./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:35:29,804 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:35:29,878 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:35:29,885 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:35:29,885 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:35:29,911 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:35:29,912 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:35:29,912 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:35:29,913 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:35:29,916 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:35:29,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:35:29,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:35:29,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:35:29,918 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:35:29,918 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:35:29,919 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:35:29,919 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:35:29,919 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:35:29,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:35:29,920 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:35:29,920 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:35:29,920 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:35:29,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:35:29,921 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:35:29,921 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:35:29,931 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:35:29,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:35:29,932 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:35:29,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:35:29,932 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:35:29,933 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:35:29,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:35:29,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:35:29,934 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:35:29,934 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:35:29,934 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:35:29,934 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:35:29,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:35:29,935 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:35:29,935 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:35:29,935 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:35:29,936 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:35:29,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:35:29,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:35:30,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:35:30,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:35:30,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:35:30,196 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:35:30,196 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:35:30,197 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2024-02-20 12:35:31,388 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:35:31,639 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:35:31,640 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2024-02-20 12:35:31,647 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b344cbf39/996bc96cdf534d13862966bae52fdf32/FLAG0d79fa521 [2024-02-20 12:35:31,660 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b344cbf39/996bc96cdf534d13862966bae52fdf32 [2024-02-20 12:35:31,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:35:31,663 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:35:31,666 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:35:31,666 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:35:31,670 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:35:31,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:31,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bab0026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31, skipping insertion in model container [2024-02-20 12:35:31,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:31,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:35:31,873 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2024-02-20 12:35:31,887 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:35:31,896 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:35:31,930 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2024-02-20 12:35:31,937 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:35:31,950 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:35:31,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31 WrapperNode [2024-02-20 12:35:31,951 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:35:31,952 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:35:31,952 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:35:31,952 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:35:31,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:31,971 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:31,998 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 171 [2024-02-20 12:35:31,998 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:35:31,999 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:35:31,999 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:35:31,999 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:35:32,008 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,045 INFO L175 MemorySlicer]: Split 11 memory accesses to 5 slices as follows [2, 2, 2, 3, 2]. 27 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-20 12:35:32,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,062 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,070 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:35:32,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:35:32,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:35:32,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:35:32,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (1/1) ... [2024-02-20 12:35:32,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:35:32,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:35:32,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 12:35:32,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 12:35:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:35:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:35:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:35:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:35:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:35:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 12:35:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 12:35:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:35:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:35:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:35:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 12:35:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-20 12:35:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:35:32,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:35:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:35:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:35:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-20 12:35:32,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-20 12:35:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:35:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:35:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:35:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 12:35:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 12:35:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:35:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:35:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-20 12:35:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:35:32,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:35:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:35:32,178 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:35:32,295 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:35:32,296 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:35:32,496 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:35:32,496 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:35:32,734 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:35:32,734 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-20 12:35:32,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:35:32 BoogieIcfgContainer [2024-02-20 12:35:32,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:35:32,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:35:32,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:35:32,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:35:32,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:35:31" (1/3) ... [2024-02-20 12:35:32,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1503aa13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:35:32, skipping insertion in model container [2024-02-20 12:35:32,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:31" (2/3) ... [2024-02-20 12:35:32,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1503aa13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:35:32, skipping insertion in model container [2024-02-20 12:35:32,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:35:32" (3/3) ... [2024-02-20 12:35:32,743 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-02-20 12:35:32,760 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:35:32,760 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:35:32,760 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:35:32,806 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-20 12:35:32,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 38 transitions, 97 flow [2024-02-20 12:35:32,891 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2024-02-20 12:35:32,892 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-20 12:35:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 4/35 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-02-20 12:35:32,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 38 transitions, 97 flow [2024-02-20 12:35:32,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 34 transitions, 86 flow [2024-02-20 12:35:32,917 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:35:32,924 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;@551a198a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:35:32,924 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-20 12:35:32,935 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:35:32,936 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-02-20 12:35:32,937 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-20 12:35:32,937 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:32,942 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:35:32,943 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:35:32,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1181666893, now seen corresponding path program 1 times [2024-02-20 12:35:32,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:32,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144817056] [2024-02-20 12:35:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144817056] [2024-02-20 12:35:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144817056] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:35:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:35:33,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:35:33,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045358127] [2024-02-20 12:35:33,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:35:33,576 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-20 12:35:33,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-20 12:35:33,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-20 12:35:33,625 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-02-20 12:35:33,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:33,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:33,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-02-20 12:35:33,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:33,862 INFO L124 PetriNetUnfolderBase]: 842/1358 cut-off events. [2024-02-20 12:35:33,862 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-02-20 12:35:33,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 1358 events. 842/1358 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6616 event pairs, 63 based on Foata normal form. 92/1431 useless extension candidates. Maximal degree in co-relation 2340. Up to 457 conditions per place. [2024-02-20 12:35:33,878 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 56 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-02-20 12:35:33,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 293 flow [2024-02-20 12:35:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 12:35:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 12:35:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-02-20 12:35:33,889 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5657894736842105 [2024-02-20 12:35:33,892 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2024-02-20 12:35:33,892 INFO L507 AbstractCegarLoop]: Abstraction has has 45 places, 69 transitions, 293 flow [2024-02-20 12:35:33,892 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:33,893 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:33,893 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:35:33,893 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:35:33,893 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:35:33,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:33,894 INFO L85 PathProgramCache]: Analyzing trace with hash -998025946, now seen corresponding path program 1 times [2024-02-20 12:35:33,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:33,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963835291] [2024-02-20 12:35:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:33,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:33,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963835291] [2024-02-20 12:35:33,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963835291] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:35:33,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:35:33,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:35:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212946590] [2024-02-20 12:35:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:35:33,951 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:35:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:35:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:35:33,952 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-02-20 12:35:33,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 69 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:33,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:33,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-02-20 12:35:33,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:34,107 INFO L124 PetriNetUnfolderBase]: 741/1274 cut-off events. [2024-02-20 12:35:34,108 INFO L125 PetriNetUnfolderBase]: For 614/626 co-relation queries the response was YES. [2024-02-20 12:35:34,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3333 conditions, 1274 events. 741/1274 cut-off events. For 614/626 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5706 event pairs, 50 based on Foata normal form. 30/1288 useless extension candidates. Maximal degree in co-relation 2894. Up to 719 conditions per place. [2024-02-20 12:35:34,117 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 56 selfloop transitions, 3 changer transitions 13/89 dead transitions. [2024-02-20 12:35:34,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 89 transitions, 532 flow [2024-02-20 12:35:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:35:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:35:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-02-20 12:35:34,119 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6929824561403509 [2024-02-20 12:35:34,119 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2024-02-20 12:35:34,119 INFO L507 AbstractCegarLoop]: Abstraction has has 47 places, 89 transitions, 532 flow [2024-02-20 12:35:34,120 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:34,120 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:34,120 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:35:34,120 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:35:34,121 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:35:34,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1360346850, now seen corresponding path program 1 times [2024-02-20 12:35:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:34,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551210978] [2024-02-20 12:35:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:34,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:35:34,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:34,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551210978] [2024-02-20 12:35:34,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551210978] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:35:34,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:35:34,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:35:34,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114561499] [2024-02-20 12:35:34,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:35:34,217 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:35:34,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:34,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:35:34,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:35:34,218 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-02-20 12:35:34,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 89 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:34,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:34,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-02-20 12:35:34,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:34,407 INFO L124 PetriNetUnfolderBase]: 823/1460 cut-off events. [2024-02-20 12:35:34,407 INFO L125 PetriNetUnfolderBase]: For 1734/1826 co-relation queries the response was YES. [2024-02-20 12:35:34,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4723 conditions, 1460 events. 823/1460 cut-off events. For 1734/1826 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6924 event pairs, 78 based on Foata normal form. 14/1456 useless extension candidates. Maximal degree in co-relation 3616. Up to 823 conditions per place. [2024-02-20 12:35:34,414 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 58 selfloop transitions, 2 changer transitions 33/110 dead transitions. [2024-02-20 12:35:34,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 110 transitions, 862 flow [2024-02-20 12:35:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:35:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:35:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-02-20 12:35:34,419 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-02-20 12:35:34,420 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-02-20 12:35:34,420 INFO L507 AbstractCegarLoop]: Abstraction has has 50 places, 110 transitions, 862 flow [2024-02-20 12:35:34,420 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:34,420 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:34,421 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:35:34,421 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 12:35:34,421 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:35:34,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1761223112, now seen corresponding path program 1 times [2024-02-20 12:35:34,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:34,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253080400] [2024-02-20 12:35:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:34,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:35:34,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:34,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253080400] [2024-02-20 12:35:34,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253080400] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:35:34,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858213922] [2024-02-20 12:35:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:34,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:35:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:35:34,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:35:34,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:35:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:34,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:35:34,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:35:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:35:34,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:35:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:35:34,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858213922] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:35:34,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:35:34,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2024-02-20 12:35:34,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856047740] [2024-02-20 12:35:34,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:35:34,718 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 12:35:34,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:34,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 12:35:34,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-02-20 12:35:34,729 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-02-20 12:35:34,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 110 transitions, 862 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:34,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:34,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-02-20 12:35:34,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:35,525 INFO L124 PetriNetUnfolderBase]: 4275/6514 cut-off events. [2024-02-20 12:35:35,525 INFO L125 PetriNetUnfolderBase]: For 12325/12333 co-relation queries the response was YES. [2024-02-20 12:35:35,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25512 conditions, 6514 events. 4275/6514 cut-off events. For 12325/12333 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 34217 event pairs, 59 based on Foata normal form. 93/6289 useless extension candidates. Maximal degree in co-relation 21813. Up to 3499 conditions per place. [2024-02-20 12:35:35,550 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 127 selfloop transitions, 26 changer transitions 323/483 dead transitions. [2024-02-20 12:35:35,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 483 transitions, 4629 flow [2024-02-20 12:35:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-20 12:35:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-20 12:35:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 286 transitions. [2024-02-20 12:35:35,553 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5375939849624061 [2024-02-20 12:35:35,553 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-02-20 12:35:35,553 INFO L507 AbstractCegarLoop]: Abstraction has has 63 places, 483 transitions, 4629 flow [2024-02-20 12:35:35,554 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:35,554 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:35,554 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:35:35,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:35:35,767 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:35:35,768 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:35:35,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:35,769 INFO L85 PathProgramCache]: Analyzing trace with hash 904735016, now seen corresponding path program 2 times [2024-02-20 12:35:35,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:35,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440882121] [2024-02-20 12:35:35,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:35,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:36,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:36,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440882121] [2024-02-20 12:35:36,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440882121] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:35:36,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065781455] [2024-02-20 12:35:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:35:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:35:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:35:36,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:35:36,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:35:36,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:35:36,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:35:36,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-20 12:35:36,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:35:36,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-20 12:35:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:37,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:35:37,501 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 40 treesize of output 36 [2024-02-20 12:35:37,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:35:37,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2024-02-20 12:35:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:37,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065781455] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:35:37,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:35:37,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2024-02-20 12:35:37,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471843948] [2024-02-20 12:35:37,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:35:37,605 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-02-20 12:35:37,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-02-20 12:35:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2024-02-20 12:35:37,774 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 38 [2024-02-20 12:35:37,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 483 transitions, 4629 flow. Second operand has 32 states, 32 states have (on average 7.875) internal successors, (252), 32 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:37,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:37,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 38 [2024-02-20 12:35:37,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:45,246 INFO L124 PetriNetUnfolderBase]: 19071/28702 cut-off events. [2024-02-20 12:35:45,247 INFO L125 PetriNetUnfolderBase]: For 62095/62103 co-relation queries the response was YES. [2024-02-20 12:35:45,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134749 conditions, 28702 events. 19071/28702 cut-off events. For 62095/62103 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 180103 event pairs, 481 based on Foata normal form. 244/27825 useless extension candidates. Maximal degree in co-relation 47710. Up to 15844 conditions per place. [2024-02-20 12:35:45,376 INFO L140 encePairwiseOnDemand]: 20/38 looper letters, 434 selfloop transitions, 112 changer transitions 2228/2781 dead transitions. [2024-02-20 12:35:45,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 2781 transitions, 30171 flow [2024-02-20 12:35:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-02-20 12:35:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2024-02-20 12:35:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 1341 transitions. [2024-02-20 12:35:45,381 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37541993281075026 [2024-02-20 12:35:45,381 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 116 predicate places. [2024-02-20 12:35:45,382 INFO L507 AbstractCegarLoop]: Abstraction has has 156 places, 2781 transitions, 30171 flow [2024-02-20 12:35:45,382 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.875) internal successors, (252), 32 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:45,382 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:45,382 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:35:45,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:35:45,596 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 12:35:45,597 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:35:45,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 887168208, now seen corresponding path program 3 times [2024-02-20 12:35:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:45,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282490735] [2024-02-20 12:35:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:45,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:46,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:46,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282490735] [2024-02-20 12:35:46,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282490735] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:35:46,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373432116] [2024-02-20 12:35:46,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:35:46,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:35:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:35:46,789 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:35:46,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:35:46,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:35:46,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:35:46,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2024-02-20 12:35:46,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:35:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 12:35:47,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:35:47,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:35:47,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-02-20 12:35:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 12:35:47,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373432116] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:35:47,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:35:47,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-02-20 12:35:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662694184] [2024-02-20 12:35:47,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:35:47,483 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 12:35:47,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 12:35:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 12:35:47,546 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 38 [2024-02-20 12:35:47,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 2781 transitions, 30171 flow. Second operand has 33 states, 33 states have (on average 6.7272727272727275) internal successors, (222), 33 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:35:47,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:47,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 38 [2024-02-20 12:35:47,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:00,085 INFO L124 PetriNetUnfolderBase]: 25133/37579 cut-off events. [2024-02-20 12:36:00,085 INFO L125 PetriNetUnfolderBase]: For 81442/81442 co-relation queries the response was YES. [2024-02-20 12:36:00,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213732 conditions, 37579 events. 25133/37579 cut-off events. For 81442/81442 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 239020 event pairs, 242 based on Foata normal form. 164/36517 useless extension candidates. Maximal degree in co-relation 77790. Up to 20902 conditions per place. [2024-02-20 12:36:00,260 INFO L140 encePairwiseOnDemand]: 20/38 looper letters, 651 selfloop transitions, 205 changer transitions 3638/4495 dead transitions. [2024-02-20 12:36:00,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 4495 transitions, 56412 flow [2024-02-20 12:36:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-02-20 12:36:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-02-20 12:36:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 742 transitions. [2024-02-20 12:36:00,267 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3425669436749769 [2024-02-20 12:36:00,269 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 172 predicate places. [2024-02-20 12:36:00,269 INFO L507 AbstractCegarLoop]: Abstraction has has 212 places, 4495 transitions, 56412 flow [2024-02-20 12:36:00,270 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.7272727272727275) internal successors, (222), 33 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:36:00,270 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:00,271 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:36:00,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:00,487 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 12:36:00,488 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:36:00,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:00,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1736230269, now seen corresponding path program 4 times [2024-02-20 12:36:00,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:00,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63717836] [2024-02-20 12:36:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:00,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:36:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:00,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63717836] [2024-02-20 12:36:00,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63717836] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:00,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763206709] [2024-02-20 12:36:00,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:36:00,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:00,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:00,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:00,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:36:00,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:36:00,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:36:00,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-20 12:36:00,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:36:00,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:36:00,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763206709] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:00,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:00,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-02-20 12:36:00,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143263876] [2024-02-20 12:36:00,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:00,773 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-20 12:36:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:00,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-20 12:36:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-02-20 12:36:00,778 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-02-20 12:36:00,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 4495 transitions, 56412 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:36:00,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:00,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-02-20 12:36:00,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:26,962 INFO L124 PetriNetUnfolderBase]: 56608/84609 cut-off events. [2024-02-20 12:36:26,962 INFO L125 PetriNetUnfolderBase]: For 298418/298418 co-relation queries the response was YES. [2024-02-20 12:36:27,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531364 conditions, 84609 events. 56608/84609 cut-off events. For 298418/298418 co-relation queries the response was YES. Maximal size of possible extension queue 1662. Compared 590451 event pairs, 612 based on Foata normal form. 1176/82703 useless extension candidates. Maximal degree in co-relation 209530. Up to 47884 conditions per place. [2024-02-20 12:36:27,416 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 962 selfloop transitions, 65 changer transitions 6796/8079 dead transitions. [2024-02-20 12:36:27,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 8079 transitions, 121102 flow [2024-02-20 12:36:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:36:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:36:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-02-20 12:36:27,418 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7763157894736842 [2024-02-20 12:36:27,418 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 175 predicate places. [2024-02-20 12:36:27,418 INFO L507 AbstractCegarLoop]: Abstraction has has 215 places, 8079 transitions, 121102 flow [2024-02-20 12:36:27,419 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:36:27,419 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:27,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:36:27,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:27,632 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 12:36:27,634 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:36:27,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2010505149, now seen corresponding path program 5 times [2024-02-20 12:36:27,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:27,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889639316] [2024-02-20 12:36:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:27,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:36:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:27,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889639316] [2024-02-20 12:36:27,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889639316] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:27,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549290791] [2024-02-20 12:36:27,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:36:27,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:27,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:27,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:36:27,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:36:27,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:36:27,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:36:27,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:36:27,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:36:27,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549290791] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:27,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:27,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-20 12:36:27,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989443267] [2024-02-20 12:36:27,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:27,983 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:36:27,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:27,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:36:27,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:36:27,984 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-02-20 12:36:27,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 8079 transitions, 121102 flow. Second operand has 12 states, 12 states have (on average 18.0) internal successors, (216), 12 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:36:27,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:27,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-02-20 12:36:27,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:37:06,772 INFO L124 PetriNetUnfolderBase]: 46046/69057 cut-off events. [2024-02-20 12:37:06,773 INFO L125 PetriNetUnfolderBase]: For 358533/358533 co-relation queries the response was YES. [2024-02-20 12:37:06,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472411 conditions, 69057 events. 46046/69057 cut-off events. For 358533/358533 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 466042 event pairs, 492 based on Foata normal form. 182/66753 useless extension candidates. Maximal degree in co-relation 227538. Up to 38836 conditions per place. [2024-02-20 12:37:07,226 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 824 selfloop transitions, 3 changer transitions 5817/6852 dead transitions. [2024-02-20 12:37:07,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 6852 transitions, 112816 flow [2024-02-20 12:37:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 12:37:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 12:37:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-02-20 12:37:07,228 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6278195488721805 [2024-02-20 12:37:07,232 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 180 predicate places. [2024-02-20 12:37:07,232 INFO L507 AbstractCegarLoop]: Abstraction has has 220 places, 6852 transitions, 112816 flow [2024-02-20 12:37:07,232 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.0) internal successors, (216), 12 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:37:07,233 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:37:07,233 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:37:07,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-02-20 12:37:07,448 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 12:37:07,449 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-20 12:37:07,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:37:07,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1629408773, now seen corresponding path program 6 times [2024-02-20 12:37:07,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:37:07,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992803721] [2024-02-20 12:37:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:37:07,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:37:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:37:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:08,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:37:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992803721] [2024-02-20 12:37:08,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992803721] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:37:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999512652] [2024-02-20 12:37:08,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:37:08,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:37:08,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:37:08,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:37:08,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:37:08,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 12:37:08,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:37:08,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-20 12:37:09,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:37:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:09,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:37:09,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:37:09,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2024-02-20 12:37:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:10,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999512652] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:37:10,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:37:10,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2024-02-20 12:37:10,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907453868] [2024-02-20 12:37:10,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:37:10,330 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-02-20 12:37:10,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:37:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-02-20 12:37:10,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2024-02-20 12:37:10,481 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-02-20 12:37:10,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 6852 transitions, 112816 flow. Second operand has 43 states, 43 states have (on average 10.488372093023257) internal successors, (451), 43 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:37:10,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:37:10,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-02-20 12:37:10,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand