./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c --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/weaver/popl20-bad-buffer-mult-alt.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 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:19:06,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:19:06,595 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:19:06,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:19:06,598 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:19:06,628 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:19:06,629 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:19:06,629 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:19:06,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:19:06,633 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:19:06,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:19:06,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:19:06,634 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:19:06,635 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:19:06,635 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:19:06,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:19:06,635 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:19:06,636 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:19:06,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:19:06,637 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:19:06,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:19:06,648 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:19:06,648 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:19:06,648 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:19:06,648 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:19:06,648 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:19:06,649 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:19:06,649 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:19:06,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:19:06,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:19:06,650 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:19:06,651 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:19:06,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:19:06,651 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:19:06,651 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:19:06,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:19:06,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:19:06,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:19:06,651 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:19:06,651 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:19:06,652 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:19:06,652 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:19:06,652 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:19:06,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-01-27 16:19:07,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:19:07,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:19:07,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:19:07,029 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:19:07,029 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:19:07,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-01-27 16:19:08,094 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:19:08,257 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:19:08,258 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-01-27 16:19:08,265 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c620138e/12d8fa9a95df457ab39fcac2a3c6df85/FLAG5fa2ca8c2 [2024-01-27 16:19:08,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c620138e/12d8fa9a95df457ab39fcac2a3c6df85 [2024-01-27 16:19:08,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:19:08,284 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:19:08,285 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:19:08,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:19:08,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:19:08,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4597a72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08, skipping insertion in model container [2024-01-27 16:19:08,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,311 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:19:08,463 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-bad-buffer-mult-alt.wvr.c[4345,4358] [2024-01-27 16:19:08,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:19:08,477 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:19:08,500 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-bad-buffer-mult-alt.wvr.c[4345,4358] [2024-01-27 16:19:08,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:19:08,518 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:19:08,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08 WrapperNode [2024-01-27 16:19:08,519 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:19:08,520 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:19:08,520 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:19:08,520 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:19:08,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,532 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,554 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 335 [2024-01-27 16:19:08,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:19:08,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:19:08,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:19:08,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:19:08,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,573 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,587 INFO L175 MemorySlicer]: Split 16 memory accesses to 6 slices as follows [2, 2, 2, 6, 2, 2]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 2, 1, 1]. [2024-01-27 16:19:08,587 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,587 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,594 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,598 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,601 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:19:08,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:19:08,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:19:08,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:19:08,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (1/1) ... [2024-01-27 16:19:08,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:19:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:08,681 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 16:19:08,732 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 16:19:08,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:19:08,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:19:08,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:19:08,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:19:08,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:19:08,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:19:08,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 16:19:08,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-27 16:19:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 16:19:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 16:19:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 16:19:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 16:19:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 16:19:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-27 16:19:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 16:19:08,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 16:19:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 16:19:08,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 16:19:08,807 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 16:19:08,807 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 16:19:08,807 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-27 16:19:08,807 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-27 16:19:08,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:19:08,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:19:08,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:19:08,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:19:08,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 16:19:08,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-27 16:19:08,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 16:19:08,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 16:19:08,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 16:19:08,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:19:08,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:19:08,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:19:08,811 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 16:19:08,974 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:19:08,976 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:19:09,272 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:19:09,272 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:19:09,727 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:19:09,727 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-27 16:19:09,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:19:09 BoogieIcfgContainer [2024-01-27 16:19:09,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:19:09,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:19:09,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:19:09,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:19:09,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:19:08" (1/3) ... [2024-01-27 16:19:09,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f07475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:19:09, skipping insertion in model container [2024-01-27 16:19:09,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:08" (2/3) ... [2024-01-27 16:19:09,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f07475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:19:09, skipping insertion in model container [2024-01-27 16:19:09,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:19:09" (3/3) ... [2024-01-27 16:19:09,735 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-01-27 16:19:09,742 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:19:09,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:19:09,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 16:19:09,749 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:19:09,808 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 16:19:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 53 transitions, 134 flow [2024-01-27 16:19:09,865 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2024-01-27 16:19:09,865 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 16:19:09,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 49 events. 6/49 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-01-27 16:19:09,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 53 transitions, 134 flow [2024-01-27 16:19:09,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 48 transitions, 120 flow [2024-01-27 16:19:09,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:19:09,882 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;@335b650f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:19:09,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 16:19:09,934 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:19:09,935 INFO L124 PetriNetUnfolderBase]: 6/47 cut-off events. [2024-01-27 16:19:09,935 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 16:19:09,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:09,936 INFO L208 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] [2024-01-27 16:19:09,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:09,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:09,940 INFO L85 PathProgramCache]: Analyzing trace with hash 654972097, now seen corresponding path program 1 times [2024-01-27 16:19:09,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:09,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046042422] [2024-01-27 16:19:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:09,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:10,485 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 16:19:10,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:10,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046042422] [2024-01-27 16:19:10,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046042422] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:10,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:10,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 16:19:10,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434400879] [2024-01-27 16:19:10,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:10,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 16:19:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 16:19:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 16:19:10,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-01-27 16:19:10,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:10,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:10,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-01-27 16:19:10,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:11,386 INFO L124 PetriNetUnfolderBase]: 4347/6153 cut-off events. [2024-01-27 16:19:11,387 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2024-01-27 16:19:11,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12111 conditions, 6153 events. 4347/6153 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34510 event pairs, 225 based on Foata normal form. 252/6312 useless extension candidates. Maximal degree in co-relation 9874. Up to 3141 conditions per place. [2024-01-27 16:19:11,430 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 79 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2024-01-27 16:19:11,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 101 transitions, 431 flow [2024-01-27 16:19:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:19:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:19:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2024-01-27 16:19:11,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352201257861635 [2024-01-27 16:19:11,443 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 120 flow. Second operand 6 states and 202 transitions. [2024-01-27 16:19:11,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 101 transitions, 431 flow [2024-01-27 16:19:11,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 101 transitions, 393 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 16:19:11,458 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 151 flow [2024-01-27 16:19:11,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-01-27 16:19:11,463 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-01-27 16:19:11,463 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 151 flow [2024-01-27 16:19:11,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:11,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:11,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:11,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 16:19:11,465 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:11,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1978876740, now seen corresponding path program 1 times [2024-01-27 16:19:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:11,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483560506] [2024-01-27 16:19:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:11,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:11,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483560506] [2024-01-27 16:19:11,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483560506] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:11,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:11,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:19:11,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612844802] [2024-01-27 16:19:11,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:11,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:11,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-01-27 16:19:11,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:11,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:11,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-01-27 16:19:11,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:11,997 INFO L124 PetriNetUnfolderBase]: 2549/3798 cut-off events. [2024-01-27 16:19:11,998 INFO L125 PetriNetUnfolderBase]: For 1604/1852 co-relation queries the response was YES. [2024-01-27 16:19:12,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8883 conditions, 3798 events. 2549/3798 cut-off events. For 1604/1852 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21524 event pairs, 351 based on Foata normal form. 326/3976 useless extension candidates. Maximal degree in co-relation 3576. Up to 2961 conditions per place. [2024-01-27 16:19:12,029 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 46 selfloop transitions, 2 changer transitions 4/71 dead transitions. [2024-01-27 16:19:12,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 296 flow [2024-01-27 16:19:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-01-27 16:19:12,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.710691823899371 [2024-01-27 16:19:12,031 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 151 flow. Second operand 3 states and 113 transitions. [2024-01-27 16:19:12,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 296 flow [2024-01-27 16:19:12,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 16:19:12,035 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 158 flow [2024-01-27 16:19:12,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-01-27 16:19:12,036 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-01-27 16:19:12,036 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 158 flow [2024-01-27 16:19:12,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:12,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:12,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:12,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 16:19:12,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:12,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:12,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1662574272, now seen corresponding path program 1 times [2024-01-27 16:19:12,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:12,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975017230] [2024-01-27 16:19:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:12,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:12,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:12,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975017230] [2024-01-27 16:19:12,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975017230] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:19:12,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504876885] [2024-01-27 16:19:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:12,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:12,233 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) [2024-01-27 16:19:12,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 16:19:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:12,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:19:12,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:12,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:19:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:12,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504876885] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:19:12,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:19:12,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2024-01-27 16:19:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450117435] [2024-01-27 16:19:12,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:19:12,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 16:19:12,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 16:19:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-01-27 16:19:12,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-01-27 16:19:12,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 158 flow. Second operand has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 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 16:19:12,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:12,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-01-27 16:19:12,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:14,740 INFO L124 PetriNetUnfolderBase]: 15877/20234 cut-off events. [2024-01-27 16:19:14,740 INFO L125 PetriNetUnfolderBase]: For 4517/4517 co-relation queries the response was YES. [2024-01-27 16:19:14,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46981 conditions, 20234 events. 15877/20234 cut-off events. For 4517/4517 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 103154 event pairs, 425 based on Foata normal form. 380/19951 useless extension candidates. Maximal degree in co-relation 14123. Up to 3704 conditions per place. [2024-01-27 16:19:14,856 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 247 selfloop transitions, 31 changer transitions 0/289 dead transitions. [2024-01-27 16:19:14,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 289 transitions, 1315 flow [2024-01-27 16:19:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 16:19:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 16:19:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 580 transitions. [2024-01-27 16:19:14,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-01-27 16:19:14,859 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 158 flow. Second operand 20 states and 580 transitions. [2024-01-27 16:19:14,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 289 transitions, 1315 flow [2024-01-27 16:19:14,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 289 transitions, 1312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:14,880 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 387 flow [2024-01-27 16:19:14,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=387, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2024-01-27 16:19:14,881 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-01-27 16:19:14,881 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 387 flow [2024-01-27 16:19:14,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 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 16:19:14,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:14,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:14,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 16:19:15,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:15,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:15,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1137124135, now seen corresponding path program 1 times [2024-01-27 16:19:15,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:15,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889268740] [2024-01-27 16:19:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:19:15,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:15,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889268740] [2024-01-27 16:19:15,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889268740] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:15,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:15,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:19:15,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032796416] [2024-01-27 16:19:15,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:15,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 16:19:15,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 16:19:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 16:19:15,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-01-27 16:19:15,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 16:19:15,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:15,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-01-27 16:19:15,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:16,383 INFO L124 PetriNetUnfolderBase]: 6993/10548 cut-off events. [2024-01-27 16:19:16,383 INFO L125 PetriNetUnfolderBase]: For 29708/30344 co-relation queries the response was YES. [2024-01-27 16:19:16,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33143 conditions, 10548 events. 6993/10548 cut-off events. For 29708/30344 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 72067 event pairs, 4217 based on Foata normal form. 436/10095 useless extension candidates. Maximal degree in co-relation 22979. Up to 8845 conditions per place. [2024-01-27 16:19:16,453 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 45 selfloop transitions, 2 changer transitions 16/94 dead transitions. [2024-01-27 16:19:16,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 94 transitions, 557 flow [2024-01-27 16:19:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 16:19:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 16:19:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-01-27 16:19:16,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811320754716981 [2024-01-27 16:19:16,455 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 387 flow. Second operand 5 states and 154 transitions. [2024-01-27 16:19:16,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 94 transitions, 557 flow [2024-01-27 16:19:16,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 94 transitions, 512 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-01-27 16:19:16,509 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 363 flow [2024-01-27 16:19:16,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2024-01-27 16:19:16,510 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-01-27 16:19:16,510 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 363 flow [2024-01-27 16:19:16,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 16:19:16,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:16,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:16,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 16:19:16,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:16,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1661549580, now seen corresponding path program 1 times [2024-01-27 16:19:16,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:16,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404392878] [2024-01-27 16:19:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:16,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:17,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:17,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404392878] [2024-01-27 16:19:17,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404392878] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:19:17,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366379483] [2024-01-27 16:19:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:17,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:17,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:17,101 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) [2024-01-27 16:19:17,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 16:19:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:17,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 16:19:17,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:17,251 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 [2024-01-27 16:19:17,478 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 15 treesize of output 7 [2024-01-27 16:19:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:17,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:19:17,764 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 39 treesize of output 35 [2024-01-27 16:19:17,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-01-27 16:19:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:17,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366379483] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:19:17,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:19:17,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-27 16:19:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783890188] [2024-01-27 16:19:17,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:19:17,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:19:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:19:17,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:19:17,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-01-27 16:19:17,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 363 flow. Second operand has 18 states, 18 states have (on average 23.944444444444443) internal successors, (431), 18 states have internal predecessors, (431), 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 16:19:17,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:17,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-01-27 16:19:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:22,300 INFO L124 PetriNetUnfolderBase]: 22832/34398 cut-off events. [2024-01-27 16:19:22,300 INFO L125 PetriNetUnfolderBase]: For 74257/75647 co-relation queries the response was YES. [2024-01-27 16:19:22,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104566 conditions, 34398 events. 22832/34398 cut-off events. For 74257/75647 co-relation queries the response was YES. Maximal size of possible extension queue 1677. Compared 256027 event pairs, 1227 based on Foata normal form. 1116/34705 useless extension candidates. Maximal degree in co-relation 104538. Up to 11430 conditions per place. [2024-01-27 16:19:22,640 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 286 selfloop transitions, 61 changer transitions 2/380 dead transitions. [2024-01-27 16:19:22,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 380 transitions, 2232 flow [2024-01-27 16:19:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 16:19:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 16:19:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 739 transitions. [2024-01-27 16:19:22,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6639712488769093 [2024-01-27 16:19:22,643 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 363 flow. Second operand 21 states and 739 transitions. [2024-01-27 16:19:22,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 380 transitions, 2232 flow [2024-01-27 16:19:23,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 380 transitions, 2192 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-01-27 16:19:23,107 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 843 flow [2024-01-27 16:19:23,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=843, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-01-27 16:19:23,108 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-01-27 16:19:23,108 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 843 flow [2024-01-27 16:19:23,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.944444444444443) internal successors, (431), 18 states have internal predecessors, (431), 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 16:19:23,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:23,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:23,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-27 16:19:23,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:23,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:23,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash 85288545, now seen corresponding path program 1 times [2024-01-27 16:19:23,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:23,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677713804] [2024-01-27 16:19:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:23,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:19:24,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:24,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677713804] [2024-01-27 16:19:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677713804] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:19:24,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823664931] [2024-01-27 16:19:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:24,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:24,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:24,561 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) [2024-01-27 16:19:24,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 16:19:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:24,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 16:19:24,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:24,828 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 25 treesize of output 7 [2024-01-27 16:19:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:19:24,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:19:24,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:19:24,922 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 26 treesize of output 18 [2024-01-27 16:19:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:19:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823664931] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:19:25,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:19:25,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2024-01-27 16:19:25,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362844013] [2024-01-27 16:19:25,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:19:25,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 16:19:25,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 16:19:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-01-27 16:19:25,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-01-27 16:19:25,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 843 flow. Second operand has 14 states, 14 states have (on average 25.357142857142858) internal successors, (355), 14 states have internal predecessors, (355), 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 16:19:25,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:25,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-01-27 16:19:25,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:30,880 INFO L124 PetriNetUnfolderBase]: 33460/50697 cut-off events. [2024-01-27 16:19:30,881 INFO L125 PetriNetUnfolderBase]: For 159796/162205 co-relation queries the response was YES. [2024-01-27 16:19:31,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170128 conditions, 50697 events. 33460/50697 cut-off events. For 159796/162205 co-relation queries the response was YES. Maximal size of possible extension queue 2490. Compared 401961 event pairs, 2448 based on Foata normal form. 1552/51079 useless extension candidates. Maximal degree in co-relation 129371. Up to 16949 conditions per place. [2024-01-27 16:19:31,433 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 213 selfloop transitions, 99 changer transitions 2/345 dead transitions. [2024-01-27 16:19:31,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 345 transitions, 2384 flow [2024-01-27 16:19:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 16:19:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 16:19:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 592 transitions. [2024-01-27 16:19:31,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205450733752621 [2024-01-27 16:19:31,437 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 843 flow. Second operand 18 states and 592 transitions. [2024-01-27 16:19:31,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 345 transitions, 2384 flow [2024-01-27 16:19:32,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 345 transitions, 2354 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:32,608 INFO L231 Difference]: Finished difference. Result has 132 places, 189 transitions, 1551 flow [2024-01-27 16:19:32,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1551, PETRI_PLACES=132, PETRI_TRANSITIONS=189} [2024-01-27 16:19:32,609 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-01-27 16:19:32,609 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 189 transitions, 1551 flow [2024-01-27 16:19:32,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.357142857142858) internal successors, (355), 14 states have internal predecessors, (355), 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 16:19:32,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:32,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:32,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:32,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:32,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:32,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1474609451, now seen corresponding path program 1 times [2024-01-27 16:19:32,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:32,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604010074] [2024-01-27 16:19:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:32,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:19:33,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:33,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604010074] [2024-01-27 16:19:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604010074] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:33,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:33,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:19:33,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010941709] [2024-01-27 16:19:33,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:33,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:33,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:33,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:33,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-01-27 16:19:33,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 189 transitions, 1551 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 16:19:33,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:33,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-01-27 16:19:33,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:40,400 INFO L124 PetriNetUnfolderBase]: 40893/63162 cut-off events. [2024-01-27 16:19:40,401 INFO L125 PetriNetUnfolderBase]: For 382789/387466 co-relation queries the response was YES. [2024-01-27 16:19:40,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241481 conditions, 63162 events. 40893/63162 cut-off events. For 382789/387466 co-relation queries the response was YES. Maximal size of possible extension queue 3109. Compared 533661 event pairs, 10207 based on Foata normal form. 3774/64334 useless extension candidates. Maximal degree in co-relation 240487. Up to 39473 conditions per place. [2024-01-27 16:19:41,119 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 231 selfloop transitions, 9 changer transitions 0/271 dead transitions. [2024-01-27 16:19:41,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 271 transitions, 2864 flow [2024-01-27 16:19:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-01-27 16:19:41,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7295597484276729 [2024-01-27 16:19:41,121 INFO L175 Difference]: Start difference. First operand has 132 places, 189 transitions, 1551 flow. Second operand 3 states and 116 transitions. [2024-01-27 16:19:41,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 271 transitions, 2864 flow [2024-01-27 16:19:42,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 271 transitions, 2792 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-01-27 16:19:42,364 INFO L231 Difference]: Finished difference. Result has 132 places, 190 transitions, 1590 flow [2024-01-27 16:19:42,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1590, PETRI_PLACES=132, PETRI_TRANSITIONS=190} [2024-01-27 16:19:42,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-01-27 16:19:42,365 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 190 transitions, 1590 flow [2024-01-27 16:19:42,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 16:19:42,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:42,365 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:42,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 16:19:42,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:42,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1438083513, now seen corresponding path program 2 times [2024-01-27 16:19:42,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:42,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753996841] [2024-01-27 16:19:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:42,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:19:42,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:42,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753996841] [2024-01-27 16:19:42,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753996841] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:42,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:42,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 16:19:42,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086892435] [2024-01-27 16:19:42,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:42,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 16:19:42,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 16:19:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-27 16:19:42,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-01-27 16:19:42,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 190 transitions, 1590 flow. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 16:19:42,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:42,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-01-27 16:19:42,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand