./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/queue_ok_longest.i --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/pthread/queue_ok_longest.i -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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --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 11:21:36,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:21:36,601 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:21:36,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:21:36,605 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:21:36,618 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:21:36,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:21:36,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:21:36,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:21:36,621 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:21:36,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:21:36,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:21:36,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:21:36,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:21:36,624 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:21:36,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:21:36,625 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:21:36,627 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:21:36,627 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:21:36,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:21:36,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:21:36,628 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:21:36,628 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:21:36,629 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:21:36,629 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:21:36,629 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:21:36,629 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:21:36,629 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:21:36,630 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:21:36,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:21:36,631 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:21:36,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:21:36,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:21:36,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:21:36,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:21:36,632 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:21:36,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:21:36,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:21:36,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:21:36,632 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:21:36,632 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:21:36,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:21:36,633 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:21:36,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:21:36,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:21:36,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:21:36,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:21:36,841 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:21:36,841 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:21:36,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longest.i [2024-02-20 11:21:37,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:21:38,124 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:21:38,124 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i [2024-02-20 11:21:38,151 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e452e289e/7dd8e0e260b543d2803c9601cd4c5ba7/FLAG634d50bbd [2024-02-20 11:21:38,161 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e452e289e/7dd8e0e260b543d2803c9601cd4c5ba7 [2024-02-20 11:21:38,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:21:38,164 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:21:38,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:21:38,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:21:38,185 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:21:38,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4110177b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38, skipping insertion in model container [2024-02-20 11:21:38,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,224 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:21:38,543 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2024-02-20 11:21:38,554 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2024-02-20 11:21:38,558 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:21:38,575 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:21:38,635 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2024-02-20 11:21:38,637 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2024-02-20 11:21:38,639 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:21:38,696 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:21:38,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38 WrapperNode [2024-02-20 11:21:38,697 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:21:38,698 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:21:38,698 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:21:38,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:21:38,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,734 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,769 INFO L138 Inliner]: procedures = 275, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2024-02-20 11:21:38,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:21:38,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:21:38,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:21:38,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:21:38,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,794 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,810 INFO L175 MemorySlicer]: Split 38 memory accesses to 6 slices as follows [2, 5, 3, 2, 24, 2]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0, 0]. The 15 writes are split as follows [0, 0, 2, 1, 11, 1]. [2024-02-20 11:21:38,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,811 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,817 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,833 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:21:38,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:21:38,837 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:21:38,837 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:21:38,838 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:21:38,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:38,911 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 11:21:38,932 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 11:21:38,950 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-20 11:21:38,950 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-20 11:21:38,950 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-20 11:21:38,951 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-20 11:21:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:21:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:21:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-20 11:21:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 11:21:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 11:21:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 11:21:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 11:21:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-20 11:21:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-02-20 11:21:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:21:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:21:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:21:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 11:21:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 11:21:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-02-20 11:21:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-20 11:21:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:21:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:21:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:21:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:21:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 11:21:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 11:21:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-02-20 11:21:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:21:38,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:21:38,955 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 11:21:39,081 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:21:39,083 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:21:39,310 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:21:39,311 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:21:39,531 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:21:39,531 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 11:21:39,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:21:39 BoogieIcfgContainer [2024-02-20 11:21:39,532 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:21:39,534 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:21:39,534 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:21:39,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:21:39,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:21:38" (1/3) ... [2024-02-20 11:21:39,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b55be8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:21:39, skipping insertion in model container [2024-02-20 11:21:39,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38" (2/3) ... [2024-02-20 11:21:39,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b55be8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:21:39, skipping insertion in model container [2024-02-20 11:21:39,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:21:39" (3/3) ... [2024-02-20 11:21:39,540 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2024-02-20 11:21:39,555 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:21:39,555 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-20 11:21:39,555 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:21:39,617 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 11:21:39,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 41 transitions, 96 flow [2024-02-20 11:21:39,681 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2024-02-20 11:21:39,682 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:21:39,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 7/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2024-02-20 11:21:39,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 41 transitions, 96 flow [2024-02-20 11:21:39,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 37 transitions, 83 flow [2024-02-20 11:21:39,706 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:21:39,713 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;@775a5b2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:21:39,715 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-20 11:21:39,719 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:21:39,719 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-20 11:21:39,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:21:39,719 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:39,720 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-20 11:21:39,724 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 2 more)] === [2024-02-20 11:21:39,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash 541883, now seen corresponding path program 1 times [2024-02-20 11:21:39,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:39,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861730237] [2024-02-20 11:21:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:39,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:39,969 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 11:21:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861730237] [2024-02-20 11:21:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861730237] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:39,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 11:21:39,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496443187] [2024-02-20 11:21:39,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:39,978 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-20 11:21:39,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-20 11:21:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-20 11:21:40,008 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:40,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 83 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 11:21:40,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:40,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:40,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:40,168 INFO L124 PetriNetUnfolderBase]: 303/522 cut-off events. [2024-02-20 11:21:40,169 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-20 11:21:40,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 522 events. 303/522 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2052 event pairs, 209 based on Foata normal form. 16/458 useless extension candidates. Maximal degree in co-relation 914. Up to 485 conditions per place. [2024-02-20 11:21:40,176 INFO L140 encePairwiseOnDemand]: 39/41 looper letters, 26 selfloop transitions, 0 changer transitions 2/33 dead transitions. [2024-02-20 11:21:40,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 131 flow [2024-02-20 11:21:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-20 11:21:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-20 11:21:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 46 transitions. [2024-02-20 11:21:40,188 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-02-20 11:21:40,192 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-02-20 11:21:40,192 INFO L507 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 131 flow [2024-02-20 11:21:40,192 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 11:21:40,193 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:40,193 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:40,193 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:21:40,193 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:40,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2030950034, now seen corresponding path program 1 times [2024-02-20 11:21:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:40,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953627953] [2024-02-20 11:21:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:40,407 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 11:21:40,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:40,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953627953] [2024-02-20 11:21:40,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953627953] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:40,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:40,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 11:21:40,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360834579] [2024-02-20 11:21:40,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:40,410 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:21:40,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:40,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:21:40,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:21:40,413 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:40,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:21:40,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:40,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:40,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:40,501 INFO L124 PetriNetUnfolderBase]: 231/444 cut-off events. [2024-02-20 11:21:40,502 INFO L125 PetriNetUnfolderBase]: For 73/107 co-relation queries the response was YES. [2024-02-20 11:21:40,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309 conditions, 444 events. 231/444 cut-off events. For 73/107 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1813 event pairs, 121 based on Foata normal form. 14/414 useless extension candidates. Maximal degree in co-relation 1074. Up to 413 conditions per place. [2024-02-20 11:21:40,505 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 28 selfloop transitions, 2 changer transitions 9/44 dead transitions. [2024-02-20 11:21:40,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 259 flow [2024-02-20 11:21:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:21:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:21:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-02-20 11:21:40,508 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-02-20 11:21:40,509 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-02-20 11:21:40,509 INFO L507 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 259 flow [2024-02-20 11:21:40,509 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:21:40,510 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:40,510 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:40,512 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:21:40,512 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:40,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2039704393, now seen corresponding path program 1 times [2024-02-20 11:21:40,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:40,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26303891] [2024-02-20 11:21:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:40,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:40,604 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 11:21:40,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:40,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26303891] [2024-02-20 11:21:40,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26303891] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:40,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:40,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:21:40,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300751684] [2024-02-20 11:21:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:40,609 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:21:40,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:21:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:21:40,610 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:40,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 11:21:40,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:40,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:40,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:40,734 INFO L124 PetriNetUnfolderBase]: 246/471 cut-off events. [2024-02-20 11:21:40,734 INFO L125 PetriNetUnfolderBase]: For 110/162 co-relation queries the response was YES. [2024-02-20 11:21:40,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1832 conditions, 471 events. 246/471 cut-off events. For 110/162 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1917 event pairs, 121 based on Foata normal form. 0/429 useless extension candidates. Maximal degree in co-relation 1526. Up to 440 conditions per place. [2024-02-20 11:21:40,736 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 34 selfloop transitions, 2 changer transitions 11/52 dead transitions. [2024-02-20 11:21:40,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 404 flow [2024-02-20 11:21:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:21:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:21:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-20 11:21:40,738 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-02-20 11:21:40,739 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-02-20 11:21:40,739 INFO L507 AbstractCegarLoop]: Abstraction has has 40 places, 52 transitions, 404 flow [2024-02-20 11:21:40,739 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 11:21:40,739 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:40,740 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:40,740 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:21:40,740 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:40,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash -453168286, now seen corresponding path program 1 times [2024-02-20 11:21:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:40,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705253010] [2024-02-20 11:21:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:40,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705253010] [2024-02-20 11:21:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705253010] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:40,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:40,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:21:40,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631327523] [2024-02-20 11:21:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:40,881 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:21:40,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:21:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:21:40,882 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:40,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 52 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 11:21:40,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:40,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:40,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:40,956 INFO L124 PetriNetUnfolderBase]: 189/412 cut-off events. [2024-02-20 11:21:40,956 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2024-02-20 11:21:40,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 412 events. 189/412 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1661 event pairs, 45 based on Foata normal form. 10/394 useless extension candidates. Maximal degree in co-relation 1508. Up to 355 conditions per place. [2024-02-20 11:21:40,959 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 42 selfloop transitions, 3 changer transitions 17/67 dead transitions. [2024-02-20 11:21:40,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 660 flow [2024-02-20 11:21:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:21:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:21:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-02-20 11:21:40,962 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-02-20 11:21:40,964 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2024-02-20 11:21:40,964 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 67 transitions, 660 flow [2024-02-20 11:21:40,964 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 11:21:40,964 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:40,964 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] [2024-02-20 11:21:40,965 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:21:40,965 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:40,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash 395729065, now seen corresponding path program 1 times [2024-02-20 11:21:40,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:40,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634279990] [2024-02-20 11:21:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:40,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:41,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634279990] [2024-02-20 11:21:41,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634279990] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:41,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684363105] [2024-02-20 11:21:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:41,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:41,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:41,029 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 11:21:41,066 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 11:21:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:41,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-20 11:21:41,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684363105] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:41,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:41,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-20 11:21:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872613412] [2024-02-20 11:21:41,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:41,257 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-20 11:21:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-20 11:21:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-20 11:21:41,258 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:41,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 67 transitions, 660 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 11:21:41,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:41,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:41,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:41,377 INFO L124 PetriNetUnfolderBase]: 219/472 cut-off events. [2024-02-20 11:21:41,377 INFO L125 PetriNetUnfolderBase]: For 462/462 co-relation queries the response was YES. [2024-02-20 11:21:41,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 472 events. 219/472 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1860 event pairs, 45 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 2162. Up to 415 conditions per place. [2024-02-20 11:21:41,380 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 55 selfloop transitions, 5 changer transitions 20/85 dead transitions. [2024-02-20 11:21:41,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 85 transitions, 1009 flow [2024-02-20 11:21:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:21:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:21:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-02-20 11:21:41,382 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-02-20 11:21:41,382 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2024-02-20 11:21:41,382 INFO L507 AbstractCegarLoop]: Abstraction has has 47 places, 85 transitions, 1009 flow [2024-02-20 11:21:41,382 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 11:21:41,383 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:41,383 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:41,397 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 11:21:41,594 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:41,595 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:41,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash -977352800, now seen corresponding path program 2 times [2024-02-20 11:21:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:41,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129616385] [2024-02-20 11:21:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:41,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129616385] [2024-02-20 11:21:41,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129616385] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:41,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347101624] [2024-02-20 11:21:41,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:21:41,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:41,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:41,712 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 11:21:41,736 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 11:21:41,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:21:41,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:41,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 11:21:41,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347101624] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:41,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:41,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-20 11:21:41,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771650551] [2024-02-20 11:21:41,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:41,929 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 11:21:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 11:21:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-20 11:21:41,930 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:41,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 85 transitions, 1009 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:21:41,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:41,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:41,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:42,105 INFO L124 PetriNetUnfolderBase]: 279/592 cut-off events. [2024-02-20 11:21:42,105 INFO L125 PetriNetUnfolderBase]: For 678/678 co-relation queries the response was YES. [2024-02-20 11:21:42,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 592 events. 279/592 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2272 event pairs, 45 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 3362. Up to 535 conditions per place. [2024-02-20 11:21:42,109 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 79 selfloop transitions, 11 changer transitions 26/121 dead transitions. [2024-02-20 11:21:42,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 121 transitions, 1691 flow [2024-02-20 11:21:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:21:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:21:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-02-20 11:21:42,110 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-02-20 11:21:42,111 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-02-20 11:21:42,111 INFO L507 AbstractCegarLoop]: Abstraction has has 58 places, 121 transitions, 1691 flow [2024-02-20 11:21:42,111 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:21:42,111 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:42,112 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:42,125 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 11:21:42,323 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,SelfDestructingSolverStorable5 [2024-02-20 11:21:42,324 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:42,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash 550042368, now seen corresponding path program 3 times [2024-02-20 11:21:42,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:42,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838007159] [2024-02-20 11:21:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:42,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:42,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838007159] [2024-02-20 11:21:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838007159] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:42,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415925070] [2024-02-20 11:21:42,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:21:42,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:42,567 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 11:21:42,594 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 11:21:45,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-02-20 11:21:45,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:45,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-20 11:21:45,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:45,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:45,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415925070] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:45,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:45,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-02-20 11:21:45,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824320347] [2024-02-20 11:21:45,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:45,707 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 11:21:45,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:45,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 11:21:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-02-20 11:21:45,708 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:45,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 121 transitions, 1691 flow. Second operand has 25 states, 25 states have (on average 9.64) internal successors, (241), 25 states have internal predecessors, (241), 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 11:21:45,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:45,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:45,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:46,010 INFO L124 PetriNetUnfolderBase]: 399/832 cut-off events. [2024-02-20 11:21:46,010 INFO L125 PetriNetUnfolderBase]: For 943/943 co-relation queries the response was YES. [2024-02-20 11:21:46,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6339 conditions, 832 events. 399/832 cut-off events. For 943/943 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3106 event pairs, 45 based on Foata normal form. 0/804 useless extension candidates. Maximal degree in co-relation 5774. Up to 775 conditions per place. [2024-02-20 11:21:46,015 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 127 selfloop transitions, 23 changer transitions 38/193 dead transitions. [2024-02-20 11:21:46,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 193 transitions, 3111 flow [2024-02-20 11:21:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-20 11:21:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-20 11:21:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 364 transitions. [2024-02-20 11:21:46,017 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-02-20 11:21:46,017 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2024-02-20 11:21:46,017 INFO L507 AbstractCegarLoop]: Abstraction has has 81 places, 193 transitions, 3111 flow [2024-02-20 11:21:46,018 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.64) internal successors, (241), 25 states have internal predecessors, (241), 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 11:21:46,018 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:46,018 INFO L234 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:46,046 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 11:21:46,246 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:46,246 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:46,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1997747638, now seen corresponding path program 4 times [2024-02-20 11:21:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020637794] [2024-02-20 11:21:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:47,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:47,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020637794] [2024-02-20 11:21:47,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020637794] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:47,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387873100] [2024-02-20 11:21:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:21:47,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:47,017 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 11:21:47,018 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 11:21:47,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:21:47,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:47,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-20 11:21:47,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:47,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:47,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387873100] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:47,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:47,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-02-20 11:21:47,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889739842] [2024-02-20 11:21:47,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:47,908 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-02-20 11:21:47,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-02-20 11:21:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-02-20 11:21:47,910 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:47,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 193 transitions, 3111 flow. Second operand has 49 states, 49 states have (on average 9.326530612244898) internal successors, (457), 49 states have internal predecessors, (457), 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 11:21:47,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:47,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:47,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:48,607 INFO L124 PetriNetUnfolderBase]: 639/1312 cut-off events. [2024-02-20 11:21:48,608 INFO L125 PetriNetUnfolderBase]: For 1261/1261 co-relation queries the response was YES. [2024-02-20 11:21:48,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11482 conditions, 1312 events. 639/1312 cut-off events. For 1261/1261 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4755 event pairs, 45 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 10850. Up to 1255 conditions per place. [2024-02-20 11:21:48,616 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 223 selfloop transitions, 47 changer transitions 62/337 dead transitions. [2024-02-20 11:21:48,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 337 transitions, 6151 flow [2024-02-20 11:21:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-20 11:21:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-20 11:21:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 712 transitions. [2024-02-20 11:21:48,620 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3617886178861789 [2024-02-20 11:21:48,623 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 91 predicate places. [2024-02-20 11:21:48,623 INFO L507 AbstractCegarLoop]: Abstraction has has 128 places, 337 transitions, 6151 flow [2024-02-20 11:21:48,624 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 9.326530612244898) internal successors, (457), 49 states have internal predecessors, (457), 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 11:21:48,624 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:48,624 INFO L234 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:48,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-20 11:21:48,836 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:48,837 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:48,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash 666012106, now seen corresponding path program 5 times [2024-02-20 11:21:48,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:48,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683527762] [2024-02-20 11:21:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:48,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:51,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:51,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683527762] [2024-02-20 11:21:51,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683527762] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:51,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738796185] [2024-02-20 11:21:51,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:21:51,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:51,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:51,027 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 11:21:51,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15