path program 1 times [2024-01-27 15:14:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:11,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785482065] [2024-01-27 15:14:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:11,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:11,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:11,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785482065] [2024-01-27 15:14:11,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785482065] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:11,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:11,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:11,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077941038] [2024-01-27 15:14:11,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:11,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:11,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:11,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:14:11,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:11,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:11,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:14:11,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:11,171 INFO L124 PetriNetUnfolderBase]: 56/103 cut-off events. [2024-01-27 15:14:11,171 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-01-27 15:14:11,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 103 events. 56/103 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 256 event pairs, 2 based on Foata normal form. 4/105 useless extension candidates. Maximal degree in co-relation 79. Up to 50 conditions per place. [2024-01-27 15:14:11,173 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 19 selfloop transitions, 4 changer transitions 8/34 dead transitions. [2024-01-27 15:14:11,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 173 flow [2024-01-27 15:14:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-01-27 15:14:11,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-01-27 15:14:11,175 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 76 flow. Second operand 5 states and 57 transitions. [2024-01-27 15:14:11,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 173 flow [2024-01-27 15:14:11,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 34 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:11,178 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 70 flow [2024-01-27 15:14:11,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2024-01-27 15:14:11,180 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-01-27 15:14:11,180 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 70 flow [2024-01-27 15:14:11,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:11,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:11,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:11,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:14:11,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:11,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1091816720, now seen corresponding path program 2 times [2024-01-27 15:14:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:11,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804772850] [2024-01-27 15:14:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:11,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:11,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:11,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804772850] [2024-01-27 15:14:11,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804772850] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:11,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169090028] [2024-01-27 15:14:11,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:11,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:11,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:11,316 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) [2024-01-27 15:14:11,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:14:11,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:11,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:11,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:14:11,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:11,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:11,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169090028] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:11,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:11,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-27 15:14:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842747713] [2024-01-27 15:14:11,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:11,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:11,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:11,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:14:11,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:14:11,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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) [2024-01-27 15:14:11,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:11,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:14:11,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:11,780 INFO L124 PetriNetUnfolderBase]: 44/80 cut-off events. [2024-01-27 15:14:11,781 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-01-27 15:14:11,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 80 events. 44/80 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 4 based on Foata normal form. 6/85 useless extension candidates. Maximal degree in co-relation 71. Up to 53 conditions per place. [2024-01-27 15:14:11,782 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2024-01-27 15:14:11,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 163 flow [2024-01-27 15:14:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-01-27 15:14:11,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-27 15:14:11,783 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 70 flow. Second operand 5 states and 55 transitions. [2024-01-27 15:14:11,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 163 flow [2024-01-27 15:14:11,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 153 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-27 15:14:11,785 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 97 flow [2024-01-27 15:14:11,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2024-01-27 15:14:11,786 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2024-01-27 15:14:11,786 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 97 flow [2024-01-27 15:14:11,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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) [2024-01-27 15:14:11,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:11,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:11,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:12,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:12,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:12,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash -73579569, now seen corresponding path program 2 times [2024-01-27 15:14:12,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141237896] [2024-01-27 15:14:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:12,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141237896] [2024-01-27 15:14:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141237896] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:12,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:12,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:12,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142544467] [2024-01-27 15:14:12,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:12,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:12,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:12,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:12,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:12,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:14:12,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:12,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:12,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:14:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:12,121 INFO L124 PetriNetUnfolderBase]: 40/76 cut-off events. [2024-01-27 15:14:12,121 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-01-27 15:14:12,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 76 events. 40/76 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 4 based on Foata normal form. 4/79 useless extension candidates. Maximal degree in co-relation 121. Up to 61 conditions per place. [2024-01-27 15:14:12,122 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 21 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2024-01-27 15:14:12,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 184 flow [2024-01-27 15:14:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-01-27 15:14:12,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2024-01-27 15:14:12,123 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 97 flow. Second operand 5 states and 51 transitions. [2024-01-27 15:14:12,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 184 flow [2024-01-27 15:14:12,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 179 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:12,125 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 133 flow [2024-01-27 15:14:12,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2024-01-27 15:14:12,126 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2024-01-27 15:14:12,126 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 133 flow [2024-01-27 15:14:12,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:12,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:12,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:12,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:14:12,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:12,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash 800063142, now seen corresponding path program 1 times [2024-01-27 15:14:12,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:12,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407458820] [2024-01-27 15:14:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:12,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:12,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:12,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407458820] [2024-01-27 15:14:12,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407458820] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:12,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887051397] [2024-01-27 15:14:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:12,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:12,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:12,437 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) [2024-01-27 15:14:12,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:14:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:12,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:14:12,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:17,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:17,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887051397] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:17,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:17,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-01-27 15:14:17,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142997934] [2024-01-27 15:14:17,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:17,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:14:17,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:17,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:14:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:14:17,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:14:17,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 133 flow. Second operand has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:17,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:17,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:14:17,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:19,827 INFO L124 PetriNetUnfolderBase]: 140/270 cut-off events. [2024-01-27 15:14:19,827 INFO L125 PetriNetUnfolderBase]: For 521/521 co-relation queries the response was YES. [2024-01-27 15:14:19,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 270 events. 140/270 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 972 event pairs, 4 based on Foata normal form. 7/276 useless extension candidates. Maximal degree in co-relation 572. Up to 91 conditions per place. [2024-01-27 15:14:19,830 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 55 selfloop transitions, 25 changer transitions 17/100 dead transitions. [2024-01-27 15:14:19,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 100 transitions, 687 flow [2024-01-27 15:14:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:14:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:14:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 157 transitions. [2024-01-27 15:14:19,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6356275303643725 [2024-01-27 15:14:19,837 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 133 flow. Second operand 13 states and 157 transitions. [2024-01-27 15:14:19,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 100 transitions, 687 flow [2024-01-27 15:14:19,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 100 transitions, 672 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:19,842 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 385 flow [2024-01-27 15:14:19,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=385, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-01-27 15:14:19,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2024-01-27 15:14:19,844 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 385 flow [2024-01-27 15:14:19,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:19,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:19,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:19,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:20,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:14:20,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:20,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1385179954, now seen corresponding path program 2 times [2024-01-27 15:14:20,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:20,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504019044] [2024-01-27 15:14:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:20,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:20,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:20,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504019044] [2024-01-27 15:14:20,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504019044] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:20,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462722029] [2024-01-27 15:14:20,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:20,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:20,289 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) [2024-01-27 15:14:20,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:14:20,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:20,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:20,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:14:20,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:26,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:27,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462722029] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:27,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:27,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-01-27 15:14:27,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572514120] [2024-01-27 15:14:27,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:27,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:14:27,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:14:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:14:27,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:14:27,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 385 flow. Second operand has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:27,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:27,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:14:27,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:30,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:14:30,756 INFO L124 PetriNetUnfolderBase]: 211/404 cut-off events. [2024-01-27 15:14:30,756 INFO L125 PetriNetUnfolderBase]: For 2210/2210 co-relation queries the response was YES. [2024-01-27 15:14:30,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2112 conditions, 404 events. 211/404 cut-off events. For 2210/2210 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1668 event pairs, 26 based on Foata normal form. 5/408 useless extension candidates. Maximal degree in co-relation 2051. Up to 221 conditions per place. [2024-01-27 15:14:30,759 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 71 selfloop transitions, 25 changer transitions 11/110 dead transitions. [2024-01-27 15:14:30,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 110 transitions, 1015 flow [2024-01-27 15:14:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:14:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:14:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 151 transitions. [2024-01-27 15:14:30,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611336032388664 [2024-01-27 15:14:30,761 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 385 flow. Second operand 13 states and 151 transitions. [2024-01-27 15:14:30,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 110 transitions, 1015 flow [2024-01-27 15:14:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 110 transitions, 918 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-01-27 15:14:30,770 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 580 flow [2024-01-27 15:14:30,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=580, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2024-01-27 15:14:30,770 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2024-01-27 15:14:30,772 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 580 flow [2024-01-27 15:14:30,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:30,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:30,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:30,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:30,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:30,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:30,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash -386715035, now seen corresponding path program 3 times [2024-01-27 15:14:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:30,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153053761] [2024-01-27 15:14:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:31,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:31,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153053761] [2024-01-27 15:14:31,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153053761] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:31,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085083993] [2024-01-27 15:14:31,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:14:31,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:31,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:31,071 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) [2024-01-27 15:14:31,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:14:31,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:14:31,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:31,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:14:31,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:32,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085083993] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:33,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:33,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 14 [2024-01-27 15:14:33,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519962827] [2024-01-27 15:14:33,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:33,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:14:33,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:33,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:14:33,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:14:33,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:14:33,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 580 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:33,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:33,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:14:33,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:37,108 INFO L124 PetriNetUnfolderBase]: 384/713 cut-off events. [2024-01-27 15:14:37,108 INFO L125 PetriNetUnfolderBase]: For 7134/7134 co-relation queries the response was YES. [2024-01-27 15:14:37,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4209 conditions, 713 events. 384/713 cut-off events. For 7134/7134 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3338 event pairs, 20 based on Foata normal form. 42/754 useless extension candidates. Maximal degree in co-relation 4134. Up to 253 conditions per place. [2024-01-27 15:14:37,112 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 83 selfloop transitions, 78 changer transitions 43/207 dead transitions. [2024-01-27 15:14:37,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 207 transitions, 2349 flow [2024-01-27 15:14:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:14:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:14:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 239 transitions. [2024-01-27 15:14:37,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5469107551487414 [2024-01-27 15:14:37,113 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 580 flow. Second operand 23 states and 239 transitions. [2024-01-27 15:14:37,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 207 transitions, 2349 flow [2024-01-27 15:14:37,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 207 transitions, 2099 flow, removed 122 selfloop flow, removed 3 redundant places. [2024-01-27 15:14:37,128 INFO L231 Difference]: Finished difference. Result has 97 places, 119 transitions, 1224 flow [2024-01-27 15:14:37,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1224, PETRI_PLACES=97, PETRI_TRANSITIONS=119} [2024-01-27 15:14:37,129 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 76 predicate places. [2024-01-27 15:14:37,129 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 119 transitions, 1224 flow [2024-01-27 15:14:37,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:37,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:37,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:37,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:37,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:37,341 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:37,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:37,341 INFO L85 PathProgramCache]: Analyzing trace with hash 802696837, now seen corresponding path program 4 times [2024-01-27 15:14:37,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:37,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819422087] [2024-01-27 15:14:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:37,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:37,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:37,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819422087] [2024-01-27 15:14:37,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819422087] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:37,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128849233] [2024-01-27 15:14:37,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:14:37,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:37,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:37,428 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) [2024-01-27 15:14:37,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:14:37,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:14:37,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:37,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:14:37,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:59,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:15:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128849233] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:23,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:23,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 14 [2024-01-27 15:15:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456267419] [2024-01-27 15:15:23,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:23,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:15:23,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:15:23,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=158, Unknown=11, NotChecked=0, Total=210 [2024-01-27 15:15:23,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:15:23,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 119 transitions, 1224 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:23,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:23,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:15:23,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:48,643 INFO L124 PetriNetUnfolderBase]: 342/637 cut-off events. [2024-01-27 15:15:48,644 INFO L125 PetriNetUnfolderBase]: For 8282/8282 co-relation queries the response was YES. [2024-01-27 15:15:48,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4066 conditions, 637 events. 342/637 cut-off events. For 8282/8282 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2786 event pairs, 22 based on Foata normal form. 15/651 useless extension candidates. Maximal degree in co-relation 3974. Up to 297 conditions per place. [2024-01-27 15:15:48,649 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 118 selfloop transitions, 34 changer transitions 13/168 dead transitions. [2024-01-27 15:15:48,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 168 transitions, 2043 flow [2024-01-27 15:15:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:15:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:15:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-01-27 15:15:48,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406698564593302 [2024-01-27 15:15:48,650 INFO L175 Difference]: Start difference. First operand has 97 places, 119 transitions, 1224 flow. Second operand 11 states and 113 transitions. [2024-01-27 15:15:48,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 168 transitions, 2043 flow [2024-01-27 15:15:48,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 168 transitions, 1678 flow, removed 158 selfloop flow, removed 10 redundant places. [2024-01-27 15:15:48,669 INFO L231 Difference]: Finished difference. Result has 96 places, 132 transitions, 1120 flow [2024-01-27 15:15:48,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1120, PETRI_PLACES=96, PETRI_TRANSITIONS=132} [2024-01-27 15:15:48,669 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 75 predicate places. [2024-01-27 15:15:48,669 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 132 transitions, 1120 flow [2024-01-27 15:15:48,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:48,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:48,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:48,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:15:48,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:48,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:48,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1495323629, now seen corresponding path program 5 times [2024-01-27 15:15:48,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:48,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891556756] [2024-01-27 15:15:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:48,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:15:48,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:48,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891556756] [2024-01-27 15:15:48,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891556756] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:48,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923305749] [2024-01-27 15:15:48,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:15:48,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:48,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:48,970 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) [2024-01-27 15:15:48,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:15:49,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:15:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:49,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:15:49,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:15:55,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:16:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:16:00,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923305749] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:16:00,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:16:00,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 14 [2024-01-27 15:16:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130668521] [2024-01-27 15:16:00,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:16:00,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:16:00,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:16:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:16:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=147, Unknown=1, NotChecked=0, Total=210 [2024-01-27 15:16:00,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:16:00,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 132 transitions, 1120 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:16:00,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:16:00,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:16:00,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:16:04,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:10,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:15,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:19,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:20,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:24,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:28,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:32,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:44,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:49,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:53,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:17:12,218 WARN L293 SmtUtils]: Spent 8.76s on a formula simplification. DAG size of input: 63 DAG size of output: 38 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:17:24,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:17:25,780 INFO L124 PetriNetUnfolderBase]: 576/1105 cut-off events. [2024-01-27 15:17:25,780 INFO L125 PetriNetUnfolderBase]: For 17342/17342 co-relation queries the response was YES. [2024-01-27 15:17:25,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6731 conditions, 1105 events. 576/1105 cut-off events. For 17342/17342 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5824 event pairs, 12 based on Foata normal form. 34/1134 useless extension candidates. Maximal degree in co-relation 6427. Up to 345 conditions per place. [2024-01-27 15:17:25,831 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 155 selfloop transitions, 117 changer transitions 25/300 dead transitions. [2024-01-27 15:17:25,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 300 transitions, 3201 flow [2024-01-27 15:17:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:17:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:17:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 283 transitions. [2024-01-27 15:17:25,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957894736842105 [2024-01-27 15:17:25,832 INFO L175 Difference]: Start difference. First operand has 96 places, 132 transitions, 1120 flow. Second operand 25 states and 283 transitions. [2024-01-27 15:17:25,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 300 transitions, 3201 flow [2024-01-27 15:17:25,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 300 transitions, 3121 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-01-27 15:17:25,858 INFO L231 Difference]: Finished difference. Result has 128 places, 197 transitions, 2234 flow [2024-01-27 15:17:25,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2234, PETRI_PLACES=128, PETRI_TRANSITIONS=197} [2024-01-27 15:17:25,859 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 107 predicate places. [2024-01-27 15:17:25,859 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 197 transitions, 2234 flow [2024-01-27 15:17:25,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:25,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:25,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:25,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:26,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:26,063 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:17:26,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1121191057, now seen corresponding path program 6 times [2024-01-27 15:17:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193160379] [2024-01-27 15:17:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:26,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:26,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193160379] [2024-01-27 15:17:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193160379] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:26,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788670096] [2024-01-27 15:17:26,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:17:26,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:26,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:26,823 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) [2024-01-27 15:17:26,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:17:27,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:17:27,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:27,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:17:27,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:33,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:34,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788670096] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:17:34,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:17:34,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-01-27 15:17:34,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706276177] [2024-01-27 15:17:34,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:17:34,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:17:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:34,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:17:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:17:34,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:17:34,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 197 transitions, 2234 flow. Second operand has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:34,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:34,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:17:34,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:46,287 WARN L293 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 77 DAG size of output: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:17:58,003 WARN L293 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 91 DAG size of output: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:18:02,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:05,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:11,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:18,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:23,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:31,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:32,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:35,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:39,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:18:40,808 INFO L124 PetriNetUnfolderBase]: 706/1384 cut-off events. [2024-01-27 15:18:40,808 INFO L125 PetriNetUnfolderBase]: For 41723/41723 co-relation queries the response was YES. [2024-01-27 15:18:40,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10655 conditions, 1384 events. 706/1384 cut-off events. For 41723/41723 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8059 event pairs, 58 based on Foata normal form. 17/1394 useless extension candidates. Maximal degree in co-relation 10409. Up to 778 conditions per place. [2024-01-27 15:18:40,818 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 221 selfloop transitions, 99 changer transitions 23/346 dead transitions. [2024-01-27 15:18:40,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 346 transitions, 4582 flow [2024-01-27 15:18:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:18:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:18:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 249 transitions. [2024-01-27 15:18:40,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2024-01-27 15:18:40,825 INFO L175 Difference]: Start difference. First operand has 128 places, 197 transitions, 2234 flow. Second operand 21 states and 249 transitions. [2024-01-27 15:18:40,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 346 transitions, 4582 flow [2024-01-27 15:18:40,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 346 transitions, 4231 flow, removed 159 selfloop flow, removed 9 redundant places. [2024-01-27 15:18:40,904 INFO L231 Difference]: Finished difference. Result has 147 places, 255 transitions, 3146 flow [2024-01-27 15:18:40,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3146, PETRI_PLACES=147, PETRI_TRANSITIONS=255} [2024-01-27 15:18:40,905 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 126 predicate places. [2024-01-27 15:18:40,905 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 255 transitions, 3146 flow [2024-01-27 15:18:40,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:18:40,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:18:40,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:18:40,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:18:41,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:41,117 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:18:41,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:18:41,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2105791559, now seen corresponding path program 7 times [2024-01-27 15:18:41,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:18:41,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568865061] [2024-01-27 15:18:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:18:41,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:18:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:18:41,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:18:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568865061] [2024-01-27 15:18:41,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568865061] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:18:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345887123] [2024-01-27 15:18:41,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:18:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:18:41,581 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) [2024-01-27 15:18:41,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:18:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:42,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:18:42,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:19:11,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:19:17,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345887123] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:17,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:17,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-27 15:19:17,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002424346] [2024-01-27 15:19:17,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:17,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:19:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:19:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=322, Unknown=5, NotChecked=0, Total=420 [2024-01-27 15:19:17,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:19:17,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 255 transitions, 3146 flow. Second operand has 21 states, 21 states have (on average 6.714285714285714) internal successors, (141), 21 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:17,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:17,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:19:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:37,169 WARN L293 SmtUtils]: Spent 10.25s on a formula simplification. DAG size of input: 71 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:19:39,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:01,637 WARN L293 SmtUtils]: Spent 13.25s on a formula simplification. DAG size of input: 85 DAG size of output: 63 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:20:06,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:09,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:13,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:16,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:20,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:31,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:33,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:34,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:42,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:53,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:55,858 INFO L124 PetriNetUnfolderBase]: 799/1620 cut-off events. [2024-01-27 15:20:55,858 INFO L125 PetriNetUnfolderBase]: For 45615/45615 co-relation queries the response was YES. [2024-01-27 15:20:55,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12263 conditions, 1620 events. 799/1620 cut-off events. For 45615/45615 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10040 event pairs, 20 based on Foata normal form. 6/1623 useless extension candidates. Maximal degree in co-relation 11686. Up to 799 conditions per place. [2024-01-27 15:20:55,870 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 224 selfloop transitions, 137 changer transitions 27/391 dead transitions. [2024-01-27 15:20:55,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 391 transitions, 5403 flow [2024-01-27 15:20:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:20:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:20:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 244 transitions. [2024-01-27 15:20:55,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5350877192982456 [2024-01-27 15:20:55,873 INFO L175 Difference]: Start difference. First operand has 147 places, 255 transitions, 3146 flow. Second operand 24 states and 244 transitions. [2024-01-27 15:20:55,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 391 transitions, 5403 flow [2024-01-27 15:20:55,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 391 transitions, 4972 flow, removed 200 selfloop flow, removed 5 redundant places. [2024-01-27 15:20:55,990 INFO L231 Difference]: Finished difference. Result has 177 places, 310 transitions, 4079 flow [2024-01-27 15:20:55,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4079, PETRI_PLACES=177, PETRI_TRANSITIONS=310} [2024-01-27 15:20:55,991 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2024-01-27 15:20:55,991 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 310 transitions, 4079 flow [2024-01-27 15:20:55,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.714285714285714) internal successors, (141), 21 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:55,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:55,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:56,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 15:20:56,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:20:56,192 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:56,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash 230214949, now seen corresponding path program 8 times [2024-01-27 15:20:56,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:56,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690374850] [2024-01-27 15:20:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:20:56,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690374850] [2024-01-27 15:20:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690374850] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53698639] [2024-01-27 15:20:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:56,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:56,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:56,316 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) [2024-01-27 15:20:56,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:20:56,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:56,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:56,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:20:56,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:05,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:06,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53698639] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:06,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:06,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:21:06,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918560466] [2024-01-27 15:21:06,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:06,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:21:06,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:06,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:21:06,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=353, Unknown=1, NotChecked=0, Total=420 [2024-01-27 15:21:06,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:21:06,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 310 transitions, 4079 flow. Second operand has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:06,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:06,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:21:06,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:23,843 INFO L124 PetriNetUnfolderBase]: 1073/2246 cut-off events. [2024-01-27 15:21:23,843 INFO L125 PetriNetUnfolderBase]: For 64855/64855 co-relation queries the response was YES. [2024-01-27 15:21:23,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17834 conditions, 2246 events. 1073/2246 cut-off events. For 64855/64855 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15383 event pairs, 38 based on Foata normal form. 20/2263 useless extension candidates. Maximal degree in co-relation 17735. Up to 709 conditions per place. [2024-01-27 15:21:23,861 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 329 selfloop transitions, 177 changer transitions 46/555 dead transitions. [2024-01-27 15:21:23,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 555 transitions, 8661 flow [2024-01-27 15:21:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:21:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:21:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 293 transitions. [2024-01-27 15:21:23,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507518796992481 [2024-01-27 15:21:23,887 INFO L175 Difference]: Start difference. First operand has 177 places, 310 transitions, 4079 flow. Second operand 28 states and 293 transitions. [2024-01-27 15:21:23,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 555 transitions, 8661 flow [2024-01-27 15:21:24,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 555 transitions, 8112 flow, removed 258 selfloop flow, removed 9 redundant places. [2024-01-27 15:21:24,045 INFO L231 Difference]: Finished difference. Result has 198 places, 403 transitions, 5952 flow [2024-01-27 15:21:24,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5952, PETRI_PLACES=198, PETRI_TRANSITIONS=403} [2024-01-27 15:21:24,046 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 177 predicate places. [2024-01-27 15:21:24,046 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 403 transitions, 5952 flow [2024-01-27 15:21:24,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:24,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:24,046 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:24,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:24,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:21:24,257 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:24,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash 683273843, now seen corresponding path program 9 times [2024-01-27 15:21:24,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:24,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907812505] [2024-01-27 15:21:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:24,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:21:24,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:24,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907812505] [2024-01-27 15:21:24,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907812505] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:24,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389548749] [2024-01-27 15:21:24,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:21:24,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:24,408 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) [2024-01-27 15:21:24,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:21:24,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:21:24,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:24,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:21:24,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:21:25,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:21:25,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389548749] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:25,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:25,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 13 [2024-01-27 15:21:25,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784029183] [2024-01-27 15:21:25,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:25,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:21:25,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:25,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:21:25,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:21:25,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:21:25,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 403 transitions, 5952 flow. Second operand has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:25,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:25,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:21:25,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:29,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:33,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:37,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:41,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:46,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:47,516 INFO L124 PetriNetUnfolderBase]: 947/1977 cut-off events. [2024-01-27 15:21:47,516 INFO L125 PetriNetUnfolderBase]: For 59389/59389 co-relation queries the response was YES. [2024-01-27 15:21:47,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15570 conditions, 1977 events. 947/1977 cut-off events. For 59389/59389 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13040 event pairs, 4 based on Foata normal form. 74/2048 useless extension candidates. Maximal degree in co-relation 15043. Up to 1203 conditions per place. [2024-01-27 15:21:47,531 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 304 selfloop transitions, 118 changer transitions 11/436 dead transitions. [2024-01-27 15:21:47,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 436 transitions, 7158 flow [2024-01-27 15:21:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:21:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:21:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 159 transitions. [2024-01-27 15:21:47,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578947368421052 [2024-01-27 15:21:47,532 INFO L175 Difference]: Start difference. First operand has 198 places, 403 transitions, 5952 flow. Second operand 15 states and 159 transitions. [2024-01-27 15:21:47,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 436 transitions, 7158 flow [2024-01-27 15:21:47,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 436 transitions, 6107 flow, removed 499 selfloop flow, removed 9 redundant places. [2024-01-27 15:21:47,690 INFO L231 Difference]: Finished difference. Result has 203 places, 381 transitions, 5087 flow [2024-01-27 15:21:47,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4441, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5087, PETRI_PLACES=203, PETRI_TRANSITIONS=381} [2024-01-27 15:21:47,690 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 182 predicate places. [2024-01-27 15:21:47,691 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 381 transitions, 5087 flow [2024-01-27 15:21:47,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:47,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:47,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:47,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:47,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:21:47,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:47,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash 914490199, now seen corresponding path program 10 times [2024-01-27 15:21:47,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112126838] [2024-01-27 15:21:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:47,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:48,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:48,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112126838] [2024-01-27 15:21:48,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112126838] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:48,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328344849] [2024-01-27 15:21:48,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:21:48,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:48,057 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) [2024-01-27 15:21:48,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:21:48,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:21:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:48,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:21:48,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:59,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:22:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328344849] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:04,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:04,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:22:04,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130748235] [2024-01-27 15:22:04,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:04,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:22:04,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:22:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=332, Unknown=2, NotChecked=0, Total=420 [2024-01-27 15:22:04,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:22:04,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 381 transitions, 5087 flow. Second operand has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:04,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:04,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:22:04,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:10,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:24,400 WARN L293 SmtUtils]: Spent 13.71s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:22:31,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:33,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:35,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:56,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:17,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:21,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:25,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:43,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:49,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:52,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:54,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:00,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:05,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:09,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:12,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:14,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:18,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:19,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:22,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:26,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:29,136 INFO L124 PetriNetUnfolderBase]: 1326/2630 cut-off events. [2024-01-27 15:24:29,137 INFO L125 PetriNetUnfolderBase]: For 93947/93947 co-relation queries the response was YES. [2024-01-27 15:24:29,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22554 conditions, 2630 events. 1326/2630 cut-off events. For 93947/93947 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17811 event pairs, 34 based on Foata normal form. 122/2739 useless extension candidates. Maximal degree in co-relation 22184. Up to 619 conditions per place. [2024-01-27 15:24:29,156 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 259 selfloop transitions, 208 changer transitions 143/613 dead transitions. [2024-01-27 15:24:29,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 613 transitions, 10433 flow [2024-01-27 15:24:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:24:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:24:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 282 transitions. [2024-01-27 15:24:29,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5936842105263158 [2024-01-27 15:24:29,158 INFO L175 Difference]: Start difference. First operand has 203 places, 381 transitions, 5087 flow. Second operand 25 states and 282 transitions. [2024-01-27 15:24:29,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 613 transitions, 10433 flow [2024-01-27 15:24:29,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 613 transitions, 9694 flow, removed 321 selfloop flow, removed 13 redundant places. [2024-01-27 15:24:29,451 INFO L231 Difference]: Finished difference. Result has 222 places, 393 transitions, 5560 flow [2024-01-27 15:24:29,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4272, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5560, PETRI_PLACES=222, PETRI_TRANSITIONS=393} [2024-01-27 15:24:29,451 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 201 predicate places. [2024-01-27 15:24:29,452 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 393 transitions, 5560 flow [2024-01-27 15:24:29,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:29,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:29,452 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:29,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:29,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:24:29,654 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:29,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:29,654 INFO L85 PathProgramCache]: Analyzing trace with hash -550563673, now seen corresponding path program 11 times [2024-01-27 15:24:29,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:29,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352503670] [2024-01-27 15:24:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:29,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:29,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352503670] [2024-01-27 15:24:29,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352503670] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:29,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322959791] [2024-01-27 15:24:29,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:24:29,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:29,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:29,808 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) [2024-01-27 15:24:29,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:24:30,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:24:30,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:30,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:24:30,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:32,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:33,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322959791] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:33,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:33,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:24:33,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042963495] [2024-01-27 15:24:33,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:24:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:24:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:24:33,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:24:33,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 393 transitions, 5560 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:33,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:33,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:24:33,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:36,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:38,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:40,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:43,869 INFO L124 PetriNetUnfolderBase]: 972/1856 cut-off events. [2024-01-27 15:24:43,869 INFO L125 PetriNetUnfolderBase]: For 42215/42215 co-relation queries the response was YES. [2024-01-27 15:24:43,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14664 conditions, 1856 events. 972/1856 cut-off events. For 42215/42215 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10996 event pairs, 102 based on Foata normal form. 8/1863 useless extension candidates. Maximal degree in co-relation 14394. Up to 1520 conditions per place. [2024-01-27 15:24:43,882 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 324 selfloop transitions, 108 changer transitions 0/435 dead transitions. [2024-01-27 15:24:43,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 435 transitions, 6894 flow [2024-01-27 15:24:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:24:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:24:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-01-27 15:24:43,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338345864661654 [2024-01-27 15:24:43,884 INFO L175 Difference]: Start difference. First operand has 222 places, 393 transitions, 5560 flow. Second operand 14 states and 142 transitions. [2024-01-27 15:24:43,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 435 transitions, 6894 flow [2024-01-27 15:24:43,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 435 transitions, 6087 flow, removed 298 selfloop flow, removed 27 redundant places. [2024-01-27 15:24:44,002 INFO L231 Difference]: Finished difference. Result has 185 places, 399 transitions, 5252 flow [2024-01-27 15:24:44,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5252, PETRI_PLACES=185, PETRI_TRANSITIONS=399} [2024-01-27 15:24:44,003 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2024-01-27 15:24:44,003 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 399 transitions, 5252 flow [2024-01-27 15:24:44,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:44,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:44,004 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:44,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:44,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:24:44,215 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:44,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash 556084180, now seen corresponding path program 12 times [2024-01-27 15:24:44,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246946705] [2024-01-27 15:24:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:44,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:44,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:44,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246946705] [2024-01-27 15:24:44,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246946705] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:44,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927808597] [2024-01-27 15:24:44,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:24:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:44,373 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) [2024-01-27 15:24:44,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:24:44,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:24:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:44,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:24:44,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:49,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927808597] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:49,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:49,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:24:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053456567] [2024-01-27 15:24:49,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:49,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:24:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:49,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:24:49,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:24:49,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:24:49,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 399 transitions, 5252 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:49,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:49,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:24:49,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:54,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:00,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:04,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:05,402 INFO L124 PetriNetUnfolderBase]: 1160/2293 cut-off events. [2024-01-27 15:25:05,403 INFO L125 PetriNetUnfolderBase]: For 49054/49054 co-relation queries the response was YES. [2024-01-27 15:25:05,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 2293 events. 1160/2293 cut-off events. For 49054/49054 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14877 event pairs, 122 based on Foata normal form. 26/2318 useless extension candidates. Maximal degree in co-relation 16668. Up to 1544 conditions per place. [2024-01-27 15:25:05,417 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 390 selfloop transitions, 138 changer transitions 1/532 dead transitions. [2024-01-27 15:25:05,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 532 transitions, 8192 flow [2024-01-27 15:25:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:25:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:25:05,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 232 transitions. [2024-01-27 15:25:05,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581453634085213 [2024-01-27 15:25:05,419 INFO L175 Difference]: Start difference. First operand has 185 places, 399 transitions, 5252 flow. Second operand 21 states and 232 transitions. [2024-01-27 15:25:05,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 532 transitions, 8192 flow [2024-01-27 15:25:05,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 532 transitions, 7900 flow, removed 65 selfloop flow, removed 9 redundant places. [2024-01-27 15:25:05,607 INFO L231 Difference]: Finished difference. Result has 207 places, 459 transitions, 6565 flow [2024-01-27 15:25:05,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6565, PETRI_PLACES=207, PETRI_TRANSITIONS=459} [2024-01-27 15:25:05,608 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2024-01-27 15:25:05,608 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 459 transitions, 6565 flow [2024-01-27 15:25:05,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:05,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:05,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:05,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:05,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:25:05,820 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:05,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:05,820 INFO L85 PathProgramCache]: Analyzing trace with hash -191146334, now seen corresponding path program 13 times [2024-01-27 15:25:05,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:05,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014024689] [2024-01-27 15:25:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:05,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:05,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:05,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014024689] [2024-01-27 15:25:05,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014024689] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:05,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80960380] [2024-01-27 15:25:05,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:25:05,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:05,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:05,940 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) [2024-01-27 15:25:05,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:25:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:06,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:25:06,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:10,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:11,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80960380] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:11,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:11,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:25:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245792100] [2024-01-27 15:25:11,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:11,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:25:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:25:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:25:11,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:25:11,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 459 transitions, 6565 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:11,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:11,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:25:11,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:21,169 INFO L124 PetriNetUnfolderBase]: 1259/2504 cut-off events. [2024-01-27 15:25:21,169 INFO L125 PetriNetUnfolderBase]: For 95529/95529 co-relation queries the response was YES. [2024-01-27 15:25:21,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22299 conditions, 2504 events. 1259/2504 cut-off events. For 95529/95529 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16880 event pairs, 66 based on Foata normal form. 61/2564 useless extension candidates. Maximal degree in co-relation 21815. Up to 815 conditions per place. [2024-01-27 15:25:21,187 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 354 selfloop transitions, 238 changer transitions 38/633 dead transitions. [2024-01-27 15:25:21,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 633 transitions, 11312 flow [2024-01-27 15:25:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:25:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:25:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 331 transitions. [2024-01-27 15:25:21,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444078947368421 [2024-01-27 15:25:21,189 INFO L175 Difference]: Start difference. First operand has 207 places, 459 transitions, 6565 flow. Second operand 32 states and 331 transitions. [2024-01-27 15:25:21,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 633 transitions, 11312 flow [2024-01-27 15:25:21,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 633 transitions, 10822 flow, removed 176 selfloop flow, removed 8 redundant places. [2024-01-27 15:25:21,422 INFO L231 Difference]: Finished difference. Result has 242 places, 500 transitions, 7672 flow [2024-01-27 15:25:21,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7672, PETRI_PLACES=242, PETRI_TRANSITIONS=500} [2024-01-27 15:25:21,423 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2024-01-27 15:25:21,423 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 500 transitions, 7672 flow [2024-01-27 15:25:21,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:21,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:21,423 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:21,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:21,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:21,634 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:21,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1633813804, now seen corresponding path program 14 times [2024-01-27 15:25:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:21,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391403056] [2024-01-27 15:25:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:21,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:21,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:21,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391403056] [2024-01-27 15:25:21,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391403056] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:21,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899519148] [2024-01-27 15:25:21,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:25:21,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:21,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:21,777 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:21,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:25:21,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:25:21,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:21,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:25:21,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:27,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:28,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899519148] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:28,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:28,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:25:28,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290352776] [2024-01-27 15:25:28,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:28,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:25:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:25:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:25:28,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:25:28,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 500 transitions, 7672 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:28,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:28,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:25:28,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:31,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:34,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:43,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:46,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:49,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:50,534 INFO L124 PetriNetUnfolderBase]: 1162/2232 cut-off events. [2024-01-27 15:25:50,535 INFO L125 PetriNetUnfolderBase]: For 82500/82500 co-relation queries the response was YES. [2024-01-27 15:25:50,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19930 conditions, 2232 events. 1162/2232 cut-off events. For 82500/82500 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14073 event pairs, 74 based on Foata normal form. 14/2245 useless extension candidates. Maximal degree in co-relation 19576. Up to 859 conditions per place. [2024-01-27 15:25:50,558 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 389 selfloop transitions, 134 changer transitions 18/544 dead transitions. [2024-01-27 15:25:50,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 544 transitions, 9444 flow [2024-01-27 15:25:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:25:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:25:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 181 transitions. [2024-01-27 15:25:50,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013850415512465 [2024-01-27 15:25:50,562 INFO L175 Difference]: Start difference. First operand has 242 places, 500 transitions, 7672 flow. Second operand 19 states and 181 transitions. [2024-01-27 15:25:50,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 544 transitions, 9444 flow [2024-01-27 15:25:50,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 544 transitions, 8615 flow, removed 329 selfloop flow, removed 14 redundant places. [2024-01-27 15:25:50,821 INFO L231 Difference]: Finished difference. Result has 245 places, 484 transitions, 7111 flow [2024-01-27 15:25:50,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7111, PETRI_PLACES=245, PETRI_TRANSITIONS=484} [2024-01-27 15:25:50,823 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2024-01-27 15:25:50,823 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 484 transitions, 7111 flow [2024-01-27 15:25:50,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:50,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:50,823 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:50,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:51,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:51,032 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:51,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1023430144, now seen corresponding path program 15 times [2024-01-27 15:25:51,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:51,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898250878] [2024-01-27 15:25:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:51,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898250878] [2024-01-27 15:25:51,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898250878] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277594495] [2024-01-27 15:25:51,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:25:51,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:51,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:51,155 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:51,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:25:51,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:25:51,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:51,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:25:51,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:56,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:58,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277594495] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:58,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:58,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:25:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188293970] [2024-01-27 15:25:58,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:25:58,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:25:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:25:58,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:25:58,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 484 transitions, 7111 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:58,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:58,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:25:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:00,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:26:05,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:26:08,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:26:13,098 INFO L124 PetriNetUnfolderBase]: 1254/2441 cut-off events. [2024-01-27 15:26:13,098 INFO L125 PetriNetUnfolderBase]: For 98572/98572 co-relation queries the response was YES. [2024-01-27 15:26:13,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21906 conditions, 2441 events. 1254/2441 cut-off events. For 98572/98572 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 15950 event pairs, 102 based on Foata normal form. 21/2459 useless extension candidates. Maximal degree in co-relation 21230. Up to 1125 conditions per place. [2024-01-27 15:26:13,136 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 443 selfloop transitions, 110 changer transitions 17/573 dead transitions. [2024-01-27 15:26:13,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 573 transitions, 9928 flow [2024-01-27 15:26:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:26:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:26:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 156 transitions. [2024-01-27 15:26:13,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473684210526316 [2024-01-27 15:26:13,138 INFO L175 Difference]: Start difference. First operand has 245 places, 484 transitions, 7111 flow. Second operand 15 states and 156 transitions. [2024-01-27 15:26:13,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 573 transitions, 9928 flow [2024-01-27 15:26:13,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 573 transitions, 9346 flow, removed 152 selfloop flow, removed 11 redundant places. [2024-01-27 15:26:13,396 INFO L231 Difference]: Finished difference. Result has 249 places, 521 transitions, 7672 flow [2024-01-27 15:26:13,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7672, PETRI_PLACES=249, PETRI_TRANSITIONS=521} [2024-01-27 15:26:13,397 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2024-01-27 15:26:13,397 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 521 transitions, 7672 flow [2024-01-27 15:26:13,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:13,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:13,398 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:13,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:13,609 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:13,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1496195129, now seen corresponding path program 16 times [2024-01-27 15:26:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:13,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498532523] [2024-01-27 15:26:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:13,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:13,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:13,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498532523] [2024-01-27 15:26:13,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498532523] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:13,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112255916] [2024-01-27 15:26:13,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:26:13,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:13,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:13,760 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:13,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:26:14,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:26:14,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:14,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:26:14,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:27,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:39,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112255916] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:39,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:39,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-27 15:26:39,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892307251] [2024-01-27 15:26:39,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:39,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:26:39,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:39,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:26:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=252, Unknown=6, NotChecked=0, Total=306 [2024-01-27 15:26:39,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:26:39,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 521 transitions, 7672 flow. Second operand has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:39,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:39,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:26:39,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:02,528 WARN L293 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 44 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:27:07,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:24,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:28,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:32,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:36,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:40,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:44,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:48,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:52,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:56,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:58,239 INFO L124 PetriNetUnfolderBase]: 1174/2251 cut-off events. [2024-01-27 15:27:58,239 INFO L125 PetriNetUnfolderBase]: For 88432/88432 co-relation queries the response was YES. [2024-01-27 15:27:58,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20024 conditions, 2251 events. 1174/2251 cut-off events. For 88432/88432 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14176 event pairs, 60 based on Foata normal form. 44/2292 useless extension candidates. Maximal degree in co-relation 19744. Up to 1383 conditions per place. [2024-01-27 15:27:58,256 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 434 selfloop transitions, 102 changer transitions 42/581 dead transitions. [2024-01-27 15:27:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 581 transitions, 9856 flow [2024-01-27 15:27:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:27:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:27:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 195 transitions. [2024-01-27 15:27:58,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5401662049861495 [2024-01-27 15:27:58,265 INFO L175 Difference]: Start difference. First operand has 249 places, 521 transitions, 7672 flow. Second operand 19 states and 195 transitions. [2024-01-27 15:27:58,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 581 transitions, 9856 flow [2024-01-27 15:27:58,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 581 transitions, 9543 flow, removed 135 selfloop flow, removed 8 redundant places. [2024-01-27 15:27:58,505 INFO L231 Difference]: Finished difference. Result has 255 places, 491 transitions, 7325 flow [2024-01-27 15:27:58,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7325, PETRI_PLACES=255, PETRI_TRANSITIONS=491} [2024-01-27 15:27:58,507 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2024-01-27 15:27:58,507 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 491 transitions, 7325 flow [2024-01-27 15:27:58,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:58,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:58,507 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:58,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:58,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:58,719 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:58,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1314775856, now seen corresponding path program 17 times [2024-01-27 15:27:58,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216206003] [2024-01-27 15:27:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:58,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:27:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216206003] [2024-01-27 15:27:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216206003] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617272420] [2024-01-27 15:27:58,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:27:58,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:58,861 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:58,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:27:59,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:27:59,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:59,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:27:59,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:27:59,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:28:00,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617272420] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:00,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:00,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:28:00,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652268866] [2024-01-27 15:28:00,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:00,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:28:00,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:28:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:28:00,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:28:00,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 491 transitions, 7325 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:00,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:00,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:28:00,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:03,702 INFO L124 PetriNetUnfolderBase]: 1108/2088 cut-off events. [2024-01-27 15:28:03,702 INFO L125 PetriNetUnfolderBase]: For 66011/66011 co-relation queries the response was YES. [2024-01-27 15:28:03,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17890 conditions, 2088 events. 1108/2088 cut-off events. For 66011/66011 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12582 event pairs, 70 based on Foata normal form. 6/2091 useless extension candidates. Maximal degree in co-relation 17664. Up to 933 conditions per place. [2024-01-27 15:28:03,719 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 418 selfloop transitions, 100 changer transitions 13/534 dead transitions. [2024-01-27 15:28:03,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 534 transitions, 9031 flow [2024-01-27 15:28:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:28:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:28:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 159 transitions. [2024-01-27 15:28:03,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49226006191950467 [2024-01-27 15:28:03,751 INFO L175 Difference]: Start difference. First operand has 255 places, 491 transitions, 7325 flow. Second operand 17 states and 159 transitions. [2024-01-27 15:28:03,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 534 transitions, 9031 flow [2024-01-27 15:28:03,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 534 transitions, 8574 flow, removed 174 selfloop flow, removed 17 redundant places. [2024-01-27 15:28:03,933 INFO L231 Difference]: Finished difference. Result has 243 places, 485 transitions, 7276 flow [2024-01-27 15:28:03,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7276, PETRI_PLACES=243, PETRI_TRANSITIONS=485} [2024-01-27 15:28:03,934 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2024-01-27 15:28:03,934 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 485 transitions, 7276 flow [2024-01-27 15:28:03,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:03,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:03,935 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:03,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-27 15:28:04,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:04,145 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:04,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash -790293456, now seen corresponding path program 18 times [2024-01-27 15:28:04,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:04,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139655112] [2024-01-27 15:28:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:28:04,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:04,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139655112] [2024-01-27 15:28:04,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139655112] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:04,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094300363] [2024-01-27 15:28:04,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:28:04,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:04,275 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:04,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:28:04,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:28:04,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:04,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:28:04,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:28:20,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:28:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094300363] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:35,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:35,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 20 [2024-01-27 15:28:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230578438] [2024-01-27 15:28:35,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:35,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:28:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:28:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=333, Unknown=4, NotChecked=0, Total=420 [2024-01-27 15:28:35,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:28:35,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 485 transitions, 7276 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:35,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:35,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:28:35,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15