./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:11:41,779 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:11:41,867 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:11:41,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:11:41,873 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:11:41,903 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:11:41,905 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:11:41,905 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:11:41,906 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:11:41,909 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:11:41,910 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:11:41,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:11:41,911 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:11:41,912 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:11:41,912 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:11:41,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:11:41,913 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:11:41,913 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:11:41,913 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:11:41,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:11:41,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:11:41,915 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:11:41,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:11:41,915 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:11:41,915 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:11:41,916 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:11:41,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:11:41,916 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:11:41,917 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:11:41,917 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:11:41,918 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:11:41,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:11:41,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:11:41,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:11:41,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:11:41,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:11:41,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:11:41,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:11:41,920 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:11:41,920 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:11:41,920 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:11:41,921 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:11:41,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:11:41,921 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:11:42,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:11:42,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:11:42,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:11:42,199 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:11:42,200 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:11:42,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2024-02-20 12:11:43,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:11:44,091 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:11:44,091 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2024-02-20 12:11:44,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b6d24bc/c50499f7b974425eb13255a41db45766/FLAG19de6a57a [2024-02-20 12:11:44,118 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b6d24bc/c50499f7b974425eb13255a41db45766 [2024-02-20 12:11:44,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:11:44,122 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:11:44,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:11:44,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:11:44,130 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:11:44,131 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf0dbba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44, skipping insertion in model container [2024-02-20 12:11:44,132 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,157 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:11:44,394 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2024-02-20 12:11:44,415 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:11:44,436 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:11:44,488 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2024-02-20 12:11:44,496 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:11:44,545 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:11:44,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44 WrapperNode [2024-02-20 12:11:44,546 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:11:44,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:11:44,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:11:44,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:11:44,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,649 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 254 [2024-02-20 12:11:44,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:11:44,651 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:11:44,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:11:44,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:11:44,662 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,678 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,737 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 7, 2, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 2, 1, 1, 1]. [2024-02-20 12:11:44,737 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,737 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,751 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,757 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:11:44,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:11:44,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:11:44,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:11:44,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (1/1) ... [2024-02-20 12:11:44,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:11:44,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:44,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 12:11:44,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 12:11:44,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:11:44,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:11:44,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:11:44,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:11:44,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:11:44,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 12:11:44,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 12:11:44,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:11:44,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:11:44,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:11:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 12:11:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-20 12:11:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:11:44,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:11:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:11:44,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:11:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-20 12:11:44,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-20 12:11:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:11:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:11:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:11:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 12:11:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 12:11:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:11:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:11:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-20 12:11:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:11:44,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:11:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:11:44,974 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:11:45,092 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:11:45,094 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:11:45,384 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:11:45,384 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:11:45,921 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:11:45,921 INFO L320 CfgBuilder]: Removed 5 assume(true) statements. [2024-02-20 12:11:45,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:11:45 BoogieIcfgContainer [2024-02-20 12:11:45,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:11:45,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:11:45,923 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:11:45,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:11:45,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:11:44" (1/3) ... [2024-02-20 12:11:45,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cae7d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:11:45, skipping insertion in model container [2024-02-20 12:11:45,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:44" (2/3) ... [2024-02-20 12:11:45,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cae7d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:11:45, skipping insertion in model container [2024-02-20 12:11:45,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:11:45" (3/3) ... [2024-02-20 12:11:45,929 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2024-02-20 12:11:45,943 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:11:45,952 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:11:45,952 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:11:46,015 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-20 12:11:46,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 46 transitions, 113 flow [2024-02-20 12:11:46,099 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2024-02-20 12:11:46,099 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-20 12:11:46,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 7/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-02-20 12:11:46,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 46 transitions, 113 flow [2024-02-20 12:11:46,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 42 transitions, 102 flow [2024-02-20 12:11:46,119 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:11:46,125 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@561a2543, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:11:46,125 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-20 12:11:46,161 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:11:46,162 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-02-20 12:11:46,162 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-20 12:11:46,162 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:46,163 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:46,163 INFO L432 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)] === [2024-02-20 12:11:46,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:46,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1822941260, now seen corresponding path program 1 times [2024-02-20 12:11:46,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:46,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219783019] [2024-02-20 12:11:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:46,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:46,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:46,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219783019] [2024-02-20 12:11:46,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219783019] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:46,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:46,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:11:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591809536] [2024-02-20 12:11:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:46,712 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-20 12:11:46,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-20 12:11:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-20 12:11:46,779 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-20 12:11:46,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:46,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:46,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-20 12:11:46,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:47,184 INFO L124 PetriNetUnfolderBase]: 507/983 cut-off events. [2024-02-20 12:11:47,185 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-02-20 12:11:47,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 983 events. 507/983 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5576 event pairs, 376 based on Foata normal form. 153/1008 useless extension candidates. Maximal degree in co-relation 1612. Up to 735 conditions per place. [2024-02-20 12:11:47,212 INFO L140 encePairwiseOnDemand]: 44/46 looper letters, 27 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2024-02-20 12:11:47,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 152 flow [2024-02-20 12:11:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-20 12:11:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-20 12:11:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 61 transitions. [2024-02-20 12:11:47,232 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-02-20 12:11:47,235 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2024-02-20 12:11:47,248 INFO L507 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 152 flow [2024-02-20 12:11:47,249 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:47,249 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:47,249 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:47,249 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:11:47,250 INFO L432 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)] === [2024-02-20 12:11:47,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash 53960702, now seen corresponding path program 1 times [2024-02-20 12:11:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:47,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051967809] [2024-02-20 12:11:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:47,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051967809] [2024-02-20 12:11:47,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051967809] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:47,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:47,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:11:47,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627412000] [2024-02-20 12:11:47,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:47,553 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:11:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:11:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:11:47,554 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-20 12:11:47,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:47,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:47,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-20 12:11:47,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:47,713 INFO L124 PetriNetUnfolderBase]: 431/842 cut-off events. [2024-02-20 12:11:47,714 INFO L125 PetriNetUnfolderBase]: For 185/291 co-relation queries the response was YES. [2024-02-20 12:11:47,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 842 events. 431/842 cut-off events. For 185/291 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4558 event pairs, 103 based on Foata normal form. 12/790 useless extension candidates. Maximal degree in co-relation 1961. Up to 655 conditions per place. [2024-02-20 12:11:47,720 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 34 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-02-20 12:11:47,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 272 flow [2024-02-20 12:11:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:11:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:11:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-02-20 12:11:47,724 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-02-20 12:11:47,724 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-02-20 12:11:47,725 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 272 flow [2024-02-20 12:11:47,725 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:47,725 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:47,725 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:47,726 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:11:47,727 INFO L432 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)] === [2024-02-20 12:11:47,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:47,729 INFO L85 PathProgramCache]: Analyzing trace with hash 511651124, now seen corresponding path program 2 times [2024-02-20 12:11:47,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:47,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359319974] [2024-02-20 12:11:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:47,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:47,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:47,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359319974] [2024-02-20 12:11:47,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359319974] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:47,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:47,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:11:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662152304] [2024-02-20 12:11:47,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:47,863 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:11:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:11:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:11:47,865 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-20 12:11:47,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:47,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:47,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-20 12:11:47,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:48,010 INFO L124 PetriNetUnfolderBase]: 430/895 cut-off events. [2024-02-20 12:11:48,011 INFO L125 PetriNetUnfolderBase]: For 486/574 co-relation queries the response was YES. [2024-02-20 12:11:48,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 895 events. 430/895 cut-off events. For 486/574 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4796 event pairs, 71 based on Foata normal form. 24/853 useless extension candidates. Maximal degree in co-relation 2537. Up to 646 conditions per place. [2024-02-20 12:11:48,019 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 45 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-20 12:11:48,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 432 flow [2024-02-20 12:11:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:11:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:11:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-02-20 12:11:48,022 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-02-20 12:11:48,024 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-02-20 12:11:48,024 INFO L507 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 432 flow [2024-02-20 12:11:48,024 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:48,024 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:48,025 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:48,025 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 12:11:48,025 INFO L432 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)] === [2024-02-20 12:11:48,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash 526608470, now seen corresponding path program 3 times [2024-02-20 12:11:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:48,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383034557] [2024-02-20 12:11:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:48,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:48,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:48,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383034557] [2024-02-20 12:11:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383034557] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:48,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:11:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305437316] [2024-02-20 12:11:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:48,235 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:11:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:11:48,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:11:48,237 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-20 12:11:48,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:48,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:48,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-20 12:11:48,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:48,415 INFO L124 PetriNetUnfolderBase]: 437/928 cut-off events. [2024-02-20 12:11:48,415 INFO L125 PetriNetUnfolderBase]: For 869/915 co-relation queries the response was YES. [2024-02-20 12:11:48,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 928 events. 437/928 cut-off events. For 869/915 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4982 event pairs, 76 based on Foata normal form. 11/872 useless extension candidates. Maximal degree in co-relation 3100. Up to 669 conditions per place. [2024-02-20 12:11:48,423 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 46 selfloop transitions, 2 changer transitions 12/73 dead transitions. [2024-02-20 12:11:48,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 665 flow [2024-02-20 12:11:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-02-20 12:11:48,427 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-02-20 12:11:48,429 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-02-20 12:11:48,429 INFO L507 AbstractCegarLoop]: Abstraction has has 54 places, 73 transitions, 665 flow [2024-02-20 12:11:48,429 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:48,429 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:48,430 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:48,430 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 12:11:48,430 INFO L432 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)] === [2024-02-20 12:11:48,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:48,430 INFO L85 PathProgramCache]: Analyzing trace with hash 603343860, now seen corresponding path program 1 times [2024-02-20 12:11:48,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:48,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704417802] [2024-02-20 12:11:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:48,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:11:48,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:48,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704417802] [2024-02-20 12:11:48,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704417802] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:48,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:48,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 12:11:48,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369666055] [2024-02-20 12:11:48,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:48,614 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:11:48,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:11:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:11:48,617 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-20 12:11:48,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 73 transitions, 665 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:48,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:48,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-20 12:11:48,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:49,420 INFO L124 PetriNetUnfolderBase]: 520/1119 cut-off events. [2024-02-20 12:11:49,420 INFO L125 PetriNetUnfolderBase]: For 1530/1610 co-relation queries the response was YES. [2024-02-20 12:11:49,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5435 conditions, 1119 events. 520/1119 cut-off events. For 1530/1610 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6309 event pairs, 100 based on Foata normal form. 22/1072 useless extension candidates. Maximal degree in co-relation 3663. Up to 833 conditions per place. [2024-02-20 12:11:49,445 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 45 selfloop transitions, 4 changer transitions 42/104 dead transitions. [2024-02-20 12:11:49,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 104 transitions, 1184 flow [2024-02-20 12:11:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-02-20 12:11:49,447 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-02-20 12:11:49,449 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-02-20 12:11:49,449 INFO L507 AbstractCegarLoop]: Abstraction has has 58 places, 104 transitions, 1184 flow [2024-02-20 12:11:49,450 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:49,450 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:49,450 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:49,450 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 12:11:49,450 INFO L432 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)] === [2024-02-20 12:11:49,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:49,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1183497801, now seen corresponding path program 1 times [2024-02-20 12:11:49,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:49,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322118790] [2024-02-20 12:11:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:49,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:52,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:52,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322118790] [2024-02-20 12:11:52,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322118790] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:52,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232266196] [2024-02-20 12:11:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:52,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:52,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:52,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:11:52,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:11:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:52,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 52 conjunts are in the unsatisfiable core [2024-02-20 12:11:52,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:52,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-02-20 12:11:52,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-02-20 12:11:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-02-20 12:11:52,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-02-20 12:11:52,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-02-20 12:11:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-02-20 12:11:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-02-20 12:11:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-02-20 12:11:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-02-20 12:11:52,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-02-20 12:11:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:52,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-02-20 12:11:53,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:53,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-02-20 12:11:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:53,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:53,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:53,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 12:11:53,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:11:53,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-02-20 12:11:53,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-20 12:11:53,139 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-02-20 12:11:53,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-02-20 12:11:53,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-20 12:11:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:54,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:58,274 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-02-20 12:11:58,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 367 treesize of output 377 [2024-02-20 12:11:58,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:11:58,300 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 199 treesize of output 197 [2024-02-20 12:11:58,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-02-20 12:11:58,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:11:58,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 172 [2024-02-20 12:11:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:59,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232266196] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:59,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:59,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-02-20 12:11:59,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289292852] [2024-02-20 12:11:59,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:59,688 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-02-20 12:11:59,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-02-20 12:11:59,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2024-02-20 12:12:03,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-20 12:12:04,060 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-02-20 12:12:04,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 104 transitions, 1184 flow. Second operand has 37 states, 37 states have (on average 11.297297297297296) internal successors, (418), 37 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:12:04,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:12:04,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-02-20 12:12:04,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:12:32,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-20 12:12:36,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-20 12:12:55,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-02-20 12:13:07,031 INFO L124 PetriNetUnfolderBase]: 5197/8605 cut-off events. [2024-02-20 12:13:07,032 INFO L125 PetriNetUnfolderBase]: For 32483/32613 co-relation queries the response was YES. [2024-02-20 12:13:07,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45781 conditions, 8605 events. 5197/8605 cut-off events. For 32483/32613 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 52975 event pairs, 448 based on Foata normal form. 2/8395 useless extension candidates. Maximal degree in co-relation 21305. Up to 5675 conditions per place. [2024-02-20 12:13:07,128 INFO L140 encePairwiseOnDemand]: 30/46 looper letters, 387 selfloop transitions, 104 changer transitions 181/678 dead transitions. [2024-02-20 12:13:07,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 678 transitions, 8989 flow [2024-02-20 12:13:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-02-20 12:13:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-02-20 12:13:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 1011 transitions. [2024-02-20 12:13:07,133 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.399604743083004 [2024-02-20 12:13:07,135 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-02-20 12:13:07,135 INFO L507 AbstractCegarLoop]: Abstraction has has 112 places, 678 transitions, 8989 flow [2024-02-20 12:13:07,136 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 11.297297297297296) internal successors, (418), 37 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:07,136 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:07,136 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:13:07,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:13:07,350 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-20 12:13:07,351 INFO L432 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)] === [2024-02-20 12:13:07,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash 813702865, now seen corresponding path program 2 times [2024-02-20 12:13:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:07,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763664475] [2024-02-20 12:13:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:10,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763664475] [2024-02-20 12:13:10,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763664475] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:10,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756048604] [2024-02-20 12:13:10,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:13:10,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:10,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:10,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:13:10,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:13:11,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-20 12:13:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:13:11,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-20 12:13:11,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:13:12,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:13:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756048604] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:13:12,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-20 12:13:12,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 20 [2024-02-20 12:13:12,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263047827] [2024-02-20 12:13:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:13:12,269 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-20 12:13:12,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-20 12:13:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2024-02-20 12:13:12,521 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-20 12:13:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 678 transitions, 8989 flow. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-20 12:13:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:15,102 INFO L124 PetriNetUnfolderBase]: 6221/10409 cut-off events. [2024-02-20 12:13:15,102 INFO L125 PetriNetUnfolderBase]: For 47294/47492 co-relation queries the response was YES. [2024-02-20 12:13:15,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64283 conditions, 10409 events. 6221/10409 cut-off events. For 47294/47492 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 67065 event pairs, 428 based on Foata normal form. 105/10482 useless extension candidates. Maximal degree in co-relation 30552. Up to 6772 conditions per place. [2024-02-20 12:13:15,270 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 632 selfloop transitions, 29 changer transitions 200/875 dead transitions. [2024-02-20 12:13:15,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 875 transitions, 13296 flow [2024-02-20 12:13:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-20 12:13:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-20 12:13:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-02-20 12:13:15,281 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2024-02-20 12:13:15,282 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-02-20 12:13:15,282 INFO L507 AbstractCegarLoop]: Abstraction has has 119 places, 875 transitions, 13296 flow [2024-02-20 12:13:15,282 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:15,282 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:15,283 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:13:15,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:13:15,495 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-02-20 12:13:15,496 INFO L432 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)] === [2024-02-20 12:13:15,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1536870775, now seen corresponding path program 1 times [2024-02-20 12:13:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386574773] [2024-02-20 12:13:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:15,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:13:15,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:15,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386574773] [2024-02-20 12:13:15,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386574773] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:15,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726806309] [2024-02-20 12:13:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:15,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:15,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:15,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:13:15,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:13:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:15,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:13:15,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:13:16,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:13:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:13:16,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726806309] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:13:16,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:13:16,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-20 12:13:16,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896435936] [2024-02-20 12:13:16,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:13:16,527 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:13:16,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:13:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:13:16,528 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-20 12:13:16,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 875 transitions, 13296 flow. Second operand has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:16,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:16,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-20 12:13:16,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:19,527 INFO L124 PetriNetUnfolderBase]: 6353/10797 cut-off events. [2024-02-20 12:13:19,527 INFO L125 PetriNetUnfolderBase]: For 76936/77416 co-relation queries the response was YES. [2024-02-20 12:13:19,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72784 conditions, 10797 events. 6353/10797 cut-off events. For 76936/77416 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 71578 event pairs, 596 based on Foata normal form. 424/11179 useless extension candidates. Maximal degree in co-relation 20581. Up to 6906 conditions per place. [2024-02-20 12:13:19,658 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 476 selfloop transitions, 12 changer transitions 237/797 dead transitions. [2024-02-20 12:13:19,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 797 transitions, 13834 flow [2024-02-20 12:13:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 12:13:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 12:13:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-02-20 12:13:19,660 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4980237154150198 [2024-02-20 12:13:19,662 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-02-20 12:13:19,663 INFO L507 AbstractCegarLoop]: Abstraction has has 114 places, 797 transitions, 13834 flow [2024-02-20 12:13:19,663 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:19,663 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:19,664 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:13:19,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:13:19,877 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:19,877 INFO L432 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)] === [2024-02-20 12:13:19,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash 4386789, now seen corresponding path program 2 times [2024-02-20 12:13:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434489328] [2024-02-20 12:13:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:13:20,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:20,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434489328] [2024-02-20 12:13:20,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434489328] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:20,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170965143] [2024-02-20 12:13:20,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:13:20,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:20,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:20,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:13:20,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:13:20,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:13:20,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:13:20,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 12:13:20,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:13:23,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:13:25,291 INFO L349 Elim1Store]: treesize reduction 25, result has 83.0 percent of original size [2024-02-20 12:13:25,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 151 [2024-02-20 12:13:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:13:27,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170965143] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:13:27,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:13:27,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 13] total 30 [2024-02-20 12:13:27,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293434352] [2024-02-20 12:13:27,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:13:27,326 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-20 12:13:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-20 12:13:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2024-02-20 12:13:27,749 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-02-20 12:13:27,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 797 transitions, 13834 flow. Second operand has 31 states, 31 states have (on average 12.03225806451613) internal successors, (373), 31 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:27,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:27,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-02-20 12:13:27,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:43,595 INFO L124 PetriNetUnfolderBase]: 13851/22288 cut-off events. [2024-02-20 12:13:43,595 INFO L125 PetriNetUnfolderBase]: For 160204/160380 co-relation queries the response was YES. [2024-02-20 12:13:43,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171245 conditions, 22288 events. 13851/22288 cut-off events. For 160204/160380 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 152959 event pairs, 818 based on Foata normal form. 415/22670 useless extension candidates. Maximal degree in co-relation 59406. Up to 14920 conditions per place. [2024-02-20 12:13:43,961 INFO L140 encePairwiseOnDemand]: 29/46 looper letters, 1127 selfloop transitions, 182 changer transitions 381/1702 dead transitions. [2024-02-20 12:13:43,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1702 transitions, 32337 flow [2024-02-20 12:13:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-02-20 12:13:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-02-20 12:13:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 867 transitions. [2024-02-20 12:13:43,968 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40973534971644615 [2024-02-20 12:13:43,969 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-02-20 12:13:43,969 INFO L507 AbstractCegarLoop]: Abstraction has has 159 places, 1702 transitions, 32337 flow [2024-02-20 12:13:43,969 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 12.03225806451613) internal successors, (373), 31 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:43,970 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:43,970 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:13:43,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:13:44,182 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:44,183 INFO L432 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)] === [2024-02-20 12:13:44,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1587542007, now seen corresponding path program 1 times [2024-02-20 12:13:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:44,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536876990] [2024-02-20 12:13:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:44,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:13:44,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536876990] [2024-02-20 12:13:44,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536876990] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219929698] [2024-02-20 12:13:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:44,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:44,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:13:44,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:13:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:44,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-20 12:13:44,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:13:44,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:13:44,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219929698] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:13:44,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-20 12:13:44,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-02-20 12:13:44,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962363783] [2024-02-20 12:13:44,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:13:44,699 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:13:44,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:44,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:13:44,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-20 12:13:44,700 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-20 12:13:44,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 1702 transitions, 32337 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:44,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:44,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-20 12:13:44,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:52,308 INFO L124 PetriNetUnfolderBase]: 17819/28502 cut-off events. [2024-02-20 12:13:52,309 INFO L125 PetriNetUnfolderBase]: For 296823/297021 co-relation queries the response was YES. [2024-02-20 12:13:52,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234974 conditions, 28502 events. 17819/28502 cut-off events. For 296823/297021 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 198726 event pairs, 1192 based on Foata normal form. 510/28979 useless extension candidates. Maximal degree in co-relation 117148. Up to 20624 conditions per place. [2024-02-20 12:13:52,825 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 862 selfloop transitions, 48 changer transitions 929/1981 dead transitions. [2024-02-20 12:13:52,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1981 transitions, 41630 flow [2024-02-20 12:13:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:13:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:13:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-20 12:13:52,826 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-02-20 12:13:52,827 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 115 predicate places. [2024-02-20 12:13:52,827 INFO L507 AbstractCegarLoop]: Abstraction has has 160 places, 1981 transitions, 41630 flow [2024-02-20 12:13:52,827 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:52,827 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:52,832 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2024-02-20 12:13:52,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 12:13:53,045 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-20 12:13:53,047 INFO L432 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)] === [2024-02-20 12:13:53,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -191684513, now seen corresponding path program 3 times [2024-02-20 12:13:53,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:53,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651389702] [2024-02-20 12:13:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:53,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:13:54,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651389702] [2024-02-20 12:13:54,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651389702] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:54,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159842028] [2024-02-20 12:13:54,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:13:54,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:54,339 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:13:54,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:13:54,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:13:54,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:13:54,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-20 12:13:54,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 12:13:55,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:13:56,185 INFO L349 Elim1Store]: treesize reduction 13, result has 86.0 percent of original size [2024-02-20 12:13:56,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 107 [2024-02-20 12:13:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 12:13:56,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159842028] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:13:56,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:13:56,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 9] total 22 [2024-02-20 12:13:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972098016] [2024-02-20 12:13:56,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:13:56,405 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 12:13:56,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 12:13:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-02-20 12:13:56,596 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-20 12:13:56,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 1981 transitions, 41630 flow. Second operand has 23 states, 23 states have (on average 13.91304347826087) internal successors, (320), 23 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:56,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:56,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-20 12:13:56,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:14:11,391 INFO L124 PetriNetUnfolderBase]: 20448/32976 cut-off events. [2024-02-20 12:14:11,391 INFO L125 PetriNetUnfolderBase]: For 389058/389318 co-relation queries the response was YES. [2024-02-20 12:14:11,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297978 conditions, 32976 events. 20448/32976 cut-off events. For 389058/389318 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 235818 event pairs, 1094 based on Foata normal form. 124/33064 useless extension candidates. Maximal degree in co-relation 158698. Up to 23927 conditions per place. [2024-02-20 12:14:11,710 INFO L140 encePairwiseOnDemand]: 32/46 looper letters, 1386 selfloop transitions, 177 changer transitions 1053/2633 dead transitions. [2024-02-20 12:14:11,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 2633 transitions, 60081 flow [2024-02-20 12:14:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 12:14:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 12:14:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 486 transitions. [2024-02-20 12:14:11,716 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45935727788279773 [2024-02-20 12:14:11,716 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-02-20 12:14:11,717 INFO L507 AbstractCegarLoop]: Abstraction has has 182 places, 2633 transitions, 60081 flow [2024-02-20 12:14:11,718 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.91304347826087) internal successors, (320), 23 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:14:11,718 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:14:11,718 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:14:11,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 12:14:11,932 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:11,933 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:14:11,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:14:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash 400656640, now seen corresponding path program 1 times [2024-02-20 12:14:11,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:14:11,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826904045] [2024-02-20 12:14:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:14:11,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:14:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:14:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 12:14:12,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:14:12,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826904045] [2024-02-20 12:14:12,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826904045] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:14:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142754134] [2024-02-20 12:14:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:14:12,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:12,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:14:12,136 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:14:12,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:14:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:14:12,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:14:12,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:14:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 12:14:12,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:14:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 12:14:12,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142754134] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:14:12,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:14:12,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-20 12:14:12,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228307815] [2024-02-20 12:14:12,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:14:12,552 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:14:12,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:14:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:14:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:14:12,552 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-20 12:14:12,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 2633 transitions, 60081 flow. Second operand has 12 states, 12 states have (on average 19.75) internal successors, (237), 12 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:14:12,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:14:12,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-20 12:14:12,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:14:29,809 INFO L124 PetriNetUnfolderBase]: 27395/44462 cut-off events. [2024-02-20 12:14:29,809 INFO L125 PetriNetUnfolderBase]: For 652278/652586 co-relation queries the response was YES. [2024-02-20 12:14:29,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429272 conditions, 44462 events. 27395/44462 cut-off events. For 652278/652586 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 337316 event pairs, 1051 based on Foata normal form. 526/44950 useless extension candidates. Maximal degree in co-relation 169705. Up to 32793 conditions per place. [2024-02-20 12:14:30,362 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 1317 selfloop transitions, 12 changer transitions 2081/3642 dead transitions. [2024-02-20 12:14:30,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 3642 transitions, 91488 flow [2024-02-20 12:14:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 12:14:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 12:14:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-02-20 12:14:30,364 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5260869565217391 [2024-02-20 12:14:30,364 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-02-20 12:14:30,365 INFO L507 AbstractCegarLoop]: Abstraction has has 191 places, 3642 transitions, 91488 flow [2024-02-20 12:14:30,365 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.75) internal successors, (237), 12 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:14:30,365 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:14:30,366 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:14:30,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 12:14:30,579 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:30,579 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:14:30,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:14:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash 491069583, now seen corresponding path program 2 times [2024-02-20 12:14:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:14:30,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817425701] [2024-02-20 12:14:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:14:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:14:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:14:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:32,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:14:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817425701] [2024-02-20 12:14:32,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817425701] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:14:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219654527] [2024-02-20 12:14:32,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:14:32,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:14:32,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:14:32,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 12:14:32,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:14:32,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:14:32,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:14:32,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:14:33,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:14:33,445 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 35 treesize of output 28 [2024-02-20 12:14:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:14:33,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:14:34,420 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-02-20 12:14:34,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 101 [2024-02-20 12:14:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:14:35,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219654527] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:14:35,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:14:35,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 36 [2024-02-20 12:14:35,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510971900] [2024-02-20 12:14:35,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:14:35,411 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-02-20 12:14:35,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:14:35,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-02-20 12:14:35,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2024-02-20 12:14:35,807 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-20 12:14:35,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 3642 transitions, 91488 flow. Second operand has 37 states, 37 states have (on average 12.567567567567568) internal successors, (465), 37 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:14:35,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:14:35,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-20 12:14:35,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:16:18,666 INFO L124 PetriNetUnfolderBase]: 76237/119749 cut-off events. [2024-02-20 12:16:18,666 INFO L125 PetriNetUnfolderBase]: For 1782687/1783095 co-relation queries the response was YES. [2024-02-20 12:16:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243616 conditions, 119749 events. 76237/119749 cut-off events. For 1782687/1783095 co-relation queries the response was YES. Maximal size of possible extension queue 2937. Compared 979548 event pairs, 3030 based on Foata normal form. 1582/121287 useless extension candidates. Maximal degree in co-relation 373131. Up to 97746 conditions per place. [2024-02-20 12:16:20,583 INFO L140 encePairwiseOnDemand]: 32/46 looper letters, 4247 selfloop transitions, 739 changer transitions 3529/8629 dead transitions. [2024-02-20 12:16:20,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 8629 transitions, 231889 flow [2024-02-20 12:16:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-02-20 12:16:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2024-02-20 12:16:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 2038 transitions. [2024-02-20 12:16:20,587 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49227053140096616 [2024-02-20 12:16:20,588 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-02-20 12:16:20,588 INFO L507 AbstractCegarLoop]: Abstraction has has 280 places, 8629 transitions, 231889 flow [2024-02-20 12:16:20,588 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 12.567567567567568) internal successors, (465), 37 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:16:20,588 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:16:20,589 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:16:20,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-20 12:16:20,801 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-20 12:16:20,801 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:16:20,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:16:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2046079065, now seen corresponding path program 3 times [2024-02-20 12:16:20,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:16:20,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912769818] [2024-02-20 12:16:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:16:20,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:16:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:16:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:16:22,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:16:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912769818] [2024-02-20 12:16:22,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912769818] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:16:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903888075] [2024-02-20 12:16:22,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:16:22,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:16:22,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:16:22,903 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:16:22,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 12:16:23,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:16:23,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:16:23,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 44 conjunts are in the unsatisfiable core [2024-02-20 12:16:23,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:16:25,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:16:25,075 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 22 treesize of output 18 [2024-02-20 12:16:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:16:25,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:16:26,691 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-02-20 12:16:26,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 101 [2024-02-20 12:16:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:16:28,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903888075] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:16:28,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:16:28,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2024-02-20 12:16:28,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72986513] [2024-02-20 12:16:28,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:16:28,308 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-02-20 12:16:28,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:16:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-02-20 12:16:28,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2024-02-20 12:16:28,711 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-20 12:16:28,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 8629 transitions, 231889 flow. Second operand has 41 states, 41 states have (on average 12.24390243902439) internal successors, (502), 41 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:16:28,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:16:28,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-20 12:16:28,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand