./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:30:45,587 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:30:45,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:30:45,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:30:45,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:30:45,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:30:45,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:30:45,675 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:30:45,676 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:30:45,677 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:30:45,677 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:30:45,677 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:30:45,678 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:30:45,679 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:30:45,679 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:30:45,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:30:45,680 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:30:45,680 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:30:45,680 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:30:45,681 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:30:45,681 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:30:45,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:30:45,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:30:45,684 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:30:45,684 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:30:45,685 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:30:45,685 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:30:45,685 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:30:45,685 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:30:45,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:30:45,686 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:30:45,686 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:30:45,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:30:45,686 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:30:45,686 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:30:45,687 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:30:45,687 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:30:45,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:30:45,688 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:30:45,688 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:30:45,688 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:30:45,689 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:30:45,689 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-10-11 14:30:45,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:30:45,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:30:45,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:30:45,912 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:30:45,912 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:30:45,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-10-11 14:30:47,124 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:30:47,284 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:30:47,284 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-10-11 14:30:47,293 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/abe38840d/c4e38583ad794d2cbd7dbfb45d8694ec/FLAG55d712b4b [2024-10-11 14:30:47,683 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/abe38840d/c4e38583ad794d2cbd7dbfb45d8694ec [2024-10-11 14:30:47,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:30:47,686 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:30:47,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:30:47,689 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:30:47,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:30:47,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:47,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f182aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47, skipping insertion in model container [2024-10-11 14:30:47,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:47,712 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:30:47,879 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2024-10-11 14:30:47,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:30:47,892 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:30:47,923 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2024-10-11 14:30:47,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:30:47,946 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:30:47,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47 WrapperNode [2024-10-11 14:30:47,951 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:30:47,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:30:47,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:30:47,952 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:30:47,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:47,973 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:47,993 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 272 [2024-10-11 14:30:47,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:30:47,998 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:30:47,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:30:47,998 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:30:48,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,009 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,020 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-11 14:30:48,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:30:48,043 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:30:48,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:30:48,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:30:48,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (1/1) ... [2024-10-11 14:30:48,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:30:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:48,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:30:48,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:30:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:30:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:30:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:30:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:30:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:30:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:30:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:30:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:30:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:30:48,102 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:30:48,186 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:30:48,187 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:30:48,501 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:30:48,503 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:30:48,702 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:30:48,703 INFO L314 CfgBuilder]: Removed 8 assume(true) statements. [2024-10-11 14:30:48,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:48 BoogieIcfgContainer [2024-10-11 14:30:48,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:30:48,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:30:48,705 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:30:48,709 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:30:48,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:47" (1/3) ... [2024-10-11 14:30:48,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f4ee43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:48, skipping insertion in model container [2024-10-11 14:30:48,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:47" (2/3) ... [2024-10-11 14:30:48,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f4ee43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:48, skipping insertion in model container [2024-10-11 14:30:48,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:48" (3/3) ... [2024-10-11 14:30:48,711 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-10-11 14:30:48,752 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:30:48,752 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:30:48,752 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:30:48,798 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 14:30:48,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 50 transitions, 121 flow [2024-10-11 14:30:48,857 INFO L124 PetriNetUnfolderBase]: 11/47 cut-off events. [2024-10-11 14:30:48,857 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:30:48,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 11/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-10-11 14:30:48,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 50 transitions, 121 flow [2024-10-11 14:30:48,865 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 46 transitions, 110 flow [2024-10-11 14:30:48,876 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:30:48,882 INFO L333 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, 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;@1c5cd12b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:30:48,883 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:30:48,897 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:30:48,898 INFO L124 PetriNetUnfolderBase]: 11/45 cut-off events. [2024-10-11 14:30:48,898 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:30:48,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:48,899 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:48,899 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:48,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -643790171, now seen corresponding path program 1 times [2024-10-11 14:30:48,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:48,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060846299] [2024-10-11 14:30:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:48,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:49,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:49,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060846299] [2024-10-11 14:30:49,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060846299] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:49,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:49,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:30:49,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701341378] [2024-10-11 14:30:49,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:49,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:30:49,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:49,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:30:49,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:30:49,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-11 14:30:49,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:49,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:49,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-11 14:30:49,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:49,731 INFO L124 PetriNetUnfolderBase]: 2373/3340 cut-off events. [2024-10-11 14:30:49,731 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-10-11 14:30:49,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 3340 events. 2373/3340 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15242 event pairs, 1692 based on Foata normal form. 339/2982 useless extension candidates. Maximal degree in co-relation 6310. Up to 3232 conditions per place. [2024-10-11 14:30:49,753 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 38 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2024-10-11 14:30:49,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 198 flow [2024-10-11 14:30:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:30:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:30:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-10-11 14:30:49,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.332 [2024-10-11 14:30:49,766 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 110 flow. Second operand 5 states and 83 transitions. [2024-10-11 14:30:49,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 198 flow [2024-10-11 14:30:49,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 186 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 14:30:49,775 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 110 flow [2024-10-11 14:30:49,777 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-10-11 14:30:49,781 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2024-10-11 14:30:49,781 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 110 flow [2024-10-11 14:30:49,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:49,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:49,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:49,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:30:49,782 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:49,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 389702561, now seen corresponding path program 1 times [2024-10-11 14:30:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:49,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961065182] [2024-10-11 14:30:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:49,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:49,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:49,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961065182] [2024-10-11 14:30:49,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961065182] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:49,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564941263] [2024-10-11 14:30:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:49,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:49,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:49,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:49,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:30:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:50,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:30:50,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:50,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:50,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564941263] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:50,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:30:50,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-10-11 14:30:50,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289497567] [2024-10-11 14:30:50,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:50,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:30:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:30:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:30:50,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-11 14:30:50,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:50,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:50,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-11 14:30:50,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:50,369 INFO L124 PetriNetUnfolderBase]: 2677/3766 cut-off events. [2024-10-11 14:30:50,369 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-11 14:30:50,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7496 conditions, 3766 events. 2677/3766 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17544 event pairs, 794 based on Foata normal form. 0/3023 useless extension candidates. Maximal degree in co-relation 7483. Up to 2323 conditions per place. [2024-10-11 14:30:50,400 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 57 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-10-11 14:30:50,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 280 flow [2024-10-11 14:30:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:30:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:30:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-10-11 14:30:50,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.392 [2024-10-11 14:30:50,403 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 110 flow. Second operand 5 states and 98 transitions. [2024-10-11 14:30:50,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 280 flow [2024-10-11 14:30:50,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 270 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-11 14:30:50,406 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 123 flow [2024-10-11 14:30:50,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-10-11 14:30:50,406 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-11 14:30:50,406 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 123 flow [2024-10-11 14:30:50,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:50,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:50,407 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:50,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:30:50,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:50,608 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:50,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:50,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1767188247, now seen corresponding path program 1 times [2024-10-11 14:30:50,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:50,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169315879] [2024-10-11 14:30:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:30:50,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:50,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169315879] [2024-10-11 14:30:50,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169315879] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:50,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691910479] [2024-10-11 14:30:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:50,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:50,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:50,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:30:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:50,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:30:50,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:30:50,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:30:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691910479] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:50,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:50,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-10-11 14:30:50,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761801304] [2024-10-11 14:30:50,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:50,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:30:50,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:30:50,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:30:50,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-11 14:30:50,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2024-10-11 14:30:50,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:50,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-11 14:30:50,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:51,212 INFO L124 PetriNetUnfolderBase]: 3003/4236 cut-off events. [2024-10-11 14:30:51,213 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-10-11 14:30:51,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9433 conditions, 4236 events. 3003/4236 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20053 event pairs, 881 based on Foata normal form. 0/3555 useless extension candidates. Maximal degree in co-relation 9414. Up to 2470 conditions per place. [2024-10-11 14:30:51,231 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 58 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-10-11 14:30:51,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 307 flow [2024-10-11 14:30:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:30:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:30:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-10-11 14:30:51,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-10-11 14:30:51,234 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 123 flow. Second operand 4 states and 88 transitions. [2024-10-11 14:30:51,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 307 flow [2024-10-11 14:30:51,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 298 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 14:30:51,236 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 138 flow [2024-10-11 14:30:51,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-10-11 14:30:51,236 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2024-10-11 14:30:51,237 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 138 flow [2024-10-11 14:30:51,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2024-10-11 14:30:51,237 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:51,237 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:51,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:30:51,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:51,439 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:51,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1329234884, now seen corresponding path program 1 times [2024-10-11 14:30:51,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:51,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168631904] [2024-10-11 14:30:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:51,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:30:51,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:51,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168631904] [2024-10-11 14:30:51,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168631904] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:51,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:51,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:30:51,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336941390] [2024-10-11 14:30:51,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:51,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:30:51,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:30:51,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:30:51,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-11 14:30:51,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:51,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:51,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-11 14:30:51,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:51,925 INFO L124 PetriNetUnfolderBase]: 5022/7069 cut-off events. [2024-10-11 14:30:51,925 INFO L125 PetriNetUnfolderBase]: For 3084/3084 co-relation queries the response was YES. [2024-10-11 14:30:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17044 conditions, 7069 events. 5022/7069 cut-off events. For 3084/3084 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35836 event pairs, 1438 based on Foata normal form. 1/6066 useless extension candidates. Maximal degree in co-relation 17024. Up to 4351 conditions per place. [2024-10-11 14:30:51,951 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 68 selfloop transitions, 4 changer transitions 1/77 dead transitions. [2024-10-11 14:30:51,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 380 flow [2024-10-11 14:30:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:30:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:30:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-10-11 14:30:51,952 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-10-11 14:30:51,952 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 138 flow. Second operand 3 states and 90 transitions. [2024-10-11 14:30:51,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 380 flow [2024-10-11 14:30:51,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:30:51,960 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 160 flow [2024-10-11 14:30:51,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-10-11 14:30:51,961 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-10-11 14:30:51,961 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 160 flow [2024-10-11 14:30:51,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:51,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:51,961 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:51,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:30:51,962 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:51,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1146571422, now seen corresponding path program 1 times [2024-10-11 14:30:51,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:51,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311909417] [2024-10-11 14:30:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:51,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311909417] [2024-10-11 14:30:52,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311909417] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:52,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:30:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637520049] [2024-10-11 14:30:52,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:52,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:30:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:30:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:30:52,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-11 14:30:52,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:52,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:52,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-11 14:30:52,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:53,023 INFO L124 PetriNetUnfolderBase]: 9996/13941 cut-off events. [2024-10-11 14:30:53,023 INFO L125 PetriNetUnfolderBase]: For 6351/6351 co-relation queries the response was YES. [2024-10-11 14:30:53,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34832 conditions, 13941 events. 9996/13941 cut-off events. For 6351/6351 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 76091 event pairs, 5933 based on Foata normal form. 0/12116 useless extension candidates. Maximal degree in co-relation 34810. Up to 7669 conditions per place. [2024-10-11 14:30:53,082 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 124 selfloop transitions, 8 changer transitions 0/135 dead transitions. [2024-10-11 14:30:53,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 135 transitions, 692 flow [2024-10-11 14:30:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:30:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:30:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-10-11 14:30:53,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-10-11 14:30:53,085 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 160 flow. Second operand 6 states and 153 transitions. [2024-10-11 14:30:53,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 135 transitions, 692 flow [2024-10-11 14:30:53,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 135 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:30:53,096 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 226 flow [2024-10-11 14:30:53,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-10-11 14:30:53,097 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-10-11 14:30:53,098 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 226 flow [2024-10-11 14:30:53,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:53,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:53,098 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:53,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:30:53,099 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:53,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1360117292, now seen corresponding path program 1 times [2024-10-11 14:30:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:53,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590600048] [2024-10-11 14:30:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:53,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:30:53,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:53,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590600048] [2024-10-11 14:30:53,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590600048] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:53,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:53,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:30:53,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461737133] [2024-10-11 14:30:53,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:53,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:30:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:30:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:30:53,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-11 14:30:53,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:53,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:53,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-11 14:30:53,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:54,197 INFO L124 PetriNetUnfolderBase]: 8807/12260 cut-off events. [2024-10-11 14:30:54,198 INFO L125 PetriNetUnfolderBase]: For 11268/11457 co-relation queries the response was YES. [2024-10-11 14:30:54,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33278 conditions, 12260 events. 8807/12260 cut-off events. For 11268/11457 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 64471 event pairs, 5542 based on Foata normal form. 189/10956 useless extension candidates. Maximal degree in co-relation 33251. Up to 7624 conditions per place. [2024-10-11 14:30:54,257 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 108 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2024-10-11 14:30:54,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 120 transitions, 686 flow [2024-10-11 14:30:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:30:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:30:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-10-11 14:30:54,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-10-11 14:30:54,259 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 226 flow. Second operand 6 states and 140 transitions. [2024-10-11 14:30:54,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 120 transitions, 686 flow [2024-10-11 14:30:54,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 120 transitions, 682 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:30:54,274 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 279 flow [2024-10-11 14:30:54,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-10-11 14:30:54,275 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-10-11 14:30:54,275 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 279 flow [2024-10-11 14:30:54,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:30:54,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:54,276 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:54,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:30:54,276 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:54,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash 292540957, now seen corresponding path program 1 times [2024-10-11 14:30:54,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:54,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218625030] [2024-10-11 14:30:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:54,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:54,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218625030] [2024-10-11 14:30:54,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218625030] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170747137] [2024-10-11 14:30:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:54,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:54,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:54,483 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:54,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:30:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:54,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:30:54,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:54,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-10-11 14:30:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:54,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:54,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2024-10-11 14:30:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170747137] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:54,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:54,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:30:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346526205] [2024-10-11 14:30:54,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:54,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:30:54,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:30:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:30:54,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-11 14:30:54,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 279 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-11 14:30:54,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:54,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-11 14:30:54,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:56,171 INFO L124 PetriNetUnfolderBase]: 13231/18633 cut-off events. [2024-10-11 14:30:56,171 INFO L125 PetriNetUnfolderBase]: For 19078/19200 co-relation queries the response was YES. [2024-10-11 14:30:56,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53928 conditions, 18633 events. 13231/18633 cut-off events. For 19078/19200 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 106860 event pairs, 7388 based on Foata normal form. 122/16531 useless extension candidates. Maximal degree in co-relation 53897. Up to 7669 conditions per place. [2024-10-11 14:30:56,279 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 136 selfloop transitions, 15 changer transitions 0/155 dead transitions. [2024-10-11 14:30:56,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 155 transitions, 951 flow [2024-10-11 14:30:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:30:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:30:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-10-11 14:30:56,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-10-11 14:30:56,281 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 279 flow. Second operand 7 states and 161 transitions. [2024-10-11 14:30:56,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 155 transitions, 951 flow [2024-10-11 14:30:56,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 155 transitions, 946 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:30:56,388 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 383 flow [2024-10-11 14:30:56,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-10-11 14:30:56,389 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-10-11 14:30:56,389 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 383 flow [2024-10-11 14:30:56,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-11 14:30:56,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:56,390 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:56,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:30:56,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:56,594 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:56,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1332575869, now seen corresponding path program 1 times [2024-10-11 14:30:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:56,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707408541] [2024-10-11 14:30:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:56,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:56,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:56,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707408541] [2024-10-11 14:30:56,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707408541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:56,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268479487] [2024-10-11 14:30:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:56,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:56,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:56,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:56,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:30:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:56,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:30:56,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:56,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-10-11 14:30:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:56,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:56,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2024-10-11 14:30:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268479487] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:56,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:56,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:30:56,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923606170] [2024-10-11 14:30:56,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:56,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:30:56,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:56,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:30:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:30:57,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-11 14:30:57,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 383 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-11 14:30:57,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:57,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-11 14:30:57,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:58,440 INFO L124 PetriNetUnfolderBase]: 12016/16800 cut-off events. [2024-10-11 14:30:58,440 INFO L125 PetriNetUnfolderBase]: For 33328/33895 co-relation queries the response was YES. [2024-10-11 14:30:58,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53542 conditions, 16800 events. 12016/16800 cut-off events. For 33328/33895 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 92886 event pairs, 7043 based on Foata normal form. 567/15452 useless extension candidates. Maximal degree in co-relation 53507. Up to 7624 conditions per place. [2024-10-11 14:30:58,515 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 120 selfloop transitions, 15 changer transitions 0/140 dead transitions. [2024-10-11 14:30:58,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 140 transitions, 1003 flow [2024-10-11 14:30:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:30:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:30:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-10-11 14:30:58,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2024-10-11 14:30:58,516 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 383 flow. Second operand 7 states and 148 transitions. [2024-10-11 14:30:58,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 140 transitions, 1003 flow [2024-10-11 14:30:58,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 140 transitions, 980 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-10-11 14:30:58,589 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 452 flow [2024-10-11 14:30:58,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=452, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2024-10-11 14:30:58,590 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-10-11 14:30:58,590 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 452 flow [2024-10-11 14:30:58,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-11 14:30:58,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:58,590 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:58,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:30:58,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 14:30:58,795 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:30:58,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1929539554, now seen corresponding path program 2 times [2024-10-11 14:30:58,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:58,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299765688] [2024-10-11 14:30:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:58,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:59,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:59,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299765688] [2024-10-11 14:30:59,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299765688] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:59,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781650826] [2024-10-11 14:30:59,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:30:59,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:59,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:59,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:30:59,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:30:59,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:30:59,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:30:59,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:59,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 14:30:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:30:59,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:59,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:30:59,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2024-10-11 14:31:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:31:00,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781650826] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:00,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:00,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2024-10-11 14:31:00,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214891965] [2024-10-11 14:31:00,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:00,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-11 14:31:00,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-11 14:31:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2024-10-11 14:31:00,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 50 [2024-10-11 14:31:00,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 452 flow. Second operand has 37 states, 37 states have (on average 7.351351351351352) internal successors, (272), 37 states have internal predecessors, (272), 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) [2024-10-11 14:31:00,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:00,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 50 [2024-10-11 14:31:00,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:08,657 INFO L124 PetriNetUnfolderBase]: 62311/85567 cut-off events. [2024-10-11 14:31:08,657 INFO L125 PetriNetUnfolderBase]: For 130462/130462 co-relation queries the response was YES. [2024-10-11 14:31:08,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272229 conditions, 85567 events. 62311/85567 cut-off events. For 130462/130462 co-relation queries the response was YES. Maximal size of possible extension queue 2307. Compared 549381 event pairs, 23296 based on Foata normal form. 0/74661 useless extension candidates. Maximal degree in co-relation 208929. Up to 18894 conditions per place. [2024-10-11 14:31:09,193 INFO L140 encePairwiseOnDemand]: 31/50 looper letters, 816 selfloop transitions, 107 changer transitions 0/925 dead transitions. [2024-10-11 14:31:09,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 925 transitions, 5881 flow [2024-10-11 14:31:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-11 14:31:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-10-11 14:31:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 1002 transitions. [2024-10-11 14:31:09,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47714285714285715 [2024-10-11 14:31:09,196 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 452 flow. Second operand 42 states and 1002 transitions. [2024-10-11 14:31:09,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 925 transitions, 5881 flow [2024-10-11 14:31:11,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 925 transitions, 5597 flow, removed 134 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:11,648 INFO L231 Difference]: Finished difference. Result has 153 places, 178 transitions, 1623 flow [2024-10-11 14:31:11,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1623, PETRI_PLACES=153, PETRI_TRANSITIONS=178} [2024-10-11 14:31:11,649 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-10-11 14:31:11,649 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 178 transitions, 1623 flow [2024-10-11 14:31:11,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 7.351351351351352) internal successors, (272), 37 states have internal predecessors, (272), 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) [2024-10-11 14:31:11,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:11,649 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:11,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:11,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:11,851 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:31:11,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2143374978, now seen corresponding path program 2 times [2024-10-11 14:31:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:11,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3724579] [2024-10-11 14:31:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:31:12,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3724579] [2024-10-11 14:31:12,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3724579] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062597996] [2024-10-11 14:31:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:12,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:12,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:12,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:31:12,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:12,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:31:12,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:12,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 14:31:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:31:12,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:12,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:31:12,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-10-11 14:31:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:31:12,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062597996] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:12,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:12,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-10-11 14:31:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003697070] [2024-10-11 14:31:12,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:12,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 14:31:12,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 14:31:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2024-10-11 14:31:12,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 50 [2024-10-11 14:31:12,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 178 transitions, 1623 flow. Second operand has 32 states, 32 states have (on average 7.25) internal successors, (232), 32 states have internal predecessors, (232), 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) [2024-10-11 14:31:12,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:12,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 50 [2024-10-11 14:31:12,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:24,342 INFO L124 PetriNetUnfolderBase]: 73272/100416 cut-off events. [2024-10-11 14:31:24,342 INFO L125 PetriNetUnfolderBase]: For 756671/756671 co-relation queries the response was YES. [2024-10-11 14:31:25,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482338 conditions, 100416 events. 73272/100416 cut-off events. For 756671/756671 co-relation queries the response was YES. Maximal size of possible extension queue 2881. Compared 664486 event pairs, 21320 based on Foata normal form. 0/88424 useless extension candidates. Maximal degree in co-relation 418990. Up to 21904 conditions per place. [2024-10-11 14:31:25,395 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 517 selfloop transitions, 76 changer transitions 0/595 dead transitions. [2024-10-11 14:31:25,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 595 transitions, 6317 flow [2024-10-11 14:31:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:31:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:31:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 399 transitions. [2024-10-11 14:31:25,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46941176470588236 [2024-10-11 14:31:25,397 INFO L175 Difference]: Start difference. First operand has 153 places, 178 transitions, 1623 flow. Second operand 17 states and 399 transitions. [2024-10-11 14:31:25,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 595 transitions, 6317 flow [2024-10-11 14:31:35,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 595 transitions, 6127 flow, removed 94 selfloop flow, removed 1 redundant places. [2024-10-11 14:31:35,102 INFO L231 Difference]: Finished difference. Result has 177 places, 217 transitions, 2250 flow [2024-10-11 14:31:35,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2250, PETRI_PLACES=177, PETRI_TRANSITIONS=217} [2024-10-11 14:31:35,104 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-10-11 14:31:35,104 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 217 transitions, 2250 flow [2024-10-11 14:31:35,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.25) internal successors, (232), 32 states have internal predecessors, (232), 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) [2024-10-11 14:31:35,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:35,105 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:35,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:31:35,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:31:35,306 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:31:35,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:35,306 INFO L85 PathProgramCache]: Analyzing trace with hash -682567336, now seen corresponding path program 3 times [2024-10-11 14:31:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:35,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314997196] [2024-10-11 14:31:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:35,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:31:35,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:35,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314997196] [2024-10-11 14:31:35,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314997196] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:35,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105462948] [2024-10-11 14:31:35,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:31:35,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:35,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:35,711 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:35,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:31:35,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:31:35,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:35,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:31:35,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:36,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 14:31:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:31:36,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:36,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:31:36,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2024-10-11 14:31:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:31:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105462948] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:36,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:36,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2024-10-11 14:31:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241498193] [2024-10-11 14:31:36,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:36,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 14:31:36,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 14:31:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 14:31:36,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 50 [2024-10-11 14:31:36,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 217 transitions, 2250 flow. Second operand has 33 states, 33 states have (on average 7.515151515151516) internal successors, (248), 33 states have internal predecessors, (248), 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) [2024-10-11 14:31:36,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:36,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 50 [2024-10-11 14:31:36,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand