./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.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/stack_longest-2.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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --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 11:21:56,599 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:21:56,637 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:21:56,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:21:56,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:21:56,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:21:56,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:21:56,669 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:21:56,669 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:21:56,669 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:21:56,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:21:56,670 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:21:56,671 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:21:56,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:21:56,674 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:21:56,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:21:56,675 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:21:56,676 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:21:56,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:21:56,676 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:21:56,676 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:21:56,677 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:21:56,677 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:21:56,677 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:21:56,677 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:21:56,678 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:21:56,678 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:21:56,678 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:21:56,678 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:21:56,679 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:21:56,679 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:21:56,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:21:56,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:21:56,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:21:56,680 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:21:56,680 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:21:56,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:21:56,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:21:56,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:21:56,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:21:56,681 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:21:56,682 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:21:56,682 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:21:56,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:21:56,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:21:56,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:21:56,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:21:56,943 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:21:56,943 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:21:56,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-02-20 11:21:58,012 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:21:58,213 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:21:58,213 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-02-20 11:21:58,227 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6146aef6/d3d1fe55938a464d8cfdaf8145ab3ad8/FLAG92afc0196 [2024-02-20 11:21:58,237 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6146aef6/d3d1fe55938a464d8cfdaf8145ab3ad8 [2024-02-20 11:21:58,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:21:58,240 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:21:58,241 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:21:58,241 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:21:58,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:21:58,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b8b072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58, skipping insertion in model container [2024-02-20 11:21:58,247 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,289 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:21:58,590 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/stack_longest-2.i[41530,41543] [2024-02-20 11:21:58,627 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:21:58,644 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:21:58,684 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/stack_longest-2.i[41530,41543] [2024-02-20 11:21:58,705 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:21:58,754 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:21:58,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58 WrapperNode [2024-02-20 11:21:58,755 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:21:58,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:21:58,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:21:58,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:21:58,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,782 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,807 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2024-02-20 11:21:58,808 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:21:58,808 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:21:58,808 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:21:58,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:21:58,817 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,820 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,839 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 3, 2, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 5, 0]. The 4 writes are split as follows [0, 2, 1, 0, 1]. [2024-02-20 11:21:58,840 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,840 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,848 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,853 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,854 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:21:58,857 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:21:58,857 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:21:58,857 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:21:58,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (1/1) ... [2024-02-20 11:21:58,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:21:58,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:58,900 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 11:21:58,907 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 11:21:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-20 11:21:58,942 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-20 11:21:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-20 11:21:58,943 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-20 11:21:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:21:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:21:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-20 11:21:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 11:21:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 11:21:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 11:21:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 11:21:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-20 11:21:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:21:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:21:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:21:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 11:21:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 11:21:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-20 11:21:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:21:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:21:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:21:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:21:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 11:21:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 11:21:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:21:58,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:21:58,950 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 11:21:59,121 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:21:59,124 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:21:59,399 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:21:59,399 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:21:59,579 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:21:59,580 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 11:21:59,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:21:59 BoogieIcfgContainer [2024-02-20 11:21:59,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:21:59,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:21:59,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:21:59,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:21:59,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:21:58" (1/3) ... [2024-02-20 11:21:59,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0588cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:21:59, skipping insertion in model container [2024-02-20 11:21:59,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:58" (2/3) ... [2024-02-20 11:21:59,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0588cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:21:59, skipping insertion in model container [2024-02-20 11:21:59,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:21:59" (3/3) ... [2024-02-20 11:21:59,588 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-02-20 11:21:59,603 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:21:59,604 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-20 11:21:59,604 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:21:59,652 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 11:21:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2024-02-20 11:21:59,703 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2024-02-20 11:21:59,704 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:21:59,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-02-20 11:21:59,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2024-02-20 11:21:59,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2024-02-20 11:21:59,715 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:21:59,720 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;@66f8b022, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:21:59,721 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-20 11:21:59,726 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:21:59,727 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-02-20 11:21:59,727 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-20 11:21:59,727 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:59,728 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:59,728 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:21:59,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash -28897917, now seen corresponding path program 1 times [2024-02-20 11:21:59,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:59,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898788271] [2024-02-20 11:21:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:59,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:00,117 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 11:22:00,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:00,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898788271] [2024-02-20 11:22:00,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898788271] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:22:00,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:22:00,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:22:00,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164185111] [2024-02-20 11:22:00,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:22:00,129 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:22:00,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:22:00,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 11:22:00,163 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-20 11:22:00,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 11:22:00,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:00,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-20 11:22:00,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:00,381 INFO L124 PetriNetUnfolderBase]: 321/604 cut-off events. [2024-02-20 11:22:00,381 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-02-20 11:22:00,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 604 events. 321/604 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2745 event pairs, 57 based on Foata normal form. 45/610 useless extension candidates. Maximal degree in co-relation 1056. Up to 375 conditions per place. [2024-02-20 11:22:00,390 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 42 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2024-02-20 11:22:00,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 222 flow [2024-02-20 11:22:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 11:22:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 11:22:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-02-20 11:22:00,403 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-02-20 11:22:00,406 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2024-02-20 11:22:00,406 INFO L507 AbstractCegarLoop]: Abstraction has has 36 places, 54 transitions, 222 flow [2024-02-20 11:22:00,406 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 11:22:00,407 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:00,407 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:00,407 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:22:00,407 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:00,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash 994745822, now seen corresponding path program 1 times [2024-02-20 11:22:00,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:00,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211662686] [2024-02-20 11:22:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:00,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:00,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211662686] [2024-02-20 11:22:00,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211662686] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:22:00,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686769403] [2024-02-20 11:22:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:00,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:00,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:22:00,570 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 11:22:00,587 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 11:22:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:00,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-20 11:22:00,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:22:00,775 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 8 treesize of output 1 [2024-02-20 11:22:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:00,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:22:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:00,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686769403] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:22:00,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:22:00,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-20 11:22:00,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460489674] [2024-02-20 11:22:00,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:22:00,897 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:22:00,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:22:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-20 11:22:00,899 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 11:22:00,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 54 transitions, 222 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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 11:22:00,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:00,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 11:22:00,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:01,324 INFO L124 PetriNetUnfolderBase]: 1316/2461 cut-off events. [2024-02-20 11:22:01,324 INFO L125 PetriNetUnfolderBase]: For 407/411 co-relation queries the response was YES. [2024-02-20 11:22:01,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6879 conditions, 2461 events. 1316/2461 cut-off events. For 407/411 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 13298 event pairs, 93 based on Foata normal form. 52/2407 useless extension candidates. Maximal degree in co-relation 6123. Up to 1884 conditions per place. [2024-02-20 11:22:01,336 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 191 selfloop transitions, 33 changer transitions 9/238 dead transitions. [2024-02-20 11:22:01,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 238 transitions, 1434 flow [2024-02-20 11:22:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 11:22:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 11:22:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2024-02-20 11:22:01,339 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-02-20 11:22:01,340 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2024-02-20 11:22:01,340 INFO L507 AbstractCegarLoop]: Abstraction has has 50 places, 238 transitions, 1434 flow [2024-02-20 11:22:01,340 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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 11:22:01,340 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:01,340 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:01,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-20 11:22:01,552 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:01,552 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:01,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash 134985196, now seen corresponding path program 1 times [2024-02-20 11:22:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:01,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317079201] [2024-02-20 11:22:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:01,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:01,647 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 11:22:01,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317079201] [2024-02-20 11:22:01,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317079201] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:22:01,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:22:01,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:22:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262381617] [2024-02-20 11:22:01,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:22:01,653 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:22:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:22:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:22:01,655 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-20 11:22:01,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 238 transitions, 1434 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 11:22:01,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:01,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-20 11:22:01,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:01,835 INFO L124 PetriNetUnfolderBase]: 743/1477 cut-off events. [2024-02-20 11:22:01,835 INFO L125 PetriNetUnfolderBase]: For 591/607 co-relation queries the response was YES. [2024-02-20 11:22:01,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5411 conditions, 1477 events. 743/1477 cut-off events. For 591/607 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7357 event pairs, 33 based on Foata normal form. 72/1519 useless extension candidates. Maximal degree in co-relation 4725. Up to 1103 conditions per place. [2024-02-20 11:22:01,843 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 173 selfloop transitions, 25 changer transitions 21/231 dead transitions. [2024-02-20 11:22:01,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 231 transitions, 1883 flow [2024-02-20 11:22:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:22:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:22:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-02-20 11:22:01,845 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-20 11:22:01,845 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2024-02-20 11:22:01,845 INFO L507 AbstractCegarLoop]: Abstraction has has 49 places, 231 transitions, 1883 flow [2024-02-20 11:22:01,846 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 11:22:01,846 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:01,846 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:01,846 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:22:01,846 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:01,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1477914163, now seen corresponding path program 1 times [2024-02-20 11:22:01,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:01,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375387466] [2024-02-20 11:22:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:01,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:02,116 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 11:22:02,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:02,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375387466] [2024-02-20 11:22:02,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375387466] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:22:02,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:22:02,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:22:02,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613119722] [2024-02-20 11:22:02,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:22:02,118 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:22:02,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:22:02,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:22:02,123 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-20 11:22:02,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 231 transitions, 1883 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 11:22:02,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:02,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-20 11:22:02,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:02,381 INFO L124 PetriNetUnfolderBase]: 932/1856 cut-off events. [2024-02-20 11:22:02,381 INFO L125 PetriNetUnfolderBase]: For 1332/1356 co-relation queries the response was YES. [2024-02-20 11:22:02,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8318 conditions, 1856 events. 932/1856 cut-off events. For 1332/1356 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9608 event pairs, 33 based on Foata normal form. 0/1826 useless extension candidates. Maximal degree in co-relation 7481. Up to 1412 conditions per place. [2024-02-20 11:22:02,392 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 231 selfloop transitions, 7 changer transitions 42/292 dead transitions. [2024-02-20 11:22:02,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 292 transitions, 2952 flow [2024-02-20 11:22:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 11:22:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 11:22:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-02-20 11:22:02,395 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-20 11:22:02,396 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2024-02-20 11:22:02,397 INFO L507 AbstractCegarLoop]: Abstraction has has 53 places, 292 transitions, 2952 flow [2024-02-20 11:22:02,397 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 11:22:02,397 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:02,397 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:02,397 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:22:02,397 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:02,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:02,398 INFO L85 PathProgramCache]: Analyzing trace with hash -802209178, now seen corresponding path program 1 times [2024-02-20 11:22:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:02,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242916262] [2024-02-20 11:22:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:02,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:02,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:02,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242916262] [2024-02-20 11:22:02,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242916262] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:22:02,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611657949] [2024-02-20 11:22:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:02,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:02,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:22:02,732 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 11:22:02,734 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 11:22:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:02,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-20 11:22:02,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:22:02,859 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 8 treesize of output 1 [2024-02-20 11:22:02,907 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 25 treesize of output 1 [2024-02-20 11:22:02,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-02-20 11:22:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:03,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:22:03,201 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 9 treesize of output 1 [2024-02-20 11:22:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:03,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611657949] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:22:03,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:22:03,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-02-20 11:22:03,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109989770] [2024-02-20 11:22:03,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:22:03,238 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 11:22:03,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 11:22:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-02-20 11:22:03,242 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 11:22:03,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 292 transitions, 2952 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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 11:22:03,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:03,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 11:22:03,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:04,069 INFO L124 PetriNetUnfolderBase]: 1870/3733 cut-off events. [2024-02-20 11:22:04,069 INFO L125 PetriNetUnfolderBase]: For 4255/4263 co-relation queries the response was YES. [2024-02-20 11:22:04,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19827 conditions, 3733 events. 1870/3733 cut-off events. For 4255/4263 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 21625 event pairs, 33 based on Foata normal form. 8/3684 useless extension candidates. Maximal degree in co-relation 18704. Up to 2952 conditions per place. [2024-02-20 11:22:04,096 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 434 selfloop transitions, 50 changer transitions 102/591 dead transitions. [2024-02-20 11:22:04,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 591 transitions, 7126 flow [2024-02-20 11:22:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:22:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:22:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 381 transitions. [2024-02-20 11:22:04,103 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5729323308270676 [2024-02-20 11:22:04,104 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2024-02-20 11:22:04,104 INFO L507 AbstractCegarLoop]: Abstraction has has 71 places, 591 transitions, 7126 flow [2024-02-20 11:22:04,105 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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 11:22:04,105 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:04,105 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:04,119 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 11:22:04,316 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:04,316 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:04,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash 730146399, now seen corresponding path program 1 times [2024-02-20 11:22:04,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:04,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562917492] [2024-02-20 11:22:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:04,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 11:22:04,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:04,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562917492] [2024-02-20 11:22:04,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562917492] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:22:04,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976800813] [2024-02-20 11:22:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:04,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:04,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:22:04,487 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 11:22:04,489 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 11:22:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:04,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 11:22:04,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:22:04,612 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 8 treesize of output 1 [2024-02-20 11:22:04,659 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 8 treesize of output 1 [2024-02-20 11:22:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:04,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:22:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 11:22:04,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976800813] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:22:04,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:22:04,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2024-02-20 11:22:04,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086462946] [2024-02-20 11:22:04,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:22:04,846 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 11:22:04,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:04,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 11:22:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-02-20 11:22:04,850 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 11:22:04,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 591 transitions, 7126 flow. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 states have internal predecessors, (165), 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 11:22:04,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:04,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 11:22:04,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:06,051 INFO L124 PetriNetUnfolderBase]: 3074/6127 cut-off events. [2024-02-20 11:22:06,052 INFO L125 PetriNetUnfolderBase]: For 10440/10450 co-relation queries the response was YES. [2024-02-20 11:22:06,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37823 conditions, 6127 events. 3074/6127 cut-off events. For 10440/10450 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 37875 event pairs, 45 based on Foata normal form. 16/6078 useless extension candidates. Maximal degree in co-relation 36527. Up to 4916 conditions per place. [2024-02-20 11:22:06,111 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 736 selfloop transitions, 98 changer transitions 156/995 dead transitions. [2024-02-20 11:22:06,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 995 transitions, 13957 flow [2024-02-20 11:22:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:22:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:22:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 365 transitions. [2024-02-20 11:22:06,113 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5488721804511278 [2024-02-20 11:22:06,115 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2024-02-20 11:22:06,116 INFO L507 AbstractCegarLoop]: Abstraction has has 89 places, 995 transitions, 13957 flow [2024-02-20 11:22:06,116 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 states have internal predecessors, (165), 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 11:22:06,116 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:06,116 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:06,127 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 11:22:06,327 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:06,328 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:06,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:06,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1310963925, now seen corresponding path program 1 times [2024-02-20 11:22:06,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:06,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856254568] [2024-02-20 11:22:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:06,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:06,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:06,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856254568] [2024-02-20 11:22:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856254568] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:22:06,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600376119] [2024-02-20 11:22:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:06,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:22:06,833 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 11:22:06,857 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 11:22:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:06,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-20 11:22:06,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:22:06,973 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 11:22:07,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 19 [2024-02-20 11:22:07,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-02-20 11:22:07,202 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 11:22:07,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:22:07,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:22:07,594 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 1 case distinctions, treesize of input 16 treesize of output 12 [2024-02-20 11:22:07,617 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-02-20 11:22:07,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 66 [2024-02-20 11:22:07,669 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 11:22:07,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600376119] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:22:07,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:22:07,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-02-20 11:22:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225067538] [2024-02-20 11:22:07,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:22:07,670 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 11:22:07,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:07,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 11:22:07,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-02-20 11:22:07,673 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 11:22:07,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 995 transitions, 13957 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 11:22:07,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:07,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 11:22:07,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:09,794 INFO L124 PetriNetUnfolderBase]: 3742/7422 cut-off events. [2024-02-20 11:22:09,795 INFO L125 PetriNetUnfolderBase]: For 17434/17482 co-relation queries the response was YES. [2024-02-20 11:22:09,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52502 conditions, 7422 events. 3742/7422 cut-off events. For 17434/17482 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46966 event pairs, 39 based on Foata normal form. 0/7374 useless extension candidates. Maximal degree in co-relation 51034. Up to 6004 conditions per place. [2024-02-20 11:22:09,844 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 868 selfloop transitions, 107 changer transitions 270/1250 dead transitions. [2024-02-20 11:22:09,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 1250 transitions, 20041 flow [2024-02-20 11:22:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-20 11:22:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-20 11:22:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 452 transitions. [2024-02-20 11:22:09,847 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-02-20 11:22:09,847 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 79 predicate places. [2024-02-20 11:22:09,848 INFO L507 AbstractCegarLoop]: Abstraction has has 112 places, 1250 transitions, 20041 flow [2024-02-20 11:22:09,848 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 11:22:09,848 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:09,849 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-02-20 11:22:09,870 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 11:22:10,060 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:10,060 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:10,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 449342831, now seen corresponding path program 2 times [2024-02-20 11:22:10,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:10,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948236895] [2024-02-20 11:22:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:10,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:10,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:10,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948236895] [2024-02-20 11:22:10,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948236895] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:22:10,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410181251] [2024-02-20 11:22:10,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:22:10,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:10,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:22:10,322 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 11:22:10,349 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 11:22:10,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:22:10,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:22:10,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-20 11:22:10,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:22:10,463 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 8 treesize of output 1 [2024-02-20 11:22:10,499 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 8 treesize of output 1 [2024-02-20 11:22:10,538 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 8 treesize of output 1 [2024-02-20 11:22:10,570 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 8 treesize of output 1 [2024-02-20 11:22:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:10,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:22:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:10,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410181251] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:22:10,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:22:10,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-02-20 11:22:10,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083036086] [2024-02-20 11:22:10,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:22:10,829 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:22:10,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:10,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:22:10,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:22:10,835 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 11:22:10,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 1250 transitions, 20041 flow. Second operand has 21 states, 21 states have (on average 10.714285714285714) internal successors, (225), 21 states have internal predecessors, (225), 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 11:22:10,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:10,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 11:22:10,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:14,443 INFO L124 PetriNetUnfolderBase]: 7205/14177 cut-off events. [2024-02-20 11:22:14,443 INFO L125 PetriNetUnfolderBase]: For 45206/45262 co-relation queries the response was YES. [2024-02-20 11:22:14,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113183 conditions, 14177 events. 7205/14177 cut-off events. For 45206/45262 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 99162 event pairs, 63 based on Foata normal form. 0/14073 useless extension candidates. Maximal degree in co-relation 110354. Up to 11667 conditions per place. [2024-02-20 11:22:14,552 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 1783 selfloop transitions, 257 changer transitions 369/2414 dead transitions. [2024-02-20 11:22:14,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 2414 transitions, 43576 flow [2024-02-20 11:22:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-02-20 11:22:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-02-20 11:22:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 728 transitions. [2024-02-20 11:22:14,557 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-02-20 11:22:14,559 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 118 predicate places. [2024-02-20 11:22:14,559 INFO L507 AbstractCegarLoop]: Abstraction has has 151 places, 2414 transitions, 43576 flow [2024-02-20 11:22:14,559 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.714285714285714) internal successors, (225), 21 states have internal predecessors, (225), 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 11:22:14,559 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:14,559 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:14,571 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 11:22:14,770 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:14,771 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:14,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash 238809353, now seen corresponding path program 2 times [2024-02-20 11:22:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:14,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638509225] [2024-02-20 11:22:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:17,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:17,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638509225] [2024-02-20 11:22:17,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638509225] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:22:17,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518299245] [2024-02-20 11:22:17,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:22:17,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:22:17,107 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 11:22:17,107 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 11:22:17,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:22:17,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:22:17,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:22:17,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:22:17,277 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 15 treesize of output 1 [2024-02-20 11:22:17,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2024-02-20 11:22:17,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2024-02-20 11:22:17,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-02-20 11:22:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:17,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:22:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:18,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518299245] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:22:18,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:22:18,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-02-20 11:22:18,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841656931] [2024-02-20 11:22:18,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:22:18,265 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 11:22:18,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:18,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 11:22:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2024-02-20 11:22:18,270 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 11:22:18,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 2414 transitions, 43576 flow. Second operand has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 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 11:22:18,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:18,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 11:22:18,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:36,424 INFO L124 PetriNetUnfolderBase]: 17454/34361 cut-off events. [2024-02-20 11:22:36,424 INFO L125 PetriNetUnfolderBase]: For 146320/146336 co-relation queries the response was YES. [2024-02-20 11:22:36,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306539 conditions, 34361 events. 17454/34361 cut-off events. For 146320/146336 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 261006 event pairs, 87 based on Foata normal form. 384/34492 useless extension candidates. Maximal degree in co-relation 303412. Up to 28946 conditions per place. [2024-02-20 11:22:36,715 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 4555 selfloop transitions, 626 changer transitions 903/6089 dead transitions. [2024-02-20 11:22:36,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 6089 transitions, 122410 flow [2024-02-20 11:22:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-20 11:22:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-20 11:22:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 846 transitions. [2024-02-20 11:22:36,719 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-02-20 11:22:36,719 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 165 predicate places. [2024-02-20 11:22:36,721 INFO L507 AbstractCegarLoop]: Abstraction has has 198 places, 6089 transitions, 122410 flow [2024-02-20 11:22:36,721 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 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 11:22:36,721 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:36,722 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:36,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-20 11:22:36,933 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:36,933 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:22:36,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:36,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2053985025, now seen corresponding path program 3 times [2024-02-20 11:22:36,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:36,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137757415] [2024-02-20 11:22:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:36,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:37,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:37,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137757415] [2024-02-20 11:22:37,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137757415] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:22:37,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065433267] [2024-02-20 11:22:37,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:22:37,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:37,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:22:37,945 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 11:22:37,946 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 11:22:38,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 11:22:38,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:22:38,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:22:38,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:22:38,179 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 11:22:38,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 48 treesize of output 19 [2024-02-20 11:22:38,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 48 treesize of output 19 [2024-02-20 11:22:38,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 19 [2024-02-20 11:22:38,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-02-20 11:22:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:38,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:22:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:39,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065433267] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:22:39,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:22:39,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2024-02-20 11:22:39,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932408276] [2024-02-20 11:22:39,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:22:39,653 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-20 11:22:39,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-20 11:22:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2024-02-20 11:22:39,658 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 11:22:39,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 6089 transitions, 122410 flow. Second operand has 30 states, 30 states have (on average 11.3) internal successors, (339), 30 states have internal predecessors, (339), 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 11:22:39,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:39,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 11:22:39,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:24:47,427 INFO L124 PetriNetUnfolderBase]: 54501/106381 cut-off events. [2024-02-20 11:24:47,428 INFO L125 PetriNetUnfolderBase]: For 569459/569531 co-relation queries the response was YES. [2024-02-20 11:24:47,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043699 conditions, 106381 events. 54501/106381 cut-off events. For 569459/569531 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 960158 event pairs, 99 based on Foata normal form. 32/105869 useless extension candidates. Maximal degree in co-relation 1040276. Up to 89451 conditions per place. [2024-02-20 11:24:48,507 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 13495 selfloop transitions, 2335 changer transitions 3369/19204 dead transitions. [2024-02-20 11:24:48,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 19204 transitions, 424149 flow [2024-02-20 11:24:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-02-20 11:24:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2024-02-20 11:24:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 2413 transitions. [2024-02-20 11:24:48,512 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5106878306878306 [2024-02-20 11:24:48,513 INFO L308 CegarLoopForPetriNet]: 33 programPoint places, 299 predicate places. [2024-02-20 11:24:48,513 INFO L507 AbstractCegarLoop]: Abstraction has has 332 places, 19204 transitions, 424149 flow [2024-02-20 11:24:48,513 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.3) internal successors, (339), 30 states have internal predecessors, (339), 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 11:24:48,513 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:24:48,513 INFO L234 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:24:48,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-20 11:24:48,714 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:24:48,714 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-20 11:24:48,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:24:48,714 INFO L85 PathProgramCache]: Analyzing trace with hash 423580929, now seen corresponding path program 2 times [2024-02-20 11:24:48,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:24:48,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604445302] [2024-02-20 11:24:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:24:48,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:24:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:24:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:24:49,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:24:49,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604445302] [2024-02-20 11:24:49,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604445302] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:24:49,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367585329] [2024-02-20 11:24:49,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:24:49,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:24:49,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:24:49,330 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 11:24:49,331 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 11:24:49,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:24:49,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:24:49,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-20 11:24:49,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:24:49,545 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 8 treesize of output 1 [2024-02-20 11:24:49,563 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 8 treesize of output 1 [2024-02-20 11:24:49,581 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 8 treesize of output 1 [2024-02-20 11:24:49,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 treesize of output 19 [2024-02-20 11:24:49,692 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 8 treesize of output 1 [2024-02-20 11:24:49,716 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 8 treesize of output 1 [2024-02-20 11:24:49,748 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 8 treesize of output 1 [2024-02-20 11:24:49,779 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 8 treesize of output 1 [2024-02-20 11:24:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 11:24:49,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:24:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:24:50,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367585329] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:24:50,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:24:50,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 32 [2024-02-20 11:24:50,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374764325] [2024-02-20 11:24:50,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:24:50,205 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 11:24:50,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:24:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 11:24:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 11:24:50,208 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 11:24:50,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 19204 transitions, 424149 flow. Second operand has 33 states, 33 states have (on average 11.212121212121213) internal successors, (370), 33 states have internal predecessors, (370), 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 11:24:50,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:24:50,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 11:24:50,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15