./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a 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-queue-add-2.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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 15:16:24,537 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 15:16:24,609 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 15:16:24,614 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 15:16:24,614 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 15:16:24,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 15:16:24,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 15:16:24,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 15:16:24,641 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 15:16:24,644 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 15:16:24,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 15:16:24,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 15:16:24,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 15:16:24,646 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 15:16:24,646 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 15:16:24,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 15:16:24,646 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 15:16:24,647 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 15:16:24,647 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 15:16:24,647 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 15:16:24,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 15:16:24,648 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 15:16:24,648 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 15:16:24,648 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 15:16:24,649 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 15:16:24,649 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 15:16:24,649 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 15:16:24,649 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 15:16:24,650 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 15:16:24,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 15:16:24,651 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 15:16:24,651 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 15:16:24,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 15:16:24,652 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 15:16:24,652 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 15:16:24,652 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 15:16:24,653 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 15:16:24,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 15:16:24,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 15:16:24,653 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 15:16:24,653 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 15:16:24,654 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 15:16:24,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 15:16:24,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 15:16:24,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 15:16:24,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 15:16:24,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 15:16:24,942 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 15:16:24,942 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 15:16:24,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-02-19 15:16:26,056 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 15:16:26,270 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 15:16:26,270 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-02-19 15:16:26,289 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c978e6e/bac83fc8844249c985885cd1304c654a/FLAG1c37b544a [2024-02-19 15:16:26,305 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c978e6e/bac83fc8844249c985885cd1304c654a [2024-02-19 15:16:26,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 15:16:26,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 15:16:26,317 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 15:16:26,317 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 15:16:26,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 15:16:26,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@418a4039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26, skipping insertion in model container [2024-02-19 15:16:26,323 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,342 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 15:16:26,497 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-queue-add-2.wvr.c[2696,2709] [2024-02-19 15:16:26,508 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 15:16:26,516 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 15:16:26,544 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-queue-add-2.wvr.c[2696,2709] [2024-02-19 15:16:26,550 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 15:16:26,562 INFO L206 MainTranslator]: Completed translation [2024-02-19 15:16:26,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26 WrapperNode [2024-02-19 15:16:26,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 15:16:26,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 15:16:26,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 15:16:26,566 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 15:16:26,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,610 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2024-02-19 15:16:26,610 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 15:16:26,611 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 15:16:26,611 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 15:16:26,611 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 15:16:26,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,631 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,649 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-19 15:16:26,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,659 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,672 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,676 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 15:16:26,677 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 15:16:26,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 15:16:26,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 15:16:26,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (1/1) ... [2024-02-19 15:16:26,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 15:16:26,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:26,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-19 15:16:26,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-19 15:16:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 15:16:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 15:16:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 15:16:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 15:16:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 15:16:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 15:16:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 15:16:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 15:16:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 15:16:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 15:16:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 15:16:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 15:16:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 15:16:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 15:16:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 15:16:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 15:16:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 15:16:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 15:16:26,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 15:16:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 15:16:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 15:16:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 15:16:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 15:16:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 15:16:26,782 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 15:16:26,857 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 15:16:26,859 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 15:16:27,064 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 15:16:27,065 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 15:16:27,212 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 15:16:27,212 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-19 15:16:27,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 03:16:27 BoogieIcfgContainer [2024-02-19 15:16:27,213 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 15:16:27,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 15:16:27,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 15:16:27,216 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 15:16:27,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 03:16:26" (1/3) ... [2024-02-19 15:16:27,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a362910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 03:16:27, skipping insertion in model container [2024-02-19 15:16:27,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:26" (2/3) ... [2024-02-19 15:16:27,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a362910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 03:16:27, skipping insertion in model container [2024-02-19 15:16:27,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 03:16:27" (3/3) ... [2024-02-19 15:16:27,218 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-02-19 15:16:27,231 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 15:16:27,231 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 15:16:27,232 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 15:16:27,263 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-19 15:16:27,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2024-02-19 15:16:27,322 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-02-19 15:16:27,322 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 15:16:27,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-02-19 15:16:27,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2024-02-19 15:16:27,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 66 flow [2024-02-19 15:16:27,342 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 15:16:27,355 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6edb1bb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 15:16:27,356 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 15:16:27,370 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 15:16:27,370 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-02-19 15:16:27,370 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 15:16:27,371 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:27,371 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:27,372 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:27,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:27,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2023735283, now seen corresponding path program 1 times [2024-02-19 15:16:27,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:27,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899848839] [2024-02-19 15:16:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:27,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:27,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899848839] [2024-02-19 15:16:27,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899848839] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:27,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:27,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 15:16:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301734582] [2024-02-19 15:16:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:27,610 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-19 15:16:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:27,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-19 15:16:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-19 15:16:27,638 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-19 15:16:27,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 66 flow. Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:27,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:27,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-19 15:16:27,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:27,721 INFO L124 PetriNetUnfolderBase]: 69/148 cut-off events. [2024-02-19 15:16:27,721 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-19 15:16:27,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 148 events. 69/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 548 event pairs, 50 based on Foata normal form. 10/137 useless extension candidates. Maximal degree in co-relation 250. Up to 124 conditions per place. [2024-02-19 15:16:27,726 INFO L140 encePairwiseOnDemand]: 29/30 looper letters, 18 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2024-02-19 15:16:27,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 100 flow [2024-02-19 15:16:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-19 15:16:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-19 15:16:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-02-19 15:16:27,762 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-02-19 15:16:27,766 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-02-19 15:16:27,766 INFO L507 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 100 flow [2024-02-19 15:16:27,766 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:27,767 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:27,767 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:27,767 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 15:16:27,767 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:27,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:27,769 INFO L85 PathProgramCache]: Analyzing trace with hash -43207966, now seen corresponding path program 1 times [2024-02-19 15:16:27,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:27,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172403613] [2024-02-19 15:16:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:27,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:27,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:27,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172403613] [2024-02-19 15:16:27,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172403613] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:27,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:27,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 15:16:27,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502563132] [2024-02-19 15:16:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:27,967 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 15:16:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 15:16:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 15:16:27,969 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-19 15:16:27,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:27,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:27,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-19 15:16:27,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:28,052 INFO L124 PetriNetUnfolderBase]: 73/172 cut-off events. [2024-02-19 15:16:28,054 INFO L125 PetriNetUnfolderBase]: For 53/105 co-relation queries the response was YES. [2024-02-19 15:16:28,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 172 events. 73/172 cut-off events. For 53/105 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 642 event pairs, 19 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 393. Up to 132 conditions per place. [2024-02-19 15:16:28,056 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-02-19 15:16:28,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 175 flow [2024-02-19 15:16:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 15:16:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 15:16:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-02-19 15:16:28,059 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-02-19 15:16:28,059 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-02-19 15:16:28,060 INFO L507 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 175 flow [2024-02-19 15:16:28,060 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:28,060 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:28,061 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:28,061 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 15:16:28,062 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:28,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:28,063 INFO L85 PathProgramCache]: Analyzing trace with hash 924268772, now seen corresponding path program 2 times [2024-02-19 15:16:28,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:28,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640930214] [2024-02-19 15:16:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:28,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:28,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640930214] [2024-02-19 15:16:28,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640930214] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:28,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:28,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 15:16:28,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197262853] [2024-02-19 15:16:28,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:28,255 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 15:16:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 15:16:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 15:16:28,256 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-19 15:16:28,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:28,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:28,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-19 15:16:28,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:28,333 INFO L124 PetriNetUnfolderBase]: 76/191 cut-off events. [2024-02-19 15:16:28,333 INFO L125 PetriNetUnfolderBase]: For 124/192 co-relation queries the response was YES. [2024-02-19 15:16:28,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 191 events. 76/191 cut-off events. For 124/192 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 745 event pairs, 22 based on Foata normal form. 7/178 useless extension candidates. Maximal degree in co-relation 506. Up to 145 conditions per place. [2024-02-19 15:16:28,337 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 23 selfloop transitions, 2 changer transitions 6/39 dead transitions. [2024-02-19 15:16:28,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 285 flow [2024-02-19 15:16:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 15:16:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 15:16:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-02-19 15:16:28,340 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-02-19 15:16:28,341 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-02-19 15:16:28,341 INFO L507 AbstractCegarLoop]: Abstraction has has 36 places, 39 transitions, 285 flow [2024-02-19 15:16:28,342 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:28,342 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:28,342 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:28,342 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 15:16:28,342 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:28,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1856589078, now seen corresponding path program 1 times [2024-02-19 15:16:28,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:28,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919060123] [2024-02-19 15:16:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:28,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:28,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:28,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919060123] [2024-02-19 15:16:28,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919060123] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:28,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:28,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-19 15:16:28,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549106084] [2024-02-19 15:16:28,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:28,545 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-19 15:16:28,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-19 15:16:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-19 15:16:28,561 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-02-19 15:16:28,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 39 transitions, 285 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:28,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:28,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-02-19 15:16:28,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:28,676 INFO L124 PetriNetUnfolderBase]: 217/463 cut-off events. [2024-02-19 15:16:28,676 INFO L125 PetriNetUnfolderBase]: For 727/727 co-relation queries the response was YES. [2024-02-19 15:16:28,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 463 events. 217/463 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1989 event pairs, 18 based on Foata normal form. 1/462 useless extension candidates. Maximal degree in co-relation 1412. Up to 309 conditions per place. [2024-02-19 15:16:28,679 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 57 selfloop transitions, 9 changer transitions 19/89 dead transitions. [2024-02-19 15:16:28,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 89 transitions, 852 flow [2024-02-19 15:16:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-19 15:16:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-19 15:16:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-02-19 15:16:28,681 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-02-19 15:16:28,681 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-02-19 15:16:28,681 INFO L507 AbstractCegarLoop]: Abstraction has has 43 places, 89 transitions, 852 flow [2024-02-19 15:16:28,681 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:28,681 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:28,682 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:28,682 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 15:16:28,682 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:28,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash -47459102, now seen corresponding path program 1 times [2024-02-19 15:16:28,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:28,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390092235] [2024-02-19 15:16:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:28,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:28,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:28,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390092235] [2024-02-19 15:16:28,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390092235] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:28,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947359425] [2024-02-19 15:16:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:28,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:28,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:28,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:16:28,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 15:16:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:28,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 15:16:28,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:28,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:29,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947359425] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:29,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:29,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-19 15:16:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162565132] [2024-02-19 15:16:29,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:29,012 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:16:29,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:16:29,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:16:29,013 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-19 15:16:29,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 89 transitions, 852 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:29,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:29,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-19 15:16:29,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:29,183 INFO L124 PetriNetUnfolderBase]: 357/790 cut-off events. [2024-02-19 15:16:29,184 INFO L125 PetriNetUnfolderBase]: For 2278/2278 co-relation queries the response was YES. [2024-02-19 15:16:29,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 790 events. 357/790 cut-off events. For 2278/2278 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4092 event pairs, 27 based on Foata normal form. 32/819 useless extension candidates. Maximal degree in co-relation 1654. Up to 518 conditions per place. [2024-02-19 15:16:29,188 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 86 selfloop transitions, 5 changer transitions 38/142 dead transitions. [2024-02-19 15:16:29,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 142 transitions, 1677 flow [2024-02-19 15:16:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-19 15:16:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-19 15:16:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-02-19 15:16:29,189 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-02-19 15:16:29,190 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-02-19 15:16:29,190 INFO L507 AbstractCegarLoop]: Abstraction has has 49 places, 142 transitions, 1677 flow [2024-02-19 15:16:29,190 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:29,190 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:29,190 INFO L234 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] [2024-02-19 15:16:29,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 15:16:29,402 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:29,402 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:29,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:29,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1523659720, now seen corresponding path program 2 times [2024-02-19 15:16:29,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:29,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447241866] [2024-02-19 15:16:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:29,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:29,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447241866] [2024-02-19 15:16:29,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447241866] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220840347] [2024-02-19 15:16:29,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:16:29,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:29,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:29,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:16:29,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 15:16:29,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:16:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:29,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2024-02-19 15:16:29,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:30,098 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 11 treesize of output 3 [2024-02-19 15:16:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:30,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:30,233 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:16:30,234 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 24 treesize of output 11 [2024-02-19 15:16:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:30,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220840347] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:30,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:30,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-02-19 15:16:30,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187203032] [2024-02-19 15:16:30,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:30,393 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 15:16:30,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 15:16:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-02-19 15:16:30,454 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-02-19 15:16:30,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 142 transitions, 1677 flow. Second operand has 22 states, 22 states have (on average 9.409090909090908) internal successors, (207), 22 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:30,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:30,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-02-19 15:16:30,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:32,429 INFO L124 PetriNetUnfolderBase]: 1613/3205 cut-off events. [2024-02-19 15:16:32,430 INFO L125 PetriNetUnfolderBase]: For 12494/12494 co-relation queries the response was YES. [2024-02-19 15:16:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17860 conditions, 3205 events. 1613/3205 cut-off events. For 12494/12494 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 19449 event pairs, 60 based on Foata normal form. 66/3267 useless extension candidates. Maximal degree in co-relation 10216. Up to 2255 conditions per place. [2024-02-19 15:16:32,471 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 431 selfloop transitions, 88 changer transitions 67/594 dead transitions. [2024-02-19 15:16:32,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 594 transitions, 8181 flow [2024-02-19 15:16:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-02-19 15:16:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-02-19 15:16:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 662 transitions. [2024-02-19 15:16:32,476 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5516666666666666 [2024-02-19 15:16:32,477 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-02-19 15:16:32,478 INFO L507 AbstractCegarLoop]: Abstraction has has 88 places, 594 transitions, 8181 flow [2024-02-19 15:16:32,478 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.409090909090908) internal successors, (207), 22 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:32,478 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:32,479 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:32,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 15:16:32,690 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-19 15:16:32,691 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:32,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1676379866, now seen corresponding path program 1 times [2024-02-19 15:16:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:32,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381085511] [2024-02-19 15:16:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:32,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:32,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381085511] [2024-02-19 15:16:32,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381085511] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:32,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683220120] [2024-02-19 15:16:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:32,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:32,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:32,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:16:32,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 15:16:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:32,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-19 15:16:32,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:32,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-19 15:16:32,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683220120] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:32,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-19 15:16:32,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-02-19 15:16:32,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236880233] [2024-02-19 15:16:32,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:32,915 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 15:16:32,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:32,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 15:16:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-19 15:16:32,916 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-19 15:16:32,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 594 transitions, 8181 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:32,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:32,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-19 15:16:32,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:33,491 INFO L124 PetriNetUnfolderBase]: 2129/4217 cut-off events. [2024-02-19 15:16:33,491 INFO L125 PetriNetUnfolderBase]: For 24370/24370 co-relation queries the response was YES. [2024-02-19 15:16:33,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26415 conditions, 4217 events. 2129/4217 cut-off events. For 24370/24370 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 26698 event pairs, 112 based on Foata normal form. 66/4279 useless extension candidates. Maximal degree in co-relation 15469. Up to 2973 conditions per place. [2024-02-19 15:16:33,524 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 529 selfloop transitions, 64 changer transitions 145/776 dead transitions. [2024-02-19 15:16:33,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 776 transitions, 12245 flow [2024-02-19 15:16:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 15:16:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 15:16:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-02-19 15:16:33,525 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-02-19 15:16:33,526 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-02-19 15:16:33,526 INFO L507 AbstractCegarLoop]: Abstraction has has 91 places, 776 transitions, 12245 flow [2024-02-19 15:16:33,526 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:33,526 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:33,527 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:33,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-19 15:16:33,730 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:33,731 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:33,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:33,731 INFO L85 PathProgramCache]: Analyzing trace with hash 476839490, now seen corresponding path program 3 times [2024-02-19 15:16:33,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:33,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330693747] [2024-02-19 15:16:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:33,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:34,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:34,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330693747] [2024-02-19 15:16:34,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330693747] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:34,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324394546] [2024-02-19 15:16:34,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:16:34,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:34,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:34,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:16:34,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 15:16:34,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:16:34,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:34,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 15:16:34,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:16:34,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:34,475 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:16:34,475 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 25 treesize of output 12 [2024-02-19 15:16:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:16:34,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324394546] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:34,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:34,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2024-02-19 15:16:34,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245645770] [2024-02-19 15:16:34,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:34,489 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 15:16:34,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:34,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 15:16:34,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-02-19 15:16:34,514 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-02-19 15:16:34,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 776 transitions, 12245 flow. Second operand has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:34,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:34,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-02-19 15:16:34,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:35,470 INFO L124 PetriNetUnfolderBase]: 2252/4463 cut-off events. [2024-02-19 15:16:35,471 INFO L125 PetriNetUnfolderBase]: For 30075/30075 co-relation queries the response was YES. [2024-02-19 15:16:35,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31571 conditions, 4463 events. 2252/4463 cut-off events. For 30075/30075 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 27898 event pairs, 107 based on Foata normal form. 18/4476 useless extension candidates. Maximal degree in co-relation 19514. Up to 3130 conditions per place. [2024-02-19 15:16:35,504 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 653 selfloop transitions, 54 changer transitions 151/865 dead transitions. [2024-02-19 15:16:35,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 865 transitions, 15348 flow [2024-02-19 15:16:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 15:16:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 15:16:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 172 transitions. [2024-02-19 15:16:35,506 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-02-19 15:16:35,506 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-02-19 15:16:35,507 INFO L507 AbstractCegarLoop]: Abstraction has has 102 places, 865 transitions, 15348 flow [2024-02-19 15:16:35,507 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:35,507 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:35,507 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:35,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 15:16:35,721 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:35,722 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:35,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:35,722 INFO L85 PathProgramCache]: Analyzing trace with hash -595116340, now seen corresponding path program 1 times [2024-02-19 15:16:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:35,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226678137] [2024-02-19 15:16:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:35,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226678137] [2024-02-19 15:16:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226678137] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424984355] [2024-02-19 15:16:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:36,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:16:36,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 15:16:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:36,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 15:16:36,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:36,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:37,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:16:37,190 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 [2024-02-19 15:16:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424984355] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:37,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:37,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-02-19 15:16:37,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445407845] [2024-02-19 15:16:37,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:37,522 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-02-19 15:16:37,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:37,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-02-19 15:16:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2024-02-19 15:16:37,553 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:16:37,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 865 transitions, 15348 flow. Second operand has 41 states, 41 states have (on average 5.902439024390244) internal successors, (242), 41 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:37,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:37,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:16:37,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:42,674 INFO L124 PetriNetUnfolderBase]: 4054/7671 cut-off events. [2024-02-19 15:16:42,675 INFO L125 PetriNetUnfolderBase]: For 63544/63544 co-relation queries the response was YES. [2024-02-19 15:16:42,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59571 conditions, 7671 events. 4054/7671 cut-off events. For 63544/63544 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 51842 event pairs, 107 based on Foata normal form. 8/7674 useless extension candidates. Maximal degree in co-relation 41249. Up to 5134 conditions per place. [2024-02-19 15:16:42,730 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1164 selfloop transitions, 256 changer transitions 289/1711 dead transitions. [2024-02-19 15:16:42,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 1711 transitions, 32505 flow [2024-02-19 15:16:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-02-19 15:16:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-02-19 15:16:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 688 transitions. [2024-02-19 15:16:42,734 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3323671497584541 [2024-02-19 15:16:42,734 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-02-19 15:16:42,734 INFO L507 AbstractCegarLoop]: Abstraction has has 170 places, 1711 transitions, 32505 flow [2024-02-19 15:16:42,735 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.902439024390244) internal successors, (242), 41 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:42,735 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:42,735 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:42,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 15:16:42,946 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:42,947 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:42,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1889617288, now seen corresponding path program 2 times [2024-02-19 15:16:42,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:42,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815042902] [2024-02-19 15:16:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:42,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815042902] [2024-02-19 15:16:43,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815042902] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676965226] [2024-02-19 15:16:43,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:16:43,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:43,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:43,467 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:16:43,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 15:16:43,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:16:43,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:43,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 15:16:43,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:43,813 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 11 treesize of output 3 [2024-02-19 15:16:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:43,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:44,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:16:44,150 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 [2024-02-19 15:16:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:44,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676965226] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:44,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:44,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-02-19 15:16:44,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431994096] [2024-02-19 15:16:44,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:44,411 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-02-19 15:16:44,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-02-19 15:16:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2024-02-19 15:16:44,426 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:16:44,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 1711 transitions, 32505 flow. Second operand has 41 states, 41 states have (on average 5.902439024390244) internal successors, (242), 41 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:44,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:44,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:16:44,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:53,626 INFO L124 PetriNetUnfolderBase]: 6784/12996 cut-off events. [2024-02-19 15:16:53,626 INFO L125 PetriNetUnfolderBase]: For 108638/108638 co-relation queries the response was YES. [2024-02-19 15:16:53,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112593 conditions, 12996 events. 6784/12996 cut-off events. For 108638/108638 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 100504 event pairs, 92 based on Foata normal form. 16/13007 useless extension candidates. Maximal degree in co-relation 88552. Up to 8721 conditions per place. [2024-02-19 15:16:53,734 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 2012 selfloop transitions, 907 changer transitions 627/3548 dead transitions. [2024-02-19 15:16:53,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 3548 transitions, 73640 flow [2024-02-19 15:16:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-02-19 15:16:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2024-02-19 15:16:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 1202 transitions. [2024-02-19 15:16:53,745 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36424242424242426 [2024-02-19 15:16:53,745 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 249 predicate places. [2024-02-19 15:16:53,746 INFO L507 AbstractCegarLoop]: Abstraction has has 279 places, 3548 transitions, 73640 flow [2024-02-19 15:16:53,746 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.902439024390244) internal successors, (242), 41 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:53,746 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:53,746 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:53,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-19 15:16:53,958 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:53,959 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:16:53,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1775457726, now seen corresponding path program 3 times [2024-02-19 15:16:53,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:53,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966630280] [2024-02-19 15:16:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:53,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:54,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:54,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966630280] [2024-02-19 15:16:54,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966630280] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369116098] [2024-02-19 15:16:54,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:16:54,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:54,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:54,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:16:54,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 15:16:54,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 15:16:54,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:54,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 15:16:54,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:54,864 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 11 treesize of output 3 [2024-02-19 15:16:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:55,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:55,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:16:55,224 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 [2024-02-19 15:16:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:55,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369116098] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:55,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:55,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-02-19 15:16:55,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876579371] [2024-02-19 15:16:55,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:55,668 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-02-19 15:16:55,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-02-19 15:16:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2024-02-19 15:16:55,697 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:16:55,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 3548 transitions, 73640 flow. Second operand has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:16:55,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:55,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:16:55,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:17:16,118 INFO L124 PetriNetUnfolderBase]: 11484/22220 cut-off events. [2024-02-19 15:17:16,118 INFO L125 PetriNetUnfolderBase]: For 196257/196257 co-relation queries the response was YES. [2024-02-19 15:17:16,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212447 conditions, 22220 events. 11484/22220 cut-off events. For 196257/196257 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 194460 event pairs, 52 based on Foata normal form. 12/22227 useless extension candidates. Maximal degree in co-relation 182200. Up to 16033 conditions per place. [2024-02-19 15:17:16,315 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 3804 selfloop transitions, 1837 changer transitions 1265/6908 dead transitions. [2024-02-19 15:17:16,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 6908 transitions, 154867 flow [2024-02-19 15:17:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-02-19 15:17:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2024-02-19 15:17:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 1230 transitions. [2024-02-19 15:17:16,318 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33064516129032256 [2024-02-19 15:17:16,319 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 372 predicate places. [2024-02-19 15:17:16,319 INFO L507 AbstractCegarLoop]: Abstraction has has 402 places, 6908 transitions, 154867 flow [2024-02-19 15:17:16,319 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:17:16,320 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:17:16,320 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:17:16,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-19 15:17:16,530 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:17:16,531 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:17:16,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:17:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -35484340, now seen corresponding path program 4 times [2024-02-19 15:17:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:17:16,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051411191] [2024-02-19 15:17:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:17:16,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:17:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:17:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:17:17,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:17:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051411191] [2024-02-19 15:17:17,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051411191] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:17:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217874018] [2024-02-19 15:17:17,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:17:17,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:17:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:17:17,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:17:17,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-19 15:17:17,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:17:17,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:17:17,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 15:17:17,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:17:17,453 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 12 treesize of output 3 [2024-02-19 15:17:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:17:17,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:17:17,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:17:17,850 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 [2024-02-19 15:17:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:17:18,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217874018] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:17:18,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:17:18,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-02-19 15:17:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009281702] [2024-02-19 15:17:18,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:17:18,102 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-02-19 15:17:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:17:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-02-19 15:17:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2024-02-19 15:17:18,157 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:17:18,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 6908 transitions, 154867 flow. Second operand has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:17:18,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:17:18,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:17:18,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:18:06,278 INFO L124 PetriNetUnfolderBase]: 15072/29114 cut-off events. [2024-02-19 15:18:06,279 INFO L125 PetriNetUnfolderBase]: For 267286/267286 co-relation queries the response was YES. [2024-02-19 15:18:06,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306054 conditions, 29114 events. 15072/29114 cut-off events. For 267286/267286 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 263319 event pairs, 138 based on Foata normal form. 30/29139 useless extension candidates. Maximal degree in co-relation 270765. Up to 21449 conditions per place. [2024-02-19 15:18:06,507 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 5601 selfloop transitions, 1841 changer transitions 1866/9310 dead transitions. [2024-02-19 15:18:06,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 9310 transitions, 227399 flow [2024-02-19 15:18:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-02-19 15:18:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2024-02-19 15:18:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 937 transitions. [2024-02-19 15:18:06,509 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33584229390681003 [2024-02-19 15:18:06,510 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 464 predicate places. [2024-02-19 15:18:06,510 INFO L507 AbstractCegarLoop]: Abstraction has has 494 places, 9310 transitions, 227399 flow [2024-02-19 15:18:06,510 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:18:06,510 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:18:06,510 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:18:06,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-19 15:18:06,723 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-19 15:18:06,724 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:18:06,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:18:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash -761123652, now seen corresponding path program 5 times [2024-02-19 15:18:06,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:18:06,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928869918] [2024-02-19 15:18:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:18:06,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:18:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:18:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:18:07,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:18:07,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928869918] [2024-02-19 15:18:07,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928869918] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:18:07,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941461866] [2024-02-19 15:18:07,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:18:07,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:18:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:18:07,427 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:18:07,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-19 15:18:07,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 15:18:07,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:18:07,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 15:18:07,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:18:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:18:07,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:18:07,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:18:07,945 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 [2024-02-19 15:18:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:18:08,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941461866] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:18:08,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:18:08,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-02-19 15:18:08,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914403274] [2024-02-19 15:18:08,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:18:08,028 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-02-19 15:18:08,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:18:08,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-02-19 15:18:08,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2024-02-19 15:18:08,051 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:18:08,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 9310 transitions, 227399 flow. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:18:08,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:18:08,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:18:08,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:19:25,822 INFO L124 PetriNetUnfolderBase]: 15338/29691 cut-off events. [2024-02-19 15:19:25,823 INFO L125 PetriNetUnfolderBase]: For 299545/299545 co-relation queries the response was YES. [2024-02-19 15:19:25,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339058 conditions, 29691 events. 15338/29691 cut-off events. For 299545/299545 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 269687 event pairs, 150 based on Foata normal form. 1/29687 useless extension candidates. Maximal degree in co-relation 296778. Up to 21730 conditions per place. [2024-02-19 15:19:26,112 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 6131 selfloop transitions, 1447 changer transitions 1945/9525 dead transitions. [2024-02-19 15:19:26,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 9525 transitions, 251448 flow [2024-02-19 15:19:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-19 15:19:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-19 15:19:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 301 transitions. [2024-02-19 15:19:26,113 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-02-19 15:19:26,114 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 491 predicate places. [2024-02-19 15:19:26,114 INFO L507 AbstractCegarLoop]: Abstraction has has 521 places, 9525 transitions, 251448 flow [2024-02-19 15:19:26,114 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:19:26,114 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:19:26,115 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:19:26,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-19 15:19:26,325 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-19 15:19:26,326 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:19:26,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:19:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1208021566, now seen corresponding path program 6 times [2024-02-19 15:19:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:19:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198328539] [2024-02-19 15:19:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:19:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:19:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:19:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:19:27,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:19:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198328539] [2024-02-19 15:19:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198328539] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:19:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076717513] [2024-02-19 15:19:27,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 15:19:27,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:19:27,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:19:27,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:19:27,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-19 15:19:27,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 15:19:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:19:27,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 15:19:27,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:19:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:19:27,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:19:27,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:19:27,539 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 [2024-02-19 15:19:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:19:27,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076717513] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:19:27,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:19:27,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 33 [2024-02-19 15:19:27,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544631196] [2024-02-19 15:19:27,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:19:27,620 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-19 15:19:27,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:19:27,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-19 15:19:27,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2024-02-19 15:19:27,651 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:19:27,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 9525 transitions, 251448 flow. Second operand has 34 states, 34 states have (on average 6.0) internal successors, (204), 34 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:19:27,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:19:27,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:19:27,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:20:52,389 INFO L124 PetriNetUnfolderBase]: 15452/29919 cut-off events. [2024-02-19 15:20:52,389 INFO L125 PetriNetUnfolderBase]: For 315210/315210 co-relation queries the response was YES. [2024-02-19 15:20:52,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369968 conditions, 29919 events. 15452/29919 cut-off events. For 315210/315210 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 272166 event pairs, 152 based on Foata normal form. 1/29915 useless extension candidates. Maximal degree in co-relation 323490. Up to 21949 conditions per place. [2024-02-19 15:20:52,674 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 5962 selfloop transitions, 1624 changer transitions 2039/9627 dead transitions. [2024-02-19 15:20:52,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 9627 transitions, 273413 flow [2024-02-19 15:20:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-19 15:20:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-19 15:20:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 324 transitions. [2024-02-19 15:20:52,676 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-02-19 15:20:52,677 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 521 predicate places. [2024-02-19 15:20:52,678 INFO L507 AbstractCegarLoop]: Abstraction has has 551 places, 9627 transitions, 273413 flow [2024-02-19 15:20:52,678 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.0) internal successors, (204), 34 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:20:52,678 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:20:52,678 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:20:52,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-19 15:20:52,890 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-19 15:20:52,890 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:20:52,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:20:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1060051654, now seen corresponding path program 7 times [2024-02-19 15:20:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:20:52,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794082519] [2024-02-19 15:20:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:20:52,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:20:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:20:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:20:53,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:20:53,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794082519] [2024-02-19 15:20:53,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794082519] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:20:53,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5292384] [2024-02-19 15:20:53,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 15:20:53,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:20:53,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:20:53,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:20:53,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-19 15:20:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:20:53,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 15:20:53,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:20:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:20:54,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:20:54,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:20:54,337 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 [2024-02-19 15:20:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:20:54,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5292384] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:20:54,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:20:54,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-02-19 15:20:54,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230004742] [2024-02-19 15:20:54,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:20:54,391 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-02-19 15:20:54,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:20:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-02-19 15:20:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2024-02-19 15:20:54,408 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:20:54,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 9627 transitions, 273413 flow. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:20:54,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:20:54,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:20:54,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:22:16,822 INFO L124 PetriNetUnfolderBase]: 15620/30266 cut-off events. [2024-02-19 15:22:16,822 INFO L125 PetriNetUnfolderBase]: For 342671/342671 co-relation queries the response was YES. [2024-02-19 15:22:16,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402119 conditions, 30266 events. 15620/30266 cut-off events. For 342671/342671 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 275825 event pairs, 150 based on Foata normal form. 1/30262 useless extension candidates. Maximal degree in co-relation 348015. Up to 22142 conditions per place. [2024-02-19 15:22:17,142 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 6111 selfloop transitions, 1543 changer transitions 2111/9767 dead transitions. [2024-02-19 15:22:17,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 9767 transitions, 296756 flow [2024-02-19 15:22:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-19 15:22:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-19 15:22:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 282 transitions. [2024-02-19 15:22:17,144 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2024-02-19 15:22:17,144 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 548 predicate places. [2024-02-19 15:22:17,144 INFO L507 AbstractCegarLoop]: Abstraction has has 578 places, 9767 transitions, 296756 flow [2024-02-19 15:22:17,144 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:22:17,144 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:22:17,144 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:22:17,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-19 15:22:17,356 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-19 15:22:17,356 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:22:17,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:22:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash 283296336, now seen corresponding path program 8 times [2024-02-19 15:22:17,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:22:17,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547579788] [2024-02-19 15:22:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:22:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:22:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:22:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:22:18,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:22:18,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547579788] [2024-02-19 15:22:18,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547579788] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:22:18,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831612988] [2024-02-19 15:22:18,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:22:18,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:22:18,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:22:18,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:22:18,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-19 15:22:18,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:22:18,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:22:18,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 15:22:18,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:22:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:22:18,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:22:18,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:22:18,557 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 [2024-02-19 15:22:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:22:18,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831612988] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:22:18,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:22:18,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-02-19 15:22:18,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478077383] [2024-02-19 15:22:18,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:22:18,639 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-02-19 15:22:18,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:22:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-02-19 15:22:18,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2024-02-19 15:22:18,671 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:22:18,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 9767 transitions, 296756 flow. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:22:18,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:22:18,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:22:18,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:23:56,825 INFO L124 PetriNetUnfolderBase]: 16397/31801 cut-off events. [2024-02-19 15:23:56,825 INFO L125 PetriNetUnfolderBase]: For 387994/387994 co-relation queries the response was YES. [2024-02-19 15:23:56,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452406 conditions, 31801 events. 16397/31801 cut-off events. For 387994/387994 co-relation queries the response was YES. Maximal size of possible extension queue 1224. Compared 292517 event pairs, 150 based on Foata normal form. 1/31797 useless extension candidates. Maximal degree in co-relation 389799. Up to 23403 conditions per place. [2024-02-19 15:23:57,188 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 6290 selfloop transitions, 1991 changer transitions 2238/10521 dead transitions. [2024-02-19 15:23:57,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 10521 transitions, 340712 flow [2024-02-19 15:23:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-19 15:23:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-19 15:23:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 349 transitions. [2024-02-19 15:23:57,190 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32314814814814813 [2024-02-19 15:23:57,191 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 583 predicate places. [2024-02-19 15:23:57,191 INFO L507 AbstractCegarLoop]: Abstraction has has 613 places, 10521 transitions, 340712 flow [2024-02-19 15:23:57,191 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:23:57,191 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:23:57,191 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:23:57,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-02-19 15:23:57,402 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-19 15:23:57,403 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:23:57,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:23:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1815035850, now seen corresponding path program 9 times [2024-02-19 15:23:57,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:23:57,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6565219] [2024-02-19 15:23:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:23:57,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:23:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:23:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 15:23:57,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:23:57,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6565219] [2024-02-19 15:23:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6565219] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:23:57,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042346030] [2024-02-19 15:23:57,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:23:57,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:23:57,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:23:57,564 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:23:57,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-19 15:23:57,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:23:57,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:23:57,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 15:23:57,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:23:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-19 15:23:57,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:23:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-19 15:23:57,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042346030] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:23:57,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:23:57,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-02-19 15:23:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522229523] [2024-02-19 15:23:57,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:23:57,843 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 15:23:57,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:23:57,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 15:23:57,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-02-19 15:23:57,844 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-19 15:23:57,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 10521 transitions, 340712 flow. Second operand has 18 states, 18 states have (on average 12.11111111111111) internal successors, (218), 18 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:23:57,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:23:57,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-19 15:23:57,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:24:13,117 INFO L124 PetriNetUnfolderBase]: 3423/7181 cut-off events. [2024-02-19 15:24:13,117 INFO L125 PetriNetUnfolderBase]: For 112548/112548 co-relation queries the response was YES. [2024-02-19 15:24:13,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103687 conditions, 7181 events. 3423/7181 cut-off events. For 112548/112548 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 57815 event pairs, 28 based on Foata normal form. 548/7724 useless extension candidates. Maximal degree in co-relation 42592. Up to 4406 conditions per place. [2024-02-19 15:24:13,172 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 768 selfloop transitions, 14 changer transitions 1588/2542 dead transitions. [2024-02-19 15:24:13,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 2542 transitions, 84325 flow [2024-02-19 15:24:13,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 15:24:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 15:24:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 225 transitions. [2024-02-19 15:24:13,173 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-02-19 15:24:13,173 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 476 predicate places. [2024-02-19 15:24:13,174 INFO L507 AbstractCegarLoop]: Abstraction has has 506 places, 2542 transitions, 84325 flow [2024-02-19 15:24:13,174 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.11111111111111) internal successors, (218), 18 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:24:13,174 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:24:13,174 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:24:13,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-19 15:24:13,385 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-19 15:24:13,386 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:24:13,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:24:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash 199095002, now seen corresponding path program 10 times [2024-02-19 15:24:13,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:24:13,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057052940] [2024-02-19 15:24:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:24:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:24:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:24:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:24:13,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:24:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057052940] [2024-02-19 15:24:13,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057052940] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:24:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290620973] [2024-02-19 15:24:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:24:13,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:24:13,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:24:13,793 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:24:13,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-19 15:24:13,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:24:13,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:24:13,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-19 15:24:13,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:24:14,246 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:24:14,246 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 23 treesize of output 10 [2024-02-19 15:24:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:24:14,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:24:14,363 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-02-19 15:24:14,364 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 14 [2024-02-19 15:24:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:24:14,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290620973] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:24:14,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:24:14,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-02-19 15:24:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934849743] [2024-02-19 15:24:14,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:24:14,653 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 15:24:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:24:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 15:24:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2024-02-19 15:24:14,689 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-02-19 15:24:14,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 2542 transitions, 84325 flow. Second operand has 31 states, 31 states have (on average 9.290322580645162) internal successors, (288), 31 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:24:14,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:24:14,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-02-19 15:24:14,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:24:25,032 INFO L124 PetriNetUnfolderBase]: 7892/15369 cut-off events. [2024-02-19 15:24:25,033 INFO L125 PetriNetUnfolderBase]: For 264197/264197 co-relation queries the response was YES. [2024-02-19 15:24:25,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236273 conditions, 15369 events. 7892/15369 cut-off events. For 264197/264197 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 120182 event pairs, 248 based on Foata normal form. 368/15732 useless extension candidates. Maximal degree in co-relation 134402. Up to 10051 conditions per place. [2024-02-19 15:24:25,181 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 2340 selfloop transitions, 578 changer transitions 1849/4836 dead transitions. [2024-02-19 15:24:25,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 4836 transitions, 171645 flow [2024-02-19 15:24:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-02-19 15:24:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-02-19 15:24:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 899 transitions. [2024-02-19 15:24:25,183 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5549382716049382 [2024-02-19 15:24:25,184 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 529 predicate places. [2024-02-19 15:24:25,184 INFO L507 AbstractCegarLoop]: Abstraction has has 559 places, 4836 transitions, 171645 flow [2024-02-19 15:24:25,184 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.290322580645162) internal successors, (288), 31 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:24:25,184 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:24:25,185 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:24:25,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-19 15:24:25,395 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:24:25,396 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:24:25,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:24:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1731217574, now seen corresponding path program 11 times [2024-02-19 15:24:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:24:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938978783] [2024-02-19 15:24:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:24:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:24:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:24:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:24:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:24:25,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938978783] [2024-02-19 15:24:25,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938978783] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:24:25,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426274540] [2024-02-19 15:24:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:24:25,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:24:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:24:25,804 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:24:25,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-19 15:24:25,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 15:24:25,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:24:25,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 15:24:25,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:24:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:24:26,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:24:26,225 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-02-19 15:24:26,225 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 14 [2024-02-19 15:24:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:24:26,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426274540] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:24:26,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:24:26,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-02-19 15:24:26,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339158731] [2024-02-19 15:24:26,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:24:26,406 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 15:24:26,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:24:26,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 15:24:26,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2024-02-19 15:24:26,436 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-02-19 15:24:26,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 4836 transitions, 171645 flow. Second operand has 31 states, 31 states have (on average 9.290322580645162) internal successors, (288), 31 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:24:26,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:24:26,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-02-19 15:24:26,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:24:56,016 INFO L124 PetriNetUnfolderBase]: 12918/24512 cut-off events. [2024-02-19 15:24:56,016 INFO L125 PetriNetUnfolderBase]: For 506945/506945 co-relation queries the response was YES. [2024-02-19 15:24:56,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394108 conditions, 24512 events. 12918/24512 cut-off events. For 506945/506945 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 187994 event pairs, 660 based on Foata normal form. 1042/25549 useless extension candidates. Maximal degree in co-relation 277967. Up to 16927 conditions per place. [2024-02-19 15:24:56,334 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 4520 selfloop transitions, 1168 changer transitions 1721/7478 dead transitions. [2024-02-19 15:24:56,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 7478 transitions, 281152 flow [2024-02-19 15:24:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-02-19 15:24:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-02-19 15:24:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 826 transitions. [2024-02-19 15:24:56,336 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5294871794871795 [2024-02-19 15:24:56,336 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 579 predicate places. [2024-02-19 15:24:56,336 INFO L507 AbstractCegarLoop]: Abstraction has has 609 places, 7478 transitions, 281152 flow [2024-02-19 15:24:56,337 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.290322580645162) internal successors, (288), 31 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:24:56,337 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:24:56,337 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:24:56,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-19 15:24:56,548 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:24:56,548 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:24:56,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:24:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1911879482, now seen corresponding path program 12 times [2024-02-19 15:24:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:24:56,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160733440] [2024-02-19 15:24:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:24:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:24:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:24:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:24:56,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:24:56,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160733440] [2024-02-19 15:24:56,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160733440] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:24:56,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216829896] [2024-02-19 15:24:56,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 15:24:56,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:24:56,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:24:56,700 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:24:56,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-19 15:24:56,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 15:24:56,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:24:56,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-19 15:24:56,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:24:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:24:56,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:24:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:24:57,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216829896] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:24:57,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:24:57,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2024-02-19 15:24:57,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523080036] [2024-02-19 15:24:57,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:24:57,062 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-19 15:24:57,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:24:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-19 15:24:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-02-19 15:24:57,063 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-19 15:24:57,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 7478 transitions, 281152 flow. Second operand has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:24:57,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:24:57,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-19 15:24:57,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:25:45,100 INFO L124 PetriNetUnfolderBase]: 12882/24437 cut-off events. [2024-02-19 15:25:45,100 INFO L125 PetriNetUnfolderBase]: For 564008/564008 co-relation queries the response was YES. [2024-02-19 15:25:45,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408057 conditions, 24437 events. 12882/24437 cut-off events. For 564008/564008 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 187237 event pairs, 660 based on Foata normal form. 6/24438 useless extension candidates. Maximal degree in co-relation 288700. Up to 16865 conditions per place. [2024-02-19 15:25:45,410 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 4739 selfloop transitions, 8 changer transitions 1796/7463 dead transitions. [2024-02-19 15:25:45,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 7463 transitions, 292871 flow [2024-02-19 15:25:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 15:25:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 15:25:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-02-19 15:25:45,412 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-02-19 15:25:45,412 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 588 predicate places. [2024-02-19 15:25:45,412 INFO L507 AbstractCegarLoop]: Abstraction has has 618 places, 7463 transitions, 292871 flow [2024-02-19 15:25:45,412 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:25:45,412 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:25:45,412 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:25:45,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-02-19 15:25:45,624 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:25:45,624 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:25:45,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:25:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1924697452, now seen corresponding path program 13 times [2024-02-19 15:25:45,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:25:45,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944150890] [2024-02-19 15:25:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:25:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:25:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:25:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:25:46,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:25:46,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944150890] [2024-02-19 15:25:46,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944150890] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:25:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252542773] [2024-02-19 15:25:46,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 15:25:46,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:25:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:25:46,150 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:25:46,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-19 15:25:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:25:46,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-19 15:25:46,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:25:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:25:46,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:25:46,460 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-02-19 15:25:46,461 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 14 [2024-02-19 15:25:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 15:25:46,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252542773] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:25:46,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:25:46,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 21 [2024-02-19 15:25:46,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587038265] [2024-02-19 15:25:46,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:25:46,476 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 15:25:46,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:25:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 15:25:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2024-02-19 15:25:46,509 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-02-19 15:25:46,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 7463 transitions, 292871 flow. Second operand has 22 states, 22 states have (on average 9.772727272727273) internal successors, (215), 22 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:25:46,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:25:46,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-02-19 15:25:46,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:26:56,920 INFO L124 PetriNetUnfolderBase]: 16239/30786 cut-off events. [2024-02-19 15:26:56,921 INFO L125 PetriNetUnfolderBase]: For 865949/865949 co-relation queries the response was YES. [2024-02-19 15:26:56,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535331 conditions, 30786 events. 16239/30786 cut-off events. For 865949/865949 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 244461 event pairs, 901 based on Foata normal form. 122/30902 useless extension candidates. Maximal degree in co-relation 400696. Up to 21159 conditions per place. [2024-02-19 15:26:57,360 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 6261 selfloop transitions, 1345 changer transitions 1827/9498 dead transitions. [2024-02-19 15:26:57,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 9498 transitions, 393421 flow [2024-02-19 15:26:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-19 15:26:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-19 15:26:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 384 transitions. [2024-02-19 15:26:57,362 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-02-19 15:26:57,362 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 613 predicate places. [2024-02-19 15:26:57,362 INFO L507 AbstractCegarLoop]: Abstraction has has 643 places, 9498 transitions, 393421 flow [2024-02-19 15:26:57,362 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.772727272727273) internal successors, (215), 22 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:26:57,362 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:26:57,362 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-02-19 15:26:57,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-19 15:26:57,574 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:26:57,574 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:26:57,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:26:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash 259295360, now seen corresponding path program 14 times [2024-02-19 15:26:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:26:57,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797809661] [2024-02-19 15:26:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:26:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:26:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:26:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:26:57,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:26:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797809661] [2024-02-19 15:26:57,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797809661] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:26:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694050792] [2024-02-19 15:26:57,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:26:57,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:26:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:26:57,625 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:26:57,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-19 15:26:57,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:26:57,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:26:57,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 15:26:57,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:26:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:26:57,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:26:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:26:57,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694050792] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:26:57,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:26:57,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-02-19 15:26:57,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425563130] [2024-02-19 15:26:57,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:26:57,849 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-19 15:26:57,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:26:57,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-19 15:26:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-02-19 15:26:57,850 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-19 15:26:57,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 9498 transitions, 393421 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:26:57,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:26:57,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-19 15:26:57,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:28:29,455 INFO L124 PetriNetUnfolderBase]: 17914/33872 cut-off events. [2024-02-19 15:28:29,456 INFO L125 PetriNetUnfolderBase]: For 1096354/1096354 co-relation queries the response was YES. [2024-02-19 15:28:29,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610640 conditions, 33872 events. 17914/33872 cut-off events. For 1096354/1096354 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 273360 event pairs, 977 based on Foata normal form. 58/33924 useless extension candidates. Maximal degree in co-relation 417554. Up to 23318 conditions per place. [2024-02-19 15:28:29,966 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 6468 selfloop transitions, 752 changer transitions 1939/10294 dead transitions. [2024-02-19 15:28:29,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 10294 transitions, 446058 flow [2024-02-19 15:28:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 15:28:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 15:28:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-02-19 15:28:29,967 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-02-19 15:28:29,967 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 617 predicate places. [2024-02-19 15:28:29,967 INFO L507 AbstractCegarLoop]: Abstraction has has 647 places, 10294 transitions, 446058 flow [2024-02-19 15:28:29,968 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:28:29,968 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:28:29,968 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:28:29,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-19 15:28:30,173 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:28:30,173 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:28:30,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:28:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1125902740, now seen corresponding path program 15 times [2024-02-19 15:28:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:28:30,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607089692] [2024-02-19 15:28:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:28:30,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:28:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:28:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:28:31,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:28:31,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607089692] [2024-02-19 15:28:31,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607089692] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:28:31,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066011789] [2024-02-19 15:28:31,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:28:31,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:28:31,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:28:31,247 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:28:31,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-19 15:28:31,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 15:28:31,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:28:31,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2024-02-19 15:28:31,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:28:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:28:32,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:28:32,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:28:32,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2024-02-19 15:28:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:28:33,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066011789] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:28:33,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:28:33,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 56 [2024-02-19 15:28:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067373868] [2024-02-19 15:28:33,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:28:33,007 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-02-19 15:28:33,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:28:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-02-19 15:28:33,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2933, Unknown=0, NotChecked=0, Total=3192 [2024-02-19 15:28:33,050 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-19 15:28:33,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 10294 transitions, 446058 flow. Second operand has 57 states, 57 states have (on average 5.7368421052631575) internal successors, (327), 57 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:28:33,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:28:33,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-19 15:28:33,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15