./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 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-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-448d4d7-m [2024-02-20 12:35:53,363 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:35:53,465 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:35:53,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:35:53,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:35:53,508 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:35:53,509 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:35:53,509 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:35:53,510 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:35:53,515 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:35:53,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:35:53,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:35:53,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:35:53,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:35:53,518 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:35:53,518 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:35:53,519 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:35:53,520 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:35:53,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:35:53,520 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:35:53,521 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:35:53,521 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:35:53,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:35:53,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:35:53,525 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:35:53,525 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:35:53,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:35:53,525 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:35:53,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:35:53,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:35:53,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:35:53,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:35:53,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:35:53,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:35:53,528 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:35:53,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:35:53,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:35:53,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:35:53,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:35:53,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:35:53,532 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:35:53,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:35:53,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:35:53,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:35:53,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:35:53,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:35:53,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:35:53,991 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:35:53,992 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:35:53,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-02-20 12:35:55,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:35:55,880 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:35:55,882 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-02-20 12:35:55,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648ec1e0c/82c9ba7b244a46cca0343a8b3bf3e9c7/FLAG6e2739028 [2024-02-20 12:35:55,939 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648ec1e0c/82c9ba7b244a46cca0343a8b3bf3e9c7 [2024-02-20 12:35:55,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:35:55,958 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:35:55,961 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:35:55,961 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:35:55,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:35:55,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:35:55" (1/1) ... [2024-02-20 12:35:55,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71db0b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:55, skipping insertion in model container [2024-02-20 12:35:55,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:35:55" (1/1) ... [2024-02-20 12:35:56,007 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:35:56,255 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] [2024-02-20 12:35:56,282 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:35:56,300 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:35:56,342 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] [2024-02-20 12:35:56,348 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:35:56,372 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:35:56,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56 WrapperNode [2024-02-20 12:35:56,378 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:35:56,379 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:35:56,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:35:56,380 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:35:56,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,421 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,454 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2024-02-20 12:35:56,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:35:56,462 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:35:56,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:35:56,462 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:35:56,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,493 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,507 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]. [2024-02-20 12:35:56,521 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,522 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,539 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,573 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,577 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:35:56,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:35:56,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:35:56,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:35:56,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (1/1) ... [2024-02-20 12:35:56,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:35:56,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:35:56,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 12:35:56,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 12:35:56,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:35:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:35:56,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:35:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:35:56,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:35:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:35:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:35:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:35:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 12:35:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:35:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:35:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:35:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:35:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 12:35:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:35:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:35:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-20 12:35:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:35:56,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:35:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:35:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:35:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:35:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 12:35:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:35:56,733 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:35:56,911 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:35:56,913 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:35:57,415 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:35:57,416 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:35:57,715 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:35:57,715 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-20 12:35:57,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:35:57 BoogieIcfgContainer [2024-02-20 12:35:57,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:35:57,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:35:57,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:35:57,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:35:57,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:35:55" (1/3) ... [2024-02-20 12:35:57,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d517a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:35:57, skipping insertion in model container [2024-02-20 12:35:57,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:35:56" (2/3) ... [2024-02-20 12:35:57,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d517a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:35:57, skipping insertion in model container [2024-02-20 12:35:57,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:35:57" (3/3) ... [2024-02-20 12:35:57,731 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-02-20 12:35:57,758 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:35:57,772 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:35:57,772 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:35:57,827 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 12:35:57,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2024-02-20 12:35:57,964 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-02-20 12:35:57,964 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:35:57,968 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. [2024-02-20 12:35:57,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2024-02-20 12:35:57,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 66 flow [2024-02-20 12:35:57,983 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:35:58,009 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;@3dbc9ccf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:35:58,009 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 12:35:58,020 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:35:58,020 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-02-20 12:35:58,020 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:35:58,020 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:58,021 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:35:58,021 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:35:58,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:58,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2023735283, now seen corresponding path program 1 times [2024-02-20 12:35:58,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:58,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956847701] [2024-02-20 12:35:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:58,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:58,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956847701] [2024-02-20 12:35:58,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956847701] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:35:58,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:35:58,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:35:58,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454704787] [2024-02-20 12:35:58,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:35:58,415 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-20 12:35:58,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-20 12:35:58,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-20 12:35:58,481 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-20 12:35:58,483 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) [2024-02-20 12:35:58,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:58,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-20 12:35:58,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:58,620 INFO L124 PetriNetUnfolderBase]: 69/148 cut-off events. [2024-02-20 12:35:58,620 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 12:35:58,622 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. [2024-02-20 12:35:58,625 INFO L140 encePairwiseOnDemand]: 29/30 looper letters, 18 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2024-02-20 12:35:58,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 100 flow [2024-02-20 12:35:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-20 12:35:58,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-20 12:35:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-02-20 12:35:58,656 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-02-20 12:35:58,659 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-02-20 12:35:58,660 INFO L507 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 100 flow [2024-02-20 12:35:58,661 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) [2024-02-20 12:35:58,661 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:58,661 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] [2024-02-20 12:35:58,661 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:35:58,662 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:35:58,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:58,662 INFO L85 PathProgramCache]: Analyzing trace with hash -43207966, now seen corresponding path program 1 times [2024-02-20 12:35:58,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:58,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836337496] [2024-02-20 12:35:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:58,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:58,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:58,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836337496] [2024-02-20 12:35:58,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836337496] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:35:58,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:35:58,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:35:58,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096935097] [2024-02-20 12:35:58,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:35:58,968 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:35:58,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:58,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:35:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:35:58,981 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-20 12:35:58,982 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) [2024-02-20 12:35:58,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:58,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-20 12:35:58,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:59,091 INFO L124 PetriNetUnfolderBase]: 73/172 cut-off events. [2024-02-20 12:35:59,091 INFO L125 PetriNetUnfolderBase]: For 53/105 co-relation queries the response was YES. [2024-02-20 12:35:59,092 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. [2024-02-20 12:35:59,107 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-02-20 12:35:59,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 175 flow [2024-02-20 12:35:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:35:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:35:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-02-20 12:35:59,109 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-02-20 12:35:59,110 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-02-20 12:35:59,110 INFO L507 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 175 flow [2024-02-20 12:35:59,110 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) [2024-02-20 12:35:59,110 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:59,110 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] [2024-02-20 12:35:59,110 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:35:59,111 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:35:59,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 924268772, now seen corresponding path program 2 times [2024-02-20 12:35:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:59,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727857483] [2024-02-20 12:35:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:59,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:59,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:59,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727857483] [2024-02-20 12:35:59,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727857483] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:35:59,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:35:59,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:35:59,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71648756] [2024-02-20 12:35:59,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:35:59,380 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:35:59,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:59,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:35:59,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:35:59,382 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-20 12:35:59,382 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) [2024-02-20 12:35:59,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:59,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-20 12:35:59,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:59,488 INFO L124 PetriNetUnfolderBase]: 76/191 cut-off events. [2024-02-20 12:35:59,489 INFO L125 PetriNetUnfolderBase]: For 124/192 co-relation queries the response was YES. [2024-02-20 12:35:59,492 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. [2024-02-20 12:35:59,510 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 23 selfloop transitions, 2 changer transitions 6/39 dead transitions. [2024-02-20 12:35:59,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 285 flow [2024-02-20 12:35:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:35:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:35:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-02-20 12:35:59,513 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-02-20 12:35:59,514 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-02-20 12:35:59,514 INFO L507 AbstractCegarLoop]: Abstraction has has 36 places, 39 transitions, 285 flow [2024-02-20 12:35:59,515 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) [2024-02-20 12:35:59,515 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:59,515 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] [2024-02-20 12:35:59,515 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 12:35:59,515 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:35:59,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1856589078, now seen corresponding path program 1 times [2024-02-20 12:35:59,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:59,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855008675] [2024-02-20 12:35:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:59,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:35:59,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855008675] [2024-02-20 12:35:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855008675] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:35:59,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:35:59,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-20 12:35:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880618393] [2024-02-20 12:35:59,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:35:59,828 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 12:35:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 12:35:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-20 12:35:59,872 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-02-20 12:35:59,873 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) [2024-02-20 12:35:59,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:59,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-02-20 12:35:59,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:00,114 INFO L124 PetriNetUnfolderBase]: 217/463 cut-off events. [2024-02-20 12:36:00,115 INFO L125 PetriNetUnfolderBase]: For 727/727 co-relation queries the response was YES. [2024-02-20 12:36:00,116 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. [2024-02-20 12:36:00,119 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 57 selfloop transitions, 9 changer transitions 19/89 dead transitions. [2024-02-20 12:36:00,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 89 transitions, 852 flow [2024-02-20 12:36:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-20 12:36:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-20 12:36:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-02-20 12:36:00,123 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-02-20 12:36:00,125 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-02-20 12:36:00,140 INFO L507 AbstractCegarLoop]: Abstraction has has 43 places, 89 transitions, 852 flow [2024-02-20 12:36:00,140 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) [2024-02-20 12:36:00,140 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:00,141 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] [2024-02-20 12:36:00,141 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 12:36:00,142 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:36:00,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash -47459102, now seen corresponding path program 1 times [2024-02-20 12:36:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:00,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667595671] [2024-02-20 12:36:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667595671] [2024-02-20 12:36:00,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667595671] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998494321] [2024-02-20 12:36:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:00,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:00,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:00,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:00,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:36:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:00,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:36:00,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:00,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:00,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998494321] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:00,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:00,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-20 12:36:00,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874294550] [2024-02-20 12:36:00,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:00,806 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:36:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:36:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:36:00,807 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-20 12:36:00,808 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) [2024-02-20 12:36:00,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:00,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-20 12:36:00,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:01,123 INFO L124 PetriNetUnfolderBase]: 357/790 cut-off events. [2024-02-20 12:36:01,124 INFO L125 PetriNetUnfolderBase]: For 2278/2278 co-relation queries the response was YES. [2024-02-20 12:36:01,125 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. [2024-02-20 12:36:01,137 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 86 selfloop transitions, 5 changer transitions 38/142 dead transitions. [2024-02-20 12:36:01,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 142 transitions, 1677 flow [2024-02-20 12:36:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 12:36:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 12:36:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-02-20 12:36:01,139 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-02-20 12:36:01,142 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-02-20 12:36:01,142 INFO L507 AbstractCegarLoop]: Abstraction has has 49 places, 142 transitions, 1677 flow [2024-02-20 12:36:01,142 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) [2024-02-20 12:36:01,142 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:01,142 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] [2024-02-20 12:36:01,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:01,356 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 [2024-02-20 12:36:01,357 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:36:01,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1523659720, now seen corresponding path program 2 times [2024-02-20 12:36:01,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:01,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514958898] [2024-02-20 12:36:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:01,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:02,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514958898] [2024-02-20 12:36:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514958898] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:02,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975822543] [2024-02-20 12:36:02,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:36:02,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:02,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:02,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:02,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:36:02,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:36:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:36:02,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 12:36:02,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:02,555 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 [2024-02-20 12:36:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:02,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:02,768 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 12:36:02,769 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 [2024-02-20 12:36:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:03,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975822543] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:03,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:03,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-02-20 12:36:03,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294549795] [2024-02-20 12:36:03,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:03,060 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 12:36:03,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 12:36:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-02-20 12:36:03,108 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-02-20 12:36:03,109 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) [2024-02-20 12:36:03,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:03,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-02-20 12:36:03,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:05,491 INFO L124 PetriNetUnfolderBase]: 1487/2945 cut-off events. [2024-02-20 12:36:05,492 INFO L125 PetriNetUnfolderBase]: For 10907/10907 co-relation queries the response was YES. [2024-02-20 12:36:05,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16256 conditions, 2945 events. 1487/2945 cut-off events. For 10907/10907 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 18052 event pairs, 20 based on Foata normal form. 78/3019 useless extension candidates. Maximal degree in co-relation 9592. Up to 2037 conditions per place. [2024-02-20 12:36:05,550 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 400 selfloop transitions, 87 changer transitions 54/549 dead transitions. [2024-02-20 12:36:05,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 549 transitions, 7532 flow [2024-02-20 12:36:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-20 12:36:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-20 12:36:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 557 transitions. [2024-02-20 12:36:05,553 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.546078431372549 [2024-02-20 12:36:05,555 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-02-20 12:36:05,555 INFO L507 AbstractCegarLoop]: Abstraction has has 82 places, 549 transitions, 7532 flow [2024-02-20 12:36:05,556 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) [2024-02-20 12:36:05,556 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:05,556 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] [2024-02-20 12:36:05,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:05,768 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 [2024-02-20 12:36:05,769 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:36:05,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1378737016, now seen corresponding path program 3 times [2024-02-20 12:36:05,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:05,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148343199] [2024-02-20 12:36:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:05,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:06,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:06,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148343199] [2024-02-20 12:36:06,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148343199] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:06,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973701048] [2024-02-20 12:36:06,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:36:06,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:06,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:06,493 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:06,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:36:06,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:36:06,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:36:06,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 12:36:06,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:06,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:07,022 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 12:36:07,023 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 [2024-02-20 12:36:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:07,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973701048] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:07,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:07,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-02-20 12:36:07,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629405583] [2024-02-20 12:36:07,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:07,265 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 12:36:07,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 12:36:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-02-20 12:36:07,306 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-02-20 12:36:07,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 549 transitions, 7532 flow. Second operand has 22 states, 22 states have (on average 9.545454545454545) internal successors, (210), 22 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:36:07,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:07,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-02-20 12:36:07,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:09,715 INFO L124 PetriNetUnfolderBase]: 2158/4151 cut-off events. [2024-02-20 12:36:09,715 INFO L125 PetriNetUnfolderBase]: For 19339/19339 co-relation queries the response was YES. [2024-02-20 12:36:09,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25834 conditions, 4151 events. 2158/4151 cut-off events. For 19339/19339 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 24903 event pairs, 74 based on Foata normal form. 60/4207 useless extension candidates. Maximal degree in co-relation 17559. Up to 2800 conditions per place. [2024-02-20 12:36:09,809 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 610 selfloop transitions, 90 changer transitions 54/762 dead transitions. [2024-02-20 12:36:09,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 762 transitions, 11906 flow [2024-02-20 12:36:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 12:36:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 12:36:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 416 transitions. [2024-02-20 12:36:09,812 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-02-20 12:36:09,813 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-02-20 12:36:09,813 INFO L507 AbstractCegarLoop]: Abstraction has has 107 places, 762 transitions, 11906 flow [2024-02-20 12:36:09,813 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.545454545454545) internal successors, (210), 22 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:36:09,814 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:09,814 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] [2024-02-20 12:36:09,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:10,027 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 [2024-02-20 12:36:10,027 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:36:10,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2059921456, now seen corresponding path program 1 times [2024-02-20 12:36:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:10,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230723133] [2024-02-20 12:36:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:10,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:10,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:10,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230723133] [2024-02-20 12:36:10,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230723133] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:10,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013548866] [2024-02-20 12:36:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:10,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:10,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:10,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:10,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:36:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:10,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-20 12:36:10,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:36:10,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:36:10,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013548866] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:36:10,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-20 12:36:10,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-02-20 12:36:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861683319] [2024-02-20 12:36:10,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:36:10,410 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:36:10,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:36:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-20 12:36:10,424 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-02-20 12:36:10,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 762 transitions, 11906 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) [2024-02-20 12:36:10,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:10,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-02-20 12:36:10,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:11,887 INFO L124 PetriNetUnfolderBase]: 2351/4529 cut-off events. [2024-02-20 12:36:11,887 INFO L125 PetriNetUnfolderBase]: For 28776/28776 co-relation queries the response was YES. [2024-02-20 12:36:11,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31301 conditions, 4529 events. 2351/4529 cut-off events. For 28776/28776 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 27840 event pairs, 94 based on Foata normal form. 36/4561 useless extension candidates. Maximal degree in co-relation 19915. Up to 3063 conditions per place. [2024-02-20 12:36:11,983 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 584 selfloop transitions, 42 changer transitions 147/829 dead transitions. [2024-02-20 12:36:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 829 transitions, 14526 flow [2024-02-20 12:36:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:36:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:36:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-02-20 12:36:11,984 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-02-20 12:36:11,987 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-02-20 12:36:11,988 INFO L507 AbstractCegarLoop]: Abstraction has has 110 places, 829 transitions, 14526 flow [2024-02-20 12:36:11,988 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) [2024-02-20 12:36:11,988 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:11,988 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] [2024-02-20 12:36:12,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:12,201 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 [2024-02-20 12:36:12,201 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:36:12,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash -751763434, now seen corresponding path program 4 times [2024-02-20 12:36:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:12,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208956266] [2024-02-20 12:36:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:12,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:13,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208956266] [2024-02-20 12:36:13,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208956266] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130974023] [2024-02-20 12:36:13,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:36:13,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:13,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:13,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:13,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:36:13,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:36:13,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:36:13,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-20 12:36:13,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:36:13,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:13,642 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 12:36:13,642 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 [2024-02-20 12:36:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:36:13,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130974023] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:13,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:13,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 16 [2024-02-20 12:36:13,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245487900] [2024-02-20 12:36:13,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:13,667 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 12:36:13,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 12:36:13,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-02-20 12:36:13,719 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-02-20 12:36:13,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 829 transitions, 14526 flow. Second operand has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 17 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:36:13,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:13,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-02-20 12:36:13,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:16,153 INFO L124 PetriNetUnfolderBase]: 2913/5607 cut-off events. [2024-02-20 12:36:16,153 INFO L125 PetriNetUnfolderBase]: For 45098/45098 co-relation queries the response was YES. [2024-02-20 12:36:16,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43142 conditions, 5607 events. 2913/5607 cut-off events. For 45098/45098 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 36053 event pairs, 179 based on Foata normal form. 12/5614 useless extension candidates. Maximal degree in co-relation 26724. Up to 3773 conditions per place. [2024-02-20 12:36:16,263 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 903 selfloop transitions, 79 changer transitions 153/1142 dead transitions. [2024-02-20 12:36:16,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 1142 transitions, 22266 flow [2024-02-20 12:36:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 12:36:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 12:36:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 190 transitions. [2024-02-20 12:36:16,265 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-02-20 12:36:16,266 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-02-20 12:36:16,266 INFO L507 AbstractCegarLoop]: Abstraction has has 122 places, 1142 transitions, 22266 flow [2024-02-20 12:36:16,267 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 17 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:36:16,267 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:16,267 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] [2024-02-20 12:36:16,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:16,479 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 [2024-02-20 12:36:16,480 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:36:16,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -595116340, now seen corresponding path program 1 times [2024-02-20 12:36:16,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:16,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817680713] [2024-02-20 12:36:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:17,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:17,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817680713] [2024-02-20 12:36:17,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817680713] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:17,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235996502] [2024-02-20 12:36:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:17,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:17,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:17,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:17,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:36:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:17,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2024-02-20 12:36:17,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:18,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:18,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:36:18,873 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 [2024-02-20 12:36:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235996502] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:19,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-02-20 12:36:19,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423195493] [2024-02-20 12:36:19,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:19,312 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-02-20 12:36:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-02-20 12:36:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2024-02-20 12:36:19,353 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-20 12:36:19,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 1142 transitions, 22266 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) [2024-02-20 12:36:19,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:19,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-20 12:36:19,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:27,125 INFO L124 PetriNetUnfolderBase]: 4532/8454 cut-off events. [2024-02-20 12:36:27,126 INFO L125 PetriNetUnfolderBase]: For 85147/85147 co-relation queries the response was YES. [2024-02-20 12:36:27,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70809 conditions, 8454 events. 4532/8454 cut-off events. For 85147/85147 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 57397 event pairs, 173 based on Foata normal form. 4/8453 useless extension candidates. Maximal degree in co-relation 46182. Up to 5424 conditions per place. [2024-02-20 12:36:27,348 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1333 selfloop transitions, 308 changer transitions 244/1887 dead transitions. [2024-02-20 12:36:27,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 1887 transitions, 39258 flow [2024-02-20 12:36:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-02-20 12:36:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-02-20 12:36:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 606 transitions. [2024-02-20 12:36:27,368 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3423728813559322 [2024-02-20 12:36:27,369 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-02-20 12:36:27,369 INFO L507 AbstractCegarLoop]: Abstraction has has 180 places, 1887 transitions, 39258 flow [2024-02-20 12:36:27,371 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) [2024-02-20 12:36:27,371 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:27,372 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] [2024-02-20 12:36:27,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:27,572 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 [2024-02-20 12:36:27,572 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:36:27,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1999982268, now seen corresponding path program 2 times [2024-02-20 12:36:27,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:27,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184773062] [2024-02-20 12:36:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:27,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:28,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:28,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184773062] [2024-02-20 12:36:28,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184773062] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:28,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93291242] [2024-02-20 12:36:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:36:28,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:28,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:28,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:28,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:36:28,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:36:28,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:36:28,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2024-02-20 12:36:28,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:29,123 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 [2024-02-20 12:36:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:29,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:29,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:36:29,674 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 [2024-02-20 12:36:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:30,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93291242] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:30,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:30,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-02-20 12:36:30,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921171886] [2024-02-20 12:36:30,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:30,086 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-02-20 12:36:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-02-20 12:36:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2024-02-20 12:36:30,117 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-20 12:36:30,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 1887 transitions, 39258 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) [2024-02-20 12:36:30,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:30,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-20 12:36:30,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:36:47,212 INFO L124 PetriNetUnfolderBase]: 8822/16513 cut-off events. [2024-02-20 12:36:47,212 INFO L125 PetriNetUnfolderBase]: For 167748/167748 co-relation queries the response was YES. [2024-02-20 12:36:47,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153131 conditions, 16513 events. 8822/16513 cut-off events. For 167748/167748 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 129094 event pairs, 64 based on Foata normal form. 8/16516 useless extension candidates. Maximal degree in co-relation 119166. Up to 10809 conditions per place. [2024-02-20 12:36:47,593 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 2723 selfloop transitions, 1641 changer transitions 511/4877 dead transitions. [2024-02-20 12:36:47,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 4877 transitions, 109035 flow [2024-02-20 12:36:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-02-20 12:36:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2024-02-20 12:36:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 1230 transitions. [2024-02-20 12:36:47,605 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2024-02-20 12:36:47,605 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-02-20 12:36:47,605 INFO L507 AbstractCegarLoop]: Abstraction has has 305 places, 4877 transitions, 109035 flow [2024-02-20 12:36:47,607 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) [2024-02-20 12:36:47,607 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:36:47,607 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] [2024-02-20 12:36:47,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 12:36:47,819 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 [2024-02-20 12:36:47,820 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:36:47,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:36:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1889617288, now seen corresponding path program 3 times [2024-02-20 12:36:47,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:36:47,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716889611] [2024-02-20 12:36:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:36:47,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:36:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:36:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:48,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:36:48,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716889611] [2024-02-20 12:36:48,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716889611] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:36:48,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377697831] [2024-02-20 12:36:48,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:36:48,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:36:48,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:36:48,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:36:48,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 12:36:49,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:36:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:36:49,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:36:49,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:36:49,495 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 [2024-02-20 12:36:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:49,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:36:50,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:36:50,031 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 [2024-02-20 12:36:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:36:50,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377697831] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:36:50,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:36:50,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-02-20 12:36:50,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425761923] [2024-02-20 12:36:50,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:36:50,445 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-02-20 12:36:50,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:36:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-02-20 12:36:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2024-02-20 12:36:50,485 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-20 12:36:50,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 4877 transitions, 109035 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) [2024-02-20 12:36:50,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:36:50,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-20 12:36:50,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:37:38,671 INFO L124 PetriNetUnfolderBase]: 19627/36596 cut-off events. [2024-02-20 12:37:38,671 INFO L125 PetriNetUnfolderBase]: For 392510/392510 co-relation queries the response was YES. [2024-02-20 12:37:38,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374048 conditions, 36596 events. 19627/36596 cut-off events. For 392510/392510 co-relation queries the response was YES. Maximal size of possible extension queue 1323. Compared 328934 event pairs, 122 based on Foata normal form. 217/36808 useless extension candidates. Maximal degree in co-relation 316980. Up to 26333 conditions per place. [2024-02-20 12:37:39,304 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 6836 selfloop transitions, 3542 changer transitions 1469/11849 dead transitions. [2024-02-20 12:37:39,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 11849 transitions, 285683 flow [2024-02-20 12:37:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-02-20 12:37:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2024-02-20 12:37:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 1341 transitions. [2024-02-20 12:37:39,314 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3694214876033058 [2024-02-20 12:37:39,314 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 395 predicate places. [2024-02-20 12:37:39,315 INFO L507 AbstractCegarLoop]: Abstraction has has 425 places, 11849 transitions, 285683 flow [2024-02-20 12:37:39,315 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) [2024-02-20 12:37:39,315 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:37:39,315 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] [2024-02-20 12:37:39,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-20 12:37:39,528 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 [2024-02-20 12:37:39,529 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:37:39,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:37:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2093800084, now seen corresponding path program 4 times [2024-02-20 12:37:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:37:39,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829910074] [2024-02-20 12:37:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:37:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:37:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:37:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:40,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:37:40,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829910074] [2024-02-20 12:37:40,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829910074] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:37:40,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650877330] [2024-02-20 12:37:40,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:37:40,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:37:40,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:37:40,742 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) [2024-02-20 12:37:40,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 12:37:40,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:37:40,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:37:40,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-20 12:37:40,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:37:41,225 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 [2024-02-20 12:37:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:41,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:37:41,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:37:41,843 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 [2024-02-20 12:37:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:42,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650877330] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:37:42,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:37:42,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-02-20 12:37:42,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93769596] [2024-02-20 12:37:42,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:37:42,324 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-02-20 12:37:42,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:37:42,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-02-20 12:37:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2024-02-20 12:37:42,344 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-20 12:37:42,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 11849 transitions, 285683 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) [2024-02-20 12:37:42,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:37:42,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-20 12:37:42,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:40:39,717 INFO L124 PetriNetUnfolderBase]: 23555/44225 cut-off events. [2024-02-20 12:40:39,718 INFO L125 PetriNetUnfolderBase]: For 502526/502526 co-relation queries the response was YES. [2024-02-20 12:40:39,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490896 conditions, 44225 events. 23555/44225 cut-off events. For 502526/502526 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 411979 event pairs, 158 based on Foata normal form. 10/44230 useless extension candidates. Maximal degree in co-relation 426115. Up to 32031 conditions per place. [2024-02-20 12:40:40,231 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 9568 selfloop transitions, 3399 changer transitions 1801/14770 dead transitions. [2024-02-20 12:40:40,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 14770 transitions, 385905 flow [2024-02-20 12:40:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-02-20 12:40:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2024-02-20 12:40:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 870 transitions. [2024-02-20 12:40:40,236 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2024-02-20 12:40:40,237 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 484 predicate places. [2024-02-20 12:40:40,237 INFO L507 AbstractCegarLoop]: Abstraction has has 514 places, 14770 transitions, 385905 flow [2024-02-20 12:40:40,237 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) [2024-02-20 12:40:40,237 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:40:40,237 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] [2024-02-20 12:40:40,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-20 12:40:40,450 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 [2024-02-20 12:40:40,454 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:40:40,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:40:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash -541364218, now seen corresponding path program 5 times [2024-02-20 12:40:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:40:40,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549243965] [2024-02-20 12:40:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:40:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:40:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:40:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:40:42,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:40:42,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549243965] [2024-02-20 12:40:42,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549243965] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:40:42,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798929045] [2024-02-20 12:40:42,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:40:42,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:40:42,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:40:42,062 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) [2024-02-20 12:40:42,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 12:40:42,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:40:42,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:40:42,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2024-02-20 12:40:42,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:40:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:40:42,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:40:42,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:40:42,877 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 [2024-02-20 12:40:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:40:43,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798929045] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:40:43,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:40:43,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 34 [2024-02-20 12:40:43,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282790911] [2024-02-20 12:40:43,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:40:43,082 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-02-20 12:40:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:40:43,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-02-20 12:40:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2024-02-20 12:40:43,130 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-20 12:40:43,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 14770 transitions, 385905 flow. Second operand has 35 states, 35 states have (on average 6.2) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:40:43,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:40:43,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-20 12:40:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:44:34,131 INFO L124 PetriNetUnfolderBase]: 23721/44583 cut-off events. [2024-02-20 12:44:34,132 INFO L125 PetriNetUnfolderBase]: For 537622/537622 co-relation queries the response was YES. [2024-02-20 12:44:34,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536851 conditions, 44583 events. 23721/44583 cut-off events. For 537622/537622 co-relation queries the response was YES. Maximal size of possible extension queue 1560. Compared 416092 event pairs, 162 based on Foata normal form. 20/44598 useless extension candidates. Maximal degree in co-relation 462926. Up to 32299 conditions per place. [2024-02-20 12:44:34,660 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 9946 selfloop transitions, 3162 changer transitions 1948/15058 dead transitions. [2024-02-20 12:44:34,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 15058 transitions, 423240 flow [2024-02-20 12:44:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-20 12:44:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-20 12:44:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 474 transitions. [2024-02-20 12:44:34,662 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32916666666666666 [2024-02-20 12:44:34,663 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 531 predicate places. [2024-02-20 12:44:34,663 INFO L507 AbstractCegarLoop]: Abstraction has has 561 places, 15058 transitions, 423240 flow [2024-02-20 12:44:34,663 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.2) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:44:34,663 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:44:34,663 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] [2024-02-20 12:44:34,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 12:44:34,876 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 [2024-02-20 12:44:34,877 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:44:34,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:44:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1427781000, now seen corresponding path program 6 times [2024-02-20 12:44:34,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:44:34,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078275283] [2024-02-20 12:44:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:44:34,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:44:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:44:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:44:35,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:44:35,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078275283] [2024-02-20 12:44:35,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078275283] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:44:35,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107796836] [2024-02-20 12:44:35,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:44:35,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:44:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:44:35,621 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) [2024-02-20 12:44:35,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 12:44:35,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 12:44:35,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:44:35,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 12:44:35,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:44:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:44:36,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:44:36,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:44:36,194 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 [2024-02-20 12:44:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:44:36,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107796836] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:44:36,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:44:36,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-02-20 12:44:36,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255436408] [2024-02-20 12:44:36,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:44:36,284 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-02-20 12:44:36,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:44:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-02-20 12:44:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2024-02-20 12:44:36,306 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-20 12:44:36,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 15058 transitions, 423240 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) [2024-02-20 12:44:36,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:44:36,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-20 12:44:36,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:48:21,969 INFO L124 PetriNetUnfolderBase]: 23959/44943 cut-off events. [2024-02-20 12:48:21,969 INFO L125 PetriNetUnfolderBase]: For 568367/568367 co-relation queries the response was YES. [2024-02-20 12:48:22,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584170 conditions, 44943 events. 23959/44943 cut-off events. For 568367/568367 co-relation queries the response was YES. Maximal size of possible extension queue 1549. Compared 418596 event pairs, 162 based on Foata normal form. 1/44939 useless extension candidates. Maximal degree in co-relation 500067. Up to 32559 conditions per place. [2024-02-20 12:48:22,516 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 9983 selfloop transitions, 3207 changer transitions 2047/15239 dead transitions. [2024-02-20 12:48:22,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 15239 transitions, 458650 flow [2024-02-20 12:48:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-20 12:48:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-20 12:48:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 364 transitions. [2024-02-20 12:48:22,517 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2024-02-20 12:48:22,518 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 565 predicate places. [2024-02-20 12:48:22,518 INFO L507 AbstractCegarLoop]: Abstraction has has 595 places, 15239 transitions, 458650 flow [2024-02-20 12:48:22,518 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) [2024-02-20 12:48:22,518 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:48:22,518 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] [2024-02-20 12:48:22,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-20 12:48:22,730 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 [2024-02-20 12:48:22,731 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:48:22,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:48:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1060051654, now seen corresponding path program 7 times [2024-02-20 12:48:22,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:48:22,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796893257] [2024-02-20 12:48:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:48:22,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:48:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:48:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:48:23,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:48:23,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796893257] [2024-02-20 12:48:23,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796893257] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:48:23,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960086563] [2024-02-20 12:48:23,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:48:23,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:48:23,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:48:23,769 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) [2024-02-20 12:48:23,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 12:48:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:48:23,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 12:48:23,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:48:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:48:24,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:48:24,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:48:24,295 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 [2024-02-20 12:48:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 12:48:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960086563] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:48:24,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:48:24,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-02-20 12:48:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739215209] [2024-02-20 12:48:24,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:48:24,370 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-02-20 12:48:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:48:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-02-20 12:48:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2024-02-20 12:48:24,383 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-02-20 12:48:24,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 15239 transitions, 458650 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) [2024-02-20 12:48:24,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:48:24,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-02-20 12:48:24,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15