./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-two-queue.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-two-queue.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:19:39,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:19:39,583 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:19:39,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:19:39,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:19:39,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:19:39,614 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:19:39,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:19:39,615 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:19:39,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:19:39,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:19:39,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:19:39,621 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:19:39,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:19:39,623 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:19:39,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:19:39,623 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:19:39,623 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:19:39,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:19:39,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:19:39,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:19:39,624 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:19:39,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:19:39,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:19:39,625 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:19:39,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:19:39,625 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:19:39,626 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:19:39,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:19:39,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:19:39,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:19:39,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:19:39,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:19:39,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:19:39,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:19:39,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:19:39,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:19:39,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:19:39,628 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:19:39,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:19:39,629 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:19:39,629 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:19:39,629 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:19:39,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:19:39,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:19:39,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:19:39,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:19:39,853 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:19:39,854 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:19:39,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2024-01-31 17:19:40,921 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:19:41,099 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:19:41,100 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2024-01-31 17:19:41,106 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c188b0f5/799946bf00c94fd4a78b3e80204d98b8/FLAGbcde86991 [2024-01-31 17:19:41,116 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c188b0f5/799946bf00c94fd4a78b3e80204d98b8 [2024-01-31 17:19:41,118 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:19:41,118 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:19:41,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-two-queue.wvr.yml/witness.yml [2024-01-31 17:19:41,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:19:41,226 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:19:41,227 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:19:41,227 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:19:41,230 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:19:41,231 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:19:41" (1/2) ... [2024-01-31 17:19:41,232 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10968312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:19:41, skipping insertion in model container [2024-01-31 17:19:41,232 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:19:41" (1/2) ... [2024-01-31 17:19:41,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10f5d73e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:19:41, skipping insertion in model container [2024-01-31 17:19:41,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:19:41" (2/2) ... [2024-01-31 17:19:41,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10968312 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41, skipping insertion in model container [2024-01-31 17:19:41,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:19:41" (2/2) ... [2024-01-31 17:19:41,234 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:19:41,264 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:19:41,280 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:19:41,417 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-two-queue.wvr.c[3013,3026] [2024-01-31 17:19:41,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:19:41,454 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:19:41,471 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-two-queue.wvr.c[3013,3026] [2024-01-31 17:19:41,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:19:41,485 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:19:41,486 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41 WrapperNode [2024-01-31 17:19:41,486 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:19:41,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:19:41,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:19:41,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:19:41,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,502 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,523 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 210 [2024-01-31 17:19:41,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:19:41,524 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:19:41,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:19:41,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:19:41,541 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,544 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,557 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 6, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 2, 1, 1]. [2024-01-31 17:19:41,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,566 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,567 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,568 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,571 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:19:41,572 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:19:41,572 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:19:41,572 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:19:41,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (1/1) ... [2024-01-31 17:19:41,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:19:41,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:41,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 17:19:41,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 17:19:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:19:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:19:41,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:19:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:19:41,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:19:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:19:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:19:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:19:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:19:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:19:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:19:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:19:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:19:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:19:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:19:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:19:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:19:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:19:41,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:19:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:19:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:19:41,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:19:41,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:19:41,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:19:41,667 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:19:41,757 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:19:41,759 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:19:42,010 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:19:42,010 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:19:42,291 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:19:42,291 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 17:19:42,292 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:19:42 BoogieIcfgContainer [2024-01-31 17:19:42,292 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:19:42,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:19:42,296 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:19:42,298 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:19:42,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:19:41" (1/4) ... [2024-01-31 17:19:42,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dfb6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:19:42, skipping insertion in model container [2024-01-31 17:19:42,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:19:41" (2/4) ... [2024-01-31 17:19:42,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dfb6b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:19:42, skipping insertion in model container [2024-01-31 17:19:42,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:19:41" (3/4) ... [2024-01-31 17:19:42,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dfb6b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:19:42, skipping insertion in model container [2024-01-31 17:19:42,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:19:42" (4/4) ... [2024-01-31 17:19:42,301 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-01-31 17:19:42,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:19:42,313 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:19:42,314 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:19:42,346 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:19:42,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 72 flow [2024-01-31 17:19:42,406 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-01-31 17:19:42,406 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:19:42,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-01-31 17:19:42,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 72 flow [2024-01-31 17:19:42,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2024-01-31 17:19:42,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:19:42,429 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@724e3b38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:19:42,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:19:42,441 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:19:42,441 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-01-31 17:19:42,441 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:19:42,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:42,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:42,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:42,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash 613511028, now seen corresponding path program 1 times [2024-01-31 17:19:42,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:42,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291732074] [2024-01-31 17:19:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:42,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:42,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291732074] [2024-01-31 17:19:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291732074] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:19:42,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:19:42,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:19:42,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205531743] [2024-01-31 17:19:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:19:42,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:19:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:19:42,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:19:42,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:19:42,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:42,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:42,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:19:42,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:43,017 INFO L124 PetriNetUnfolderBase]: 150/281 cut-off events. [2024-01-31 17:19:43,018 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-01-31 17:19:43,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 281 events. 150/281 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1155 event pairs, 28 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 458. Up to 193 conditions per place. [2024-01-31 17:19:43,023 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 29 selfloop transitions, 3 changer transitions 1/38 dead transitions. [2024-01-31 17:19:43,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 163 flow [2024-01-31 17:19:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:19:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:19:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-31 17:19:43,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2024-01-31 17:19:43,035 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 3 states and 55 transitions. [2024-01-31 17:19:43,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 163 flow [2024-01-31 17:19:43,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 149 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:19:43,040 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 75 flow [2024-01-31 17:19:43,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2024-01-31 17:19:43,046 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2024-01-31 17:19:43,046 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 75 flow [2024-01-31 17:19:43,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:43,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:43,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:19:43,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:43,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1723399455, now seen corresponding path program 1 times [2024-01-31 17:19:43,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:43,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886453564] [2024-01-31 17:19:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:43,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:43,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:43,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886453564] [2024-01-31 17:19:43,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886453564] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:19:43,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:19:43,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:19:43,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108655433] [2024-01-31 17:19:43,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:19:43,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:19:43,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:19:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:19:43,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:19:43,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:43,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:19:43,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:43,264 INFO L124 PetriNetUnfolderBase]: 112/221 cut-off events. [2024-01-31 17:19:43,265 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-01-31 17:19:43,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 221 events. 112/221 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 819 event pairs, 23 based on Foata normal form. 6/221 useless extension candidates. Maximal degree in co-relation 130. Up to 154 conditions per place. [2024-01-31 17:19:43,267 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 27 selfloop transitions, 2 changer transitions 2/36 dead transitions. [2024-01-31 17:19:43,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 155 flow [2024-01-31 17:19:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:19:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:19:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-01-31 17:19:43,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-01-31 17:19:43,270 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 75 flow. Second operand 3 states and 51 transitions. [2024-01-31 17:19:43,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 155 flow [2024-01-31 17:19:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:19:43,277 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 84 flow [2024-01-31 17:19:43,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-01-31 17:19:43,278 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-01-31 17:19:43,283 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 84 flow [2024-01-31 17:19:43,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:43,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:43,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:19:43,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:43,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:43,286 INFO L85 PathProgramCache]: Analyzing trace with hash 60034967, now seen corresponding path program 1 times [2024-01-31 17:19:43,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:43,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135049302] [2024-01-31 17:19:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:43,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:43,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:43,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135049302] [2024-01-31 17:19:43,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135049302] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:19:43,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:19:43,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:19:43,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272737788] [2024-01-31 17:19:43,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:19:43,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:19:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:19:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:19:43,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:19:43,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:43,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:19:43,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:43,425 INFO L124 PetriNetUnfolderBase]: 86/179 cut-off events. [2024-01-31 17:19:43,425 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-01-31 17:19:43,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 179 events. 86/179 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 539 event pairs, 31 based on Foata normal form. 6/180 useless extension candidates. Maximal degree in co-relation 264. Up to 120 conditions per place. [2024-01-31 17:19:43,428 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 27 selfloop transitions, 2 changer transitions 5/39 dead transitions. [2024-01-31 17:19:43,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 178 flow [2024-01-31 17:19:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:19:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:19:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-01-31 17:19:43,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-01-31 17:19:43,431 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 84 flow. Second operand 3 states and 53 transitions. [2024-01-31 17:19:43,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 178 flow [2024-01-31 17:19:43,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 39 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:19:43,434 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 94 flow [2024-01-31 17:19:43,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-01-31 17:19:43,435 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-01-31 17:19:43,435 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 94 flow [2024-01-31 17:19:43,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:43,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:43,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:19:43,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:43,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:43,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1977425362, now seen corresponding path program 1 times [2024-01-31 17:19:43,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:43,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071025208] [2024-01-31 17:19:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:43,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:19:43,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071025208] [2024-01-31 17:19:43,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071025208] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:19:43,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:19:43,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:19:43,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384731529] [2024-01-31 17:19:43,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:19:43,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:19:43,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:43,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:19:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:19:43,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:19:43,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:43,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:19:43,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:43,587 INFO L124 PetriNetUnfolderBase]: 102/231 cut-off events. [2024-01-31 17:19:43,588 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-01-31 17:19:43,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 231 events. 102/231 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 907 event pairs, 71 based on Foata normal form. 5/227 useless extension candidates. Maximal degree in co-relation 283. Up to 163 conditions per place. [2024-01-31 17:19:43,589 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 24 selfloop transitions, 2 changer transitions 13/44 dead transitions. [2024-01-31 17:19:43,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 207 flow [2024-01-31 17:19:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:19:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:19:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-01-31 17:19:43,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-01-31 17:19:43,590 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 94 flow. Second operand 4 states and 64 transitions. [2024-01-31 17:19:43,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 207 flow [2024-01-31 17:19:43,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:19:43,591 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 106 flow [2024-01-31 17:19:43,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-01-31 17:19:43,592 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2024-01-31 17:19:43,592 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 106 flow [2024-01-31 17:19:43,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:43,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:43,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:19:43,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:43,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:43,593 INFO L85 PathProgramCache]: Analyzing trace with hash -603007364, now seen corresponding path program 1 times [2024-01-31 17:19:43,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:43,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170832871] [2024-01-31 17:19:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:19:43,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:43,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170832871] [2024-01-31 17:19:43,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170832871] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:19:43,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:19:43,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:19:43,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259526891] [2024-01-31 17:19:43,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:19:43,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:19:43,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:19:43,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:19:43,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:19:43,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:43,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:19:43,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:43,753 INFO L124 PetriNetUnfolderBase]: 101/228 cut-off events. [2024-01-31 17:19:43,753 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-01-31 17:19:43,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 228 events. 101/228 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 887 event pairs, 71 based on Foata normal form. 7/226 useless extension candidates. Maximal degree in co-relation 517. Up to 164 conditions per place. [2024-01-31 17:19:43,754 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 2 changer transitions 11/43 dead transitions. [2024-01-31 17:19:43,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 214 flow [2024-01-31 17:19:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:19:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:19:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-01-31 17:19:43,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-01-31 17:19:43,756 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 106 flow. Second operand 4 states and 62 transitions. [2024-01-31 17:19:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 214 flow [2024-01-31 17:19:43,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 206 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 17:19:43,757 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 114 flow [2024-01-31 17:19:43,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-01-31 17:19:43,758 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-01-31 17:19:43,758 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 114 flow [2024-01-31 17:19:43,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:43,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:43,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:43,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:19:43,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:43,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1194095157, now seen corresponding path program 1 times [2024-01-31 17:19:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:43,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29721468] [2024-01-31 17:19:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:45,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:45,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29721468] [2024-01-31 17:19:45,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29721468] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:45,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768849180] [2024-01-31 17:19:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:45,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:45,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:45,062 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:45,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:19:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:45,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 17:19:45,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:45,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:19:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:19:45,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:46,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:19:46,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 297 [2024-01-31 17:19:47,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:19:47,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-01-31 17:19:47,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:19:47,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-01-31 17:19:47,095 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:19:47,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2024-01-31 17:19:47,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:19:47,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-01-31 17:19:47,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:19:47,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-01-31 17:19:47,741 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:19:47,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2024-01-31 17:19:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:19:47,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-01-31 17:19:47,764 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:19:47,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2024-01-31 17:19:47,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:19:47,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 17:19:47,826 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:19:47,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2024-01-31 17:19:47,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:19:47,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-01-31 17:19:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:19:47,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 17:19:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:19:47,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 17:19:47,857 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:19:47,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2024-01-31 17:19:47,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:19:47,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 85 [2024-01-31 17:19:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:19:48,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768849180] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:48,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:48,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-01-31 17:19:48,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264558004] [2024-01-31 17:19:48,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-31 17:19:48,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-31 17:19:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2024-01-31 17:19:48,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:19:48,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 114 flow. Second operand has 39 states, 39 states have (on average 6.666666666666667) internal successors, (260), 39 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:48,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:48,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:19:48,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:52,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:19:56,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:20:00,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:20:05,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:20:09,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:20:10,899 INFO L124 PetriNetUnfolderBase]: 491/930 cut-off events. [2024-01-31 17:20:10,899 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-01-31 17:20:10,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2247 conditions, 930 events. 491/930 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4383 event pairs, 33 based on Foata normal form. 7/820 useless extension candidates. Maximal degree in co-relation 1916. Up to 163 conditions per place. [2024-01-31 17:20:10,904 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 129 selfloop transitions, 108 changer transitions 40/280 dead transitions. [2024-01-31 17:20:10,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 280 transitions, 1361 flow [2024-01-31 17:20:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-01-31 17:20:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-01-31 17:20:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 558 transitions. [2024-01-31 17:20:10,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-01-31 17:20:10,911 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 114 flow. Second operand 54 states and 558 transitions. [2024-01-31 17:20:10,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 280 transitions, 1361 flow [2024-01-31 17:20:10,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 280 transitions, 1343 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-31 17:20:10,921 INFO L231 Difference]: Finished difference. Result has 114 places, 135 transitions, 909 flow [2024-01-31 17:20:10,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=909, PETRI_PLACES=114, PETRI_TRANSITIONS=135} [2024-01-31 17:20:10,924 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2024-01-31 17:20:10,924 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 135 transitions, 909 flow [2024-01-31 17:20:10,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.666666666666667) internal successors, (260), 39 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:20:10,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:10,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:10,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:20:11,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-31 17:20:11,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:20:11,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash -979155957, now seen corresponding path program 2 times [2024-01-31 17:20:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:11,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246227043] [2024-01-31 17:20:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:12,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:12,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246227043] [2024-01-31 17:20:12,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246227043] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:12,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300769728] [2024-01-31 17:20:12,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:20:12,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:12,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:20:12,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:20:12,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:20:12,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:12,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-31 17:20:12,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:12,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-31 17:20:12,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:12,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:20:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:12,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:20:12,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:12,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:20:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:12,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:20:12,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:12,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:20:12,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:20:12,588 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:20:12,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:20:12,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:20:13,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2024-01-31 17:20:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:13,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:18,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:20:18,923 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 356 treesize of output 332 [2024-01-31 17:20:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300769728] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:19,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:19,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-01-31 17:20:19,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384864972] [2024-01-31 17:20:19,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:19,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-01-31 17:20:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-01-31 17:20:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1484, Unknown=1, NotChecked=0, Total=1640 [2024-01-31 17:20:19,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:20:19,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 135 transitions, 909 flow. Second operand has 41 states, 41 states have (on average 6.634146341463414) internal successors, (272), 41 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:20:19,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:19,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:20:19,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:29,946 INFO L124 PetriNetUnfolderBase]: 1223/2266 cut-off events. [2024-01-31 17:20:29,947 INFO L125 PetriNetUnfolderBase]: For 15764/15764 co-relation queries the response was YES. [2024-01-31 17:20:29,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10711 conditions, 2266 events. 1223/2266 cut-off events. For 15764/15764 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13165 event pairs, 67 based on Foata normal form. 19/2282 useless extension candidates. Maximal degree in co-relation 8630. Up to 428 conditions per place. [2024-01-31 17:20:29,962 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 267 selfloop transitions, 265 changer transitions 28/563 dead transitions. [2024-01-31 17:20:29,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 563 transitions, 4977 flow [2024-01-31 17:20:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-01-31 17:20:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-01-31 17:20:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 717 transitions. [2024-01-31 17:20:29,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924466338259442 [2024-01-31 17:20:29,966 INFO L175 Difference]: Start difference. First operand has 114 places, 135 transitions, 909 flow. Second operand 63 states and 717 transitions. [2024-01-31 17:20:29,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 563 transitions, 4977 flow [2024-01-31 17:20:29,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 563 transitions, 4568 flow, removed 174 selfloop flow, removed 7 redundant places. [2024-01-31 17:20:30,002 INFO L231 Difference]: Finished difference. Result has 188 places, 338 transitions, 3115 flow [2024-01-31 17:20:30,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=3115, PETRI_PLACES=188, PETRI_TRANSITIONS=338} [2024-01-31 17:20:30,003 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-01-31 17:20:30,003 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 338 transitions, 3115 flow [2024-01-31 17:20:30,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.634146341463414) internal successors, (272), 41 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:20:30,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:30,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:30,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 17:20:30,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-01-31 17:20:30,216 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:20:30,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:30,217 INFO L85 PathProgramCache]: Analyzing trace with hash 117901999, now seen corresponding path program 3 times [2024-01-31 17:20:30,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:30,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960980578] [2024-01-31 17:20:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:30,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:31,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:31,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960980578] [2024-01-31 17:20:31,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960980578] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:31,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348516160] [2024-01-31 17:20:31,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:20:31,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:31,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:31,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:20:31,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:20:31,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:20:31,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:31,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 52 conjunts are in the unsatisfiable core [2024-01-31 17:20:31,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:31,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-01-31 17:20:31,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:31,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:20:31,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:31,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:20:31,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:31,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:20:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:31,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:20:31,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:31,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:20:31,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:20:31,582 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:20:31,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:20:31,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:20:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:32,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:36,886 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-01-31 17:20:36,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 379 treesize of output 389 [2024-01-31 17:20:36,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:20:36,938 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 238 treesize of output 232 [2024-01-31 17:20:37,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-01-31 17:20:37,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:20:37,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 236 [2024-01-31 17:20:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:39,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348516160] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:39,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:39,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 35 [2024-01-31 17:20:39,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850309415] [2024-01-31 17:20:39,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:39,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-31 17:20:39,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-31 17:20:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1122, Unknown=1, NotChecked=0, Total=1260 [2024-01-31 17:20:39,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:20:39,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 338 transitions, 3115 flow. Second operand has 36 states, 36 states have (on average 6.805555555555555) internal successors, (245), 36 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:20:39,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:39,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:20:39,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:46,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:20:49,689 INFO L124 PetriNetUnfolderBase]: 2172/3891 cut-off events. [2024-01-31 17:20:49,690 INFO L125 PetriNetUnfolderBase]: For 45667/45667 co-relation queries the response was YES. [2024-01-31 17:20:49,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23170 conditions, 3891 events. 2172/3891 cut-off events. For 45667/45667 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24436 event pairs, 136 based on Foata normal form. 8/3898 useless extension candidates. Maximal degree in co-relation 22346. Up to 1333 conditions per place. [2024-01-31 17:20:49,736 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 459 selfloop transitions, 362 changer transitions 7/831 dead transitions. [2024-01-31 17:20:49,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 831 transitions, 9876 flow [2024-01-31 17:20:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-31 17:20:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-31 17:20:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 556 transitions. [2024-01-31 17:20:49,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912737508796622 [2024-01-31 17:20:49,743 INFO L175 Difference]: Start difference. First operand has 188 places, 338 transitions, 3115 flow. Second operand 49 states and 556 transitions. [2024-01-31 17:20:49,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 831 transitions, 9876 flow [2024-01-31 17:20:49,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 831 transitions, 9068 flow, removed 381 selfloop flow, removed 14 redundant places. [2024-01-31 17:20:50,011 INFO L231 Difference]: Finished difference. Result has 236 places, 558 transitions, 5784 flow [2024-01-31 17:20:50,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5784, PETRI_PLACES=236, PETRI_TRANSITIONS=558} [2024-01-31 17:20:50,015 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2024-01-31 17:20:50,015 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 558 transitions, 5784 flow [2024-01-31 17:20:50,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.805555555555555) internal successors, (245), 36 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:20:50,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:50,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:50,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:20:50,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:50,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:20:50,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2048925325, now seen corresponding path program 4 times [2024-01-31 17:20:50,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:50,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690491162] [2024-01-31 17:20:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:50,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:51,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:51,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690491162] [2024-01-31 17:20:51,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690491162] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:51,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606339054] [2024-01-31 17:20:51,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:20:51,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:51,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:51,491 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) [2024-01-31 17:20:51,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:20:51,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:20:51,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:51,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:20:51,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:51,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:20:52,331 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-01-31 17:20:52,331 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 48 treesize of output 20 [2024-01-31 17:20:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:20:52,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:53,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:20:53,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 324 [2024-01-31 17:20:54,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:20:54,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-01-31 17:20:54,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:54,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-01-31 17:20:54,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:54,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-01-31 17:20:54,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:20:54,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2024-01-31 17:20:54,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:54,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-01-31 17:20:54,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:20:54,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-01-31 17:20:54,725 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:20:54,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2024-01-31 17:20:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:20:54,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-01-31 17:20:55,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:20:55,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 480 treesize of output 1148 [2024-01-31 17:21:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:21:03,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606339054] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:21:03,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:21:03,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-01-31 17:21:03,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962402318] [2024-01-31 17:21:03,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:21:03,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-31 17:21:03,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:21:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-31 17:21:03,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2024-01-31 17:21:03,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:21:03,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 558 transitions, 5784 flow. Second operand has 39 states, 39 states have (on average 6.717948717948718) internal successors, (262), 39 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:21:03,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:21:03,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:21:03,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:21:26,528 INFO L124 PetriNetUnfolderBase]: 2771/4981 cut-off events. [2024-01-31 17:21:26,529 INFO L125 PetriNetUnfolderBase]: For 59231/59231 co-relation queries the response was YES. [2024-01-31 17:21:26,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30684 conditions, 4981 events. 2771/4981 cut-off events. For 59231/59231 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32473 event pairs, 122 based on Foata normal form. 9/4983 useless extension candidates. Maximal degree in co-relation 29755. Up to 1359 conditions per place. [2024-01-31 17:21:26,577 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 400 selfloop transitions, 617 changer transitions 7/1027 dead transitions. [2024-01-31 17:21:26,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1027 transitions, 12671 flow [2024-01-31 17:21:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-01-31 17:21:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2024-01-31 17:21:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 821 transitions. [2024-01-31 17:21:26,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3495104299702001 [2024-01-31 17:21:26,586 INFO L175 Difference]: Start difference. First operand has 236 places, 558 transitions, 5784 flow. Second operand 81 states and 821 transitions. [2024-01-31 17:21:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1027 transitions, 12671 flow [2024-01-31 17:21:26,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1027 transitions, 12456 flow, removed 71 selfloop flow, removed 14 redundant places. [2024-01-31 17:21:26,808 INFO L231 Difference]: Finished difference. Result has 326 places, 770 transitions, 10487 flow [2024-01-31 17:21:26,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=10487, PETRI_PLACES=326, PETRI_TRANSITIONS=770} [2024-01-31 17:21:26,810 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 297 predicate places. [2024-01-31 17:21:26,810 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 770 transitions, 10487 flow [2024-01-31 17:21:26,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.717948717948718) internal successors, (262), 39 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:21:26,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:21:26,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:21:26,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 17:21:27,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:21:27,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:21:27,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:21:27,022 INFO L85 PathProgramCache]: Analyzing trace with hash -739109291, now seen corresponding path program 5 times [2024-01-31 17:21:27,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:21:27,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944101724] [2024-01-31 17:21:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:21:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:21:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:21:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:21:28,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:21:28,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944101724] [2024-01-31 17:21:28,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944101724] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:21:28,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999723391] [2024-01-31 17:21:28,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:21:28,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:21:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:21:28,091 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) [2024-01-31 17:21:28,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:21:28,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:21:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:21:28,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:21:28,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:21:28,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:21:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:21:28,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:21:29,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:21:29,065 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 147 treesize of output 145 [2024-01-31 17:21:29,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:21:29,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:21:29,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:21:29,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 184 treesize of output 245 [2024-01-31 17:21:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:21:30,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999723391] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:21:30,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:21:30,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 10] total 33 [2024-01-31 17:21:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949094688] [2024-01-31 17:21:30,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:21:30,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:21:30,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:21:30,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:21:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:21:30,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:21:30,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 770 transitions, 10487 flow. Second operand has 34 states, 34 states have (on average 6.911764705882353) internal successors, (235), 34 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:21:30,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:21:30,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:21:30,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:21:35,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:21:40,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:21:44,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:21:48,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:21:52,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:21:56,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:22:00,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:22:04,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:22:06,683 INFO L124 PetriNetUnfolderBase]: 2932/5255 cut-off events. [2024-01-31 17:22:06,683 INFO L125 PetriNetUnfolderBase]: For 109681/109681 co-relation queries the response was YES. [2024-01-31 17:22:06,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39453 conditions, 5255 events. 2932/5255 cut-off events. For 109681/109681 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34664 event pairs, 278 based on Foata normal form. 1/5256 useless extension candidates. Maximal degree in co-relation 38762. Up to 3129 conditions per place. [2024-01-31 17:22:06,767 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 498 selfloop transitions, 421 changer transitions 4/926 dead transitions. [2024-01-31 17:22:06,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 926 transitions, 14402 flow [2024-01-31 17:22:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-31 17:22:06,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-31 17:22:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 419 transitions. [2024-01-31 17:22:06,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3440065681444992 [2024-01-31 17:22:06,769 INFO L175 Difference]: Start difference. First operand has 326 places, 770 transitions, 10487 flow. Second operand 42 states and 419 transitions. [2024-01-31 17:22:06,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 926 transitions, 14402 flow [2024-01-31 17:22:07,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 926 transitions, 13603 flow, removed 303 selfloop flow, removed 31 redundant places. [2024-01-31 17:22:07,522 INFO L231 Difference]: Finished difference. Result has 341 places, 816 transitions, 11350 flow [2024-01-31 17:22:07,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9764, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11350, PETRI_PLACES=341, PETRI_TRANSITIONS=816} [2024-01-31 17:22:07,523 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 312 predicate places. [2024-01-31 17:22:07,523 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 816 transitions, 11350 flow [2024-01-31 17:22:07,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.911764705882353) internal successors, (235), 34 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:07,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:07,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:07,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 17:22:07,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 17:22:07,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:07,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:07,737 INFO L85 PathProgramCache]: Analyzing trace with hash 723746827, now seen corresponding path program 6 times [2024-01-31 17:22:07,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:07,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243289558] [2024-01-31 17:22:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:07,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:08,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:08,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243289558] [2024-01-31 17:22:08,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243289558] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:22:08,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705168324] [2024-01-31 17:22:08,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:22:08,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:08,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:08,662 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) [2024-01-31 17:22:08,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:22:08,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:22:08,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:22:08,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 17:22:08,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:22:08,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:22:08,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:22:08,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:22:08,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:22:08,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:22:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:22:08,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:22:08,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:22:08,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:22:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:22:08,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:22:08,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:22:08,926 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:22:08,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:22:08,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:22:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:09,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:22:11,369 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-01-31 17:22:11,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 315 treesize of output 333 [2024-01-31 17:22:11,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:22:11,391 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 187 treesize of output 183 [2024-01-31 17:22:11,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-01-31 17:22:11,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:22:11,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 184 [2024-01-31 17:22:12,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:22:12,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 247 treesize of output 242 [2024-01-31 17:22:12,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:22:12,479 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 206 treesize of output 202 [2024-01-31 17:22:12,540 INFO L349 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2024-01-31 17:22:12,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 186 [2024-01-31 17:22:12,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-01-31 17:22:12,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:22:12,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 246 [2024-01-31 17:22:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:15,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705168324] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:22:15,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:22:15,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-01-31 17:22:15,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186029413] [2024-01-31 17:22:15,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:22:15,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-01-31 17:22:15,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-01-31 17:22:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2024-01-31 17:22:15,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:22:15,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 816 transitions, 11350 flow. Second operand has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:15,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:15,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:22:15,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:42,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:23:05,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:24:36,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:24:40,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:25:29,212 INFO L124 PetriNetUnfolderBase]: 3647/6521 cut-off events. [2024-01-31 17:25:29,212 INFO L125 PetriNetUnfolderBase]: For 140033/140033 co-relation queries the response was YES. [2024-01-31 17:25:29,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50262 conditions, 6521 events. 3647/6521 cut-off events. For 140033/140033 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 45149 event pairs, 314 based on Foata normal form. 35/6556 useless extension candidates. Maximal degree in co-relation 49582. Up to 3257 conditions per place. [2024-01-31 17:25:29,269 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 587 selfloop transitions, 645 changer transitions 12/1247 dead transitions. [2024-01-31 17:25:29,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1247 transitions, 19942 flow [2024-01-31 17:25:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-01-31 17:25:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-01-31 17:25:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 696 transitions. [2024-01-31 17:25:29,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3582089552238806 [2024-01-31 17:25:29,272 INFO L175 Difference]: Start difference. First operand has 341 places, 816 transitions, 11350 flow. Second operand 67 states and 696 transitions. [2024-01-31 17:25:29,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1247 transitions, 19942 flow [2024-01-31 17:25:30,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1247 transitions, 19688 flow, removed 56 selfloop flow, removed 25 redundant places. [2024-01-31 17:25:30,024 INFO L231 Difference]: Finished difference. Result has 409 places, 1022 transitions, 17220 flow [2024-01-31 17:25:30,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11128, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=17220, PETRI_PLACES=409, PETRI_TRANSITIONS=1022} [2024-01-31 17:25:30,025 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 380 predicate places. [2024-01-31 17:25:30,025 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1022 transitions, 17220 flow [2024-01-31 17:25:30,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:30,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:30,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:30,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:25:30,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:30,239 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:30,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1501838009, now seen corresponding path program 7 times [2024-01-31 17:25:30,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:30,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229054580] [2024-01-31 17:25:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:30,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:25:35,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:35,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229054580] [2024-01-31 17:25:35,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229054580] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:35,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347370102] [2024-01-31 17:25:35,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:25:35,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:35,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:35,166 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) [2024-01-31 17:25:35,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:25:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:35,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-31 17:25:35,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:35,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-31 17:25:35,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:25:35,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:25:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:25:35,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:25:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:25:35,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:25:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:25:35,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:25:35,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:25:35,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:25:35,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:25:36,294 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:25:36,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:25:36,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:25:39,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2024-01-31 17:25:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:25:41,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:53,625 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-01-31 17:25:53,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 264 treesize of output 282 [2024-01-31 17:25:53,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:53,692 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 227 treesize of output 225 [2024-01-31 17:25:53,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-01-31 17:25:54,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:54,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 220 [2024-01-31 17:25:57,290 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-01-31 17:25:57,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 645 treesize of output 563 [2024-01-31 17:25:57,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:57,396 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 401 treesize of output 387 [2024-01-31 17:25:58,912 INFO L173 IndexEqualityManager]: detected equality via solver [2024-01-31 17:25:59,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:59,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 73 [2024-01-31 17:25:59,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:59,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 65 [2024-01-31 17:25:59,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:59,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 273 treesize of output 259 [2024-01-31 17:26:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:02,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347370102] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:02,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:26:02,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-01-31 17:26:02,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165420175] [2024-01-31 17:26:02,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:02,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-01-31 17:26:02,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:02,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-01-31 17:26:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1481, Unknown=1, NotChecked=0, Total=1640 [2024-01-31 17:26:03,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:26:03,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1022 transitions, 17220 flow. Second operand has 41 states, 41 states have (on average 6.634146341463414) internal successors, (272), 41 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:03,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:03,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:26:03,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:12,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:26:16,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:26:18,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:26:44,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:26:50,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:27:05,961 INFO L124 PetriNetUnfolderBase]: 3808/6814 cut-off events. [2024-01-31 17:27:05,961 INFO L125 PetriNetUnfolderBase]: For 269438/269438 co-relation queries the response was YES. [2024-01-31 17:27:06,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63586 conditions, 6814 events. 3808/6814 cut-off events. For 269438/269438 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 47445 event pairs, 326 based on Foata normal form. 10/6824 useless extension candidates. Maximal degree in co-relation 62741. Up to 3197 conditions per place. [2024-01-31 17:27:06,091 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 518 selfloop transitions, 693 changer transitions 6/1220 dead transitions. [2024-01-31 17:27:06,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1220 transitions, 22908 flow [2024-01-31 17:27:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 17:27:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 17:27:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 466 transitions. [2024-01-31 17:27:06,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652037617554859 [2024-01-31 17:27:06,093 INFO L175 Difference]: Start difference. First operand has 409 places, 1022 transitions, 17220 flow. Second operand 44 states and 466 transitions. [2024-01-31 17:27:06,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1220 transitions, 22908 flow [2024-01-31 17:27:07,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1220 transitions, 21891 flow, removed 471 selfloop flow, removed 21 redundant places. [2024-01-31 17:27:07,481 INFO L231 Difference]: Finished difference. Result has 441 places, 1093 transitions, 20069 flow [2024-01-31 17:27:07,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16455, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=20069, PETRI_PLACES=441, PETRI_TRANSITIONS=1093} [2024-01-31 17:27:07,482 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 412 predicate places. [2024-01-31 17:27:07,483 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1093 transitions, 20069 flow [2024-01-31 17:27:07,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.634146341463414) internal successors, (272), 41 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:07,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:07,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:07,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:27:07,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:07,695 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:07,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash -723476079, now seen corresponding path program 8 times [2024-01-31 17:27:07,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:07,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997665967] [2024-01-31 17:27:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:07,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:14,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:14,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997665967] [2024-01-31 17:27:14,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997665967] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:14,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328273394] [2024-01-31 17:27:14,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:27:14,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:14,774 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) [2024-01-31 17:27:14,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:27:14,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:27:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:14,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:27:14,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:15,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:27:19,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:27:19,640 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 48 treesize of output 36 [2024-01-31 17:27:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:27:20,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:27,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:27:27,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 324 [2024-01-31 17:27:29,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:27:29,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-01-31 17:27:29,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:27:29,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-01-31 17:27:30,056 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:27:30,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2024-01-31 17:27:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:27:30,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-01-31 17:27:31,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:27:31,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-01-31 17:27:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:27:31,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-01-31 17:27:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:27:31,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-01-31 17:27:31,846 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:27:31,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2024-01-31 17:27:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:27:31,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-01-31 17:27:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:27:31,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-01-31 17:27:31,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:27:31,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-01-31 17:27:32,006 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:27:32,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2024-01-31 17:27:32,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:27:32,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-01-31 17:27:35,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:27:35,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 458 treesize of output 1132 [2024-01-31 17:27:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:45,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328273394] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:45,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:45,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 40 [2024-01-31 17:27:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318845227] [2024-01-31 17:27:45,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-01-31 17:27:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-01-31 17:27:45,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2024-01-31 17:27:45,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:27:45,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1093 transitions, 20069 flow. Second operand has 41 states, 41 states have (on average 6.634146341463414) internal successors, (272), 41 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:45,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:45,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:27:45,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:22,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:29:23,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-31 17:29:40,887 INFO L124 PetriNetUnfolderBase]: 5589/10001 cut-off events. [2024-01-31 17:29:40,888 INFO L125 PetriNetUnfolderBase]: For 463288/463288 co-relation queries the response was YES. [2024-01-31 17:29:41,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101040 conditions, 10001 events. 5589/10001 cut-off events. For 463288/463288 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 73341 event pairs, 213 based on Foata normal form. 70/10071 useless extension candidates. Maximal degree in co-relation 100302. Up to 2081 conditions per place. [2024-01-31 17:29:41,082 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 571 selfloop transitions, 1352 changer transitions 11/1937 dead transitions. [2024-01-31 17:29:41,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 1937 transitions, 39626 flow [2024-01-31 17:29:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-01-31 17:29:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2024-01-31 17:29:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 1037 transitions. [2024-01-31 17:29:41,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35758620689655174 [2024-01-31 17:29:41,085 INFO L175 Difference]: Start difference. First operand has 441 places, 1093 transitions, 20069 flow. Second operand 100 states and 1037 transitions. [2024-01-31 17:29:41,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 1937 transitions, 39626 flow [2024-01-31 17:29:44,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1937 transitions, 39324 flow, removed 107 selfloop flow, removed 23 redundant places. [2024-01-31 17:29:44,030 INFO L231 Difference]: Finished difference. Result has 552 places, 1635 transitions, 36525 flow [2024-01-31 17:29:44,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19653, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=840, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=36525, PETRI_PLACES=552, PETRI_TRANSITIONS=1635} [2024-01-31 17:29:44,031 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 523 predicate places. [2024-01-31 17:29:44,031 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 1635 transitions, 36525 flow [2024-01-31 17:29:44,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.634146341463414) internal successors, (272), 41 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:44,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:44,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:44,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-31 17:29:44,243 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:29:44,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1019187230, now seen corresponding path program 9 times [2024-01-31 17:29:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:44,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011326766] [2024-01-31 17:29:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:50,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011326766] [2024-01-31 17:29:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011326766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66784792] [2024-01-31 17:29:50,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:29:50,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:50,506 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) [2024-01-31 17:29:50,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:29:50,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:29:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:50,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:29:50,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:53,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:29:53,311 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 58 treesize of output 38 [2024-01-31 17:29:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:29:54,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:57,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:29:57,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 270 [2024-01-31 17:30:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:30:07,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66784792] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:30:07,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:30:07,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 34 [2024-01-31 17:30:07,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601950045] [2024-01-31 17:30:07,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:30:07,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 17:30:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:30:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 17:30:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 17:30:07,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:30:07,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1635 transitions, 36525 flow. Second operand has 35 states, 35 states have (on average 6.914285714285715) internal successors, (242), 35 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) [2024-01-31 17:30:07,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:30:07,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:30:07,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:30:30,644 INFO L124 PetriNetUnfolderBase]: 6017/10766 cut-off events. [2024-01-31 17:30:30,644 INFO L125 PetriNetUnfolderBase]: For 561566/561566 co-relation queries the response was YES. [2024-01-31 17:30:30,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120444 conditions, 10766 events. 6017/10766 cut-off events. For 561566/561566 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 80343 event pairs, 653 based on Foata normal form. 6/10772 useless extension candidates. Maximal degree in co-relation 119662. Up to 7673 conditions per place. [2024-01-31 17:30:30,776 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 1179 selfloop transitions, 695 changer transitions 6/1883 dead transitions. [2024-01-31 17:30:30,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1883 transitions, 45843 flow [2024-01-31 17:30:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 17:30:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 17:30:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 340 transitions. [2024-01-31 17:30:30,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3552769070010449 [2024-01-31 17:30:30,777 INFO L175 Difference]: Start difference. First operand has 552 places, 1635 transitions, 36525 flow. Second operand 33 states and 340 transitions. [2024-01-31 17:30:30,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1883 transitions, 45843 flow [2024-01-31 17:30:35,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1883 transitions, 43202 flow, removed 1225 selfloop flow, removed 13 redundant places. [2024-01-31 17:30:35,830 INFO L231 Difference]: Finished difference. Result has 585 places, 1765 transitions, 40368 flow [2024-01-31 17:30:35,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=34490, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=40368, PETRI_PLACES=585, PETRI_TRANSITIONS=1765} [2024-01-31 17:30:35,832 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 556 predicate places. [2024-01-31 17:30:35,832 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 1765 transitions, 40368 flow [2024-01-31 17:30:35,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.914285714285715) internal successors, (242), 35 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) [2024-01-31 17:30:35,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:30:35,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:30:35,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 17:30:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 17:30:36,045 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:30:36,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:30:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1955487334, now seen corresponding path program 10 times [2024-01-31 17:30:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:30:36,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459518887] [2024-01-31 17:30:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:30:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:30:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:30:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:30:42,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:30:42,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459518887] [2024-01-31 17:30:42,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459518887] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:30:42,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481347968] [2024-01-31 17:30:42,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:30:42,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:30:42,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:30:42,889 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) [2024-01-31 17:30:42,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:30:42,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:30:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:30:42,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:30:42,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:30:45,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:30:45,626 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 60 treesize of output 40 [2024-01-31 17:30:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:30:46,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:30:50,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:30:50,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 270 [2024-01-31 17:31:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:31:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481347968] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:31:12,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:31:12,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 33 [2024-01-31 17:31:12,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302029143] [2024-01-31 17:31:12,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:31:12,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:31:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:31:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:31:13,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:31:13,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1765 transitions, 40368 flow. Second operand has 34 states, 34 states have (on average 6.970588235294118) internal successors, (237), 34 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:31:13,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:13,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:31:13,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:38,089 INFO L124 PetriNetUnfolderBase]: 6365/11413 cut-off events. [2024-01-31 17:31:38,090 INFO L125 PetriNetUnfolderBase]: For 559260/559260 co-relation queries the response was YES. [2024-01-31 17:31:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125844 conditions, 11413 events. 6365/11413 cut-off events. For 559260/559260 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 86250 event pairs, 641 based on Foata normal form. 2/11415 useless extension candidates. Maximal degree in co-relation 125019. Up to 7191 conditions per place. [2024-01-31 17:31:38,401 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 1131 selfloop transitions, 887 changer transitions 4/2025 dead transitions. [2024-01-31 17:31:38,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 2025 transitions, 49557 flow [2024-01-31 17:31:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 17:31:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 17:31:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 375 transitions. [2024-01-31 17:31:38,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494874184529357 [2024-01-31 17:31:38,414 INFO L175 Difference]: Start difference. First operand has 585 places, 1765 transitions, 40368 flow. Second operand 37 states and 375 transitions. [2024-01-31 17:31:38,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 2025 transitions, 49557 flow [2024-01-31 17:31:44,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 2025 transitions, 49039 flow, removed 221 selfloop flow, removed 10 redundant places. [2024-01-31 17:31:44,351 INFO L231 Difference]: Finished difference. Result has 619 places, 1893 transitions, 45750 flow [2024-01-31 17:31:44,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=39873, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=775, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=45750, PETRI_PLACES=619, PETRI_TRANSITIONS=1893} [2024-01-31 17:31:44,352 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 590 predicate places. [2024-01-31 17:31:44,352 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1893 transitions, 45750 flow [2024-01-31 17:31:44,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.970588235294118) internal successors, (237), 34 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:31:44,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:44,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:44,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-01-31 17:31:44,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:31:44,561 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:31:44,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:44,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1966799205, now seen corresponding path program 11 times [2024-01-31 17:31:44,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:44,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162802192] [2024-01-31 17:31:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:44,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:31:50,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162802192] [2024-01-31 17:31:50,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162802192] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:31:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416335330] [2024-01-31 17:31:50,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:31:50,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:50,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:50,645 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) [2024-01-31 17:31:50,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:31:50,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:31:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:31:50,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 17:31:50,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:31:51,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:31:55,776 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-01-31 17:31:55,776 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 48 treesize of output 20 [2024-01-31 17:31:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:31:56,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:32:02,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:32:02,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 324 [2024-01-31 17:32:04,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:32:04,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-01-31 17:32:04,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:32:04,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-01-31 17:32:04,263 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:32:04,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2024-01-31 17:32:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:32:04,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-01-31 17:32:06,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:32:06,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2024-01-31 17:32:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:32:06,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-01-31 17:32:06,450 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:32:06,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2024-01-31 17:32:06,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:32:06,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-01-31 17:32:06,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:32:06,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-01-31 17:32:06,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:32:06,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-01-31 17:32:12,390 WARN L293 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 389 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-01-31 17:32:12,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:32:12,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 517 treesize of output 1473 [2024-01-31 17:32:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:32:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416335330] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:32:43,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:32:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 40 [2024-01-31 17:32:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449006246] [2024-01-31 17:32:43,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:32:43,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-01-31 17:32:43,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-01-31 17:32:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2024-01-31 17:32:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-31 17:32:45,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1893 transitions, 45750 flow. Second operand has 41 states, 41 states have (on average 6.682926829268292) internal successors, (274), 41 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:32:45,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:45,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-31 17:32:45,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:33:52,873 INFO L124 PetriNetUnfolderBase]: 6694/12032 cut-off events. [2024-01-31 17:33:52,873 INFO L125 PetriNetUnfolderBase]: For 627639/627639 co-relation queries the response was YES. [2024-01-31 17:33:52,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135969 conditions, 12032 events. 6694/12032 cut-off events. For 627639/627639 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 92444 event pairs, 439 based on Foata normal form. 5/12037 useless extension candidates. Maximal degree in co-relation 135154. Up to 4920 conditions per place. [2024-01-31 17:33:53,043 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 751 selfloop transitions, 1411 changer transitions 5/2170 dead transitions. [2024-01-31 17:33:53,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 2170 transitions, 55000 flow [2024-01-31 17:33:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-01-31 17:33:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-01-31 17:33:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 605 transitions. [2024-01-31 17:33:53,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34770114942528735 [2024-01-31 17:33:53,045 INFO L175 Difference]: Start difference. First operand has 619 places, 1893 transitions, 45750 flow. Second operand 60 states and 605 transitions. [2024-01-31 17:33:53,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 2170 transitions, 55000 flow Killed by 15