./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:09:06,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:09:06,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:09:06,187 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:09:06,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:09:06,202 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:09:06,202 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:09:06,203 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:09:06,203 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:09:06,203 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:09:06,204 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:09:06,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:09:06,205 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:09:06,205 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:09:06,205 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:09:06,206 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:09:06,206 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:09:06,206 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:09:06,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:09:06,207 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:09:06,207 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:09:06,207 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:09:06,208 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:09:06,208 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:09:06,208 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:09:06,209 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:09:06,209 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:09:06,209 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:09:06,210 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:09:06,210 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:09:06,210 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:09:06,211 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:09:06,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:09:06,211 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:09:06,211 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:09:06,212 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:09:06,212 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:09:06,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:09:06,213 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:09:06,213 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:09:06,213 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:09:06,213 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:09:06,213 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:09:06,214 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 [2024-01-27 15:09:06,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:09:06,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:09:06,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:09:06,385 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:09:06,385 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:09:06,386 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2024-01-27 15:09:07,547 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:09:07,782 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:09:07,783 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2024-01-27 15:09:07,795 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc13e0968/98b9c7ccd74944c2b7c689cfeed30e2e/FLAGd57ab91c6 [2024-01-27 15:09:07,806 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc13e0968/98b9c7ccd74944c2b7c689cfeed30e2e [2024-01-27 15:09:07,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:09:07,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:09:07,817 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:09:07,817 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:09:07,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:09:07,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:09:07" (1/1) ... [2024-01-27 15:09:07,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee319a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:07, skipping insertion in model container [2024-01-27 15:09:07,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:09:07" (1/1) ... [2024-01-27 15:09:07,869 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:09:08,115 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30869,30882] [2024-01-27 15:09:08,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:09:08,136 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:09:08,185 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30869,30882] [2024-01-27 15:09:08,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:09:08,214 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:09:08,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08 WrapperNode [2024-01-27 15:09:08,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:09:08,216 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:09:08,216 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:09:08,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:09:08,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,260 INFO L138 Inliner]: procedures = 172, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 105 [2024-01-27 15:09:08,261 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:09:08,283 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:09:08,283 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:09:08,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:09:08,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,293 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,303 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 1, 6, 3, 5]. 35 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 0, 1]. The 6 writes are split as follows [0, 1, 2, 2, 1]. [2024-01-27 15:09:08,303 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,303 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:09:08,314 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:09:08,314 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:09:08,314 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:09:08,315 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (1/1) ... [2024-01-27 15:09:08,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:09:08,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:09:08,347 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) [2024-01-27 15:09:08,359 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 [2024-01-27 15:09:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:09:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:09:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:09:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:09:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:09:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-27 15:09:08,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-27 15:09:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:09:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:09:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:09:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:09:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:09:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:09:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:09:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:09:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:09:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:09:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:09:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:09:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:09:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:09:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:09:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:09:08,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:09:08,387 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:09:08,479 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:09:08,481 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:09:08,672 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:09:08,673 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:09:08,758 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:09:08,758 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:09:08,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:09:08 BoogieIcfgContainer [2024-01-27 15:09:08,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:09:08,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:09:08,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:09:08,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:09:08,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:09:07" (1/3) ... [2024-01-27 15:09:08,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e49d278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:09:08, skipping insertion in model container [2024-01-27 15:09:08,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:08" (2/3) ... [2024-01-27 15:09:08,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e49d278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:09:08, skipping insertion in model container [2024-01-27 15:09:08,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:09:08" (3/3) ... [2024-01-27 15:09:08,765 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2024-01-27 15:09:08,772 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:09:08,779 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:09:08,780 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:09:08,780 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:09:08,808 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:08,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 22 transitions, 48 flow [2024-01-27 15:09:08,855 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-27 15:09:08,856 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:08,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 24 events. 3/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-01-27 15:09:08,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 22 transitions, 48 flow [2024-01-27 15:09:08,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 22 transitions, 48 flow [2024-01-27 15:09:08,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:08,875 INFO L357 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b1d7e02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:08,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:09:08,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:08,879 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2024-01-27 15:09:08,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:08,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:08,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 15:09:08,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-01-27 15:09:08,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash 816437723, now seen corresponding path program 1 times [2024-01-27 15:09:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:08,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310649345] [2024-01-27 15:09:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:08,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:09,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:09,045 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:09,046 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:09,047 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-01-27 15:09:09,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-01-27 15:09:09,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-01-27 15:09:09,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:09:09,049 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:09:09,054 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:09,054 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:09:09,097 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:09,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 39 transitions, 88 flow [2024-01-27 15:09:09,110 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-01-27 15:09:09,110 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:09:09,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 44 events. 6/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2024-01-27 15:09:09,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 39 transitions, 88 flow [2024-01-27 15:09:09,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 39 transitions, 88 flow [2024-01-27 15:09:09,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:09,129 INFO L357 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b1d7e02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:09,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:09:09,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:09,140 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2024-01-27 15:09:09,140 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:09:09,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:09,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 15:09:09,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-01-27 15:09:09,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash 297922029, now seen corresponding path program 1 times [2024-01-27 15:09:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:09,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873892814] [2024-01-27 15:09:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:09,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:09,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:09,280 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:09,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 15:09:09,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 15:09:09,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-01-27 15:09:09,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 15:09:09,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:09:09,281 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:09:09,282 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:09,282 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:09:09,316 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:09,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 130 flow [2024-01-27 15:09:09,344 INFO L124 PetriNetUnfolderBase]: 9/64 cut-off events. [2024-01-27 15:09:09,348 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:09:09,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 9/64 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 156 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2024-01-27 15:09:09,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 56 transitions, 130 flow [2024-01-27 15:09:09,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 56 transitions, 130 flow [2024-01-27 15:09:09,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:09,360 INFO L357 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b1d7e02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:09,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:09:09,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:09,368 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2024-01-27 15:09:09,368 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:09:09,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:09,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:09,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:09:09,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:09,370 INFO L85 PathProgramCache]: Analyzing trace with hash -266219516, now seen corresponding path program 1 times [2024-01-27 15:09:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312891310] [2024-01-27 15:09:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:09,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:09,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312891310] [2024-01-27 15:09:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312891310] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:09,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:09,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101079002] [2024-01-27 15:09:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:09,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:09:09,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:09:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:09:09,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 56 [2024-01-27 15:09:09,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 130 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2024-01-27 15:09:09,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:09,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 56 [2024-01-27 15:09:09,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:11,365 INFO L124 PetriNetUnfolderBase]: 16061/21909 cut-off events. [2024-01-27 15:09:11,370 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2024-01-27 15:09:11,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44230 conditions, 21909 events. 16061/21909 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 110214 event pairs, 13319 based on Foata normal form. 1369/20470 useless extension candidates. Maximal degree in co-relation 25175. Up to 21703 conditions per place. [2024-01-27 15:09:11,501 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 42 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2024-01-27 15:09:11,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 200 flow [2024-01-27 15:09:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:09:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:09:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 63 transitions. [2024-01-27 15:09:11,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-01-27 15:09:11,512 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 130 flow. Second operand 2 states and 63 transitions. [2024-01-27 15:09:11,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 200 flow [2024-01-27 15:09:11,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 198 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-27 15:09:11,520 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 114 flow [2024-01-27 15:09:11,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-01-27 15:09:11,524 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2024-01-27 15:09:11,524 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 114 flow [2024-01-27 15:09:11,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2024-01-27 15:09:11,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:11,525 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 15:09:11,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:09:11,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:09:11,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash -669457510, now seen corresponding path program 1 times [2024-01-27 15:09:11,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:11,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147689248] [2024-01-27 15:09:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:11,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:11,575 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:11,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:11,586 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:11,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 15:09:11,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 15:09:11,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-27 15:09:11,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 15:09:11,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 15:09:11,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:09:11,587 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:09:11,588 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:11,588 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 15:09:11,633 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:11,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 73 transitions, 174 flow [2024-01-27 15:09:11,640 INFO L124 PetriNetUnfolderBase]: 12/84 cut-off events. [2024-01-27 15:09:11,641 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-27 15:09:11,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 84 events. 12/84 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 226 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 76. Up to 5 conditions per place. [2024-01-27 15:09:11,641 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 73 transitions, 174 flow [2024-01-27 15:09:11,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 73 transitions, 174 flow [2024-01-27 15:09:11,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:11,643 INFO L357 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b1d7e02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:11,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:09:11,646 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:11,646 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2024-01-27 15:09:11,646 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:09:11,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:11,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:11,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:09:11,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash -19319388, now seen corresponding path program 1 times [2024-01-27 15:09:11,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:11,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38507181] [2024-01-27 15:09:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:11,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:11,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38507181] [2024-01-27 15:09:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38507181] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:11,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:11,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562357592] [2024-01-27 15:09:11,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:11,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:09:11,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:09:11,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:09:11,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 73 [2024-01-27 15:09:11,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 174 flow. Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2024-01-27 15:09:11,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:11,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 73 [2024-01-27 15:09:11,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:34,464 INFO L124 PetriNetUnfolderBase]: 266341/336197 cut-off events. [2024-01-27 15:09:34,464 INFO L125 PetriNetUnfolderBase]: For 18924/18924 co-relation queries the response was YES. [2024-01-27 15:09:34,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679577 conditions, 336197 events. 266341/336197 cut-off events. For 18924/18924 co-relation queries the response was YES. Maximal size of possible extension queue 4979. Compared 1897053 event pairs, 222127 based on Foata normal form. 22081/313337 useless extension candidates. Maximal degree in co-relation 195411. Up to 334121 conditions per place. [2024-01-27 15:09:36,228 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 55 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2024-01-27 15:09:36,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 266 flow [2024-01-27 15:09:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:09:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:09:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 82 transitions. [2024-01-27 15:09:36,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2024-01-27 15:09:36,232 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 174 flow. Second operand 2 states and 82 transitions. [2024-01-27 15:09:36,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 266 flow [2024-01-27 15:09:36,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 260 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-27 15:09:36,252 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 150 flow [2024-01-27 15:09:36,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=150, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-01-27 15:09:36,253 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -4 predicate places. [2024-01-27 15:09:36,253 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 150 flow [2024-01-27 15:09:36,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2024-01-27 15:09:36,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:36,254 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:36,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:09:36,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:09:36,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash -877763859, now seen corresponding path program 1 times [2024-01-27 15:09:36,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:36,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084524252] [2024-01-27 15:09:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:36,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:36,284 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:36,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:36,311 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:36,311 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-01-27 15:09:36,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-01-27 15:09:36,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-01-27 15:09:36,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-01-27 15:09:36,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-01-27 15:09:36,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-01-27 15:09:36,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:09:36,317 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:09:36,318 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:36,318 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-27 15:09:36,364 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:36,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 220 flow [2024-01-27 15:09:36,375 INFO L124 PetriNetUnfolderBase]: 15/104 cut-off events. [2024-01-27 15:09:36,375 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 15:09:36,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 104 events. 15/104 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 307 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2024-01-27 15:09:36,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 90 transitions, 220 flow [2024-01-27 15:09:36,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 90 transitions, 220 flow [2024-01-27 15:09:36,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:36,385 INFO L357 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b1d7e02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:36,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-27 15:09:36,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:36,390 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2024-01-27 15:09:36,390 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:09:36,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:36,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:36,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-01-27 15:09:36,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash -788536892, now seen corresponding path program 1 times [2024-01-27 15:09:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:36,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798866472] [2024-01-27 15:09:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:36,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:36,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:36,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798866472] [2024-01-27 15:09:36,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798866472] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:36,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:36,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:36,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618235771] [2024-01-27 15:09:36,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:36,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:09:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:09:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:09:36,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 90 [2024-01-27 15:09:36,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 90 transitions, 220 flow. Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 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) [2024-01-27 15:09:36,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:36,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 90 [2024-01-27 15:09:36,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand