./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.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-bad-counter-queue2.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-bad-counter-queue2.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-bad-counter-queue2.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 17:02:09,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:02:09,675 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:02:09,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:02:09,678 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:02:09,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:02:09,699 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:02:09,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:02:09,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:02:09,700 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:02:09,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:02:09,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:02:09,701 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:02:09,701 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:02:09,701 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:02:09,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:02:09,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:02:09,702 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:02:09,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:02:09,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:02:09,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:02:09,706 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:02:09,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:02:09,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:02:09,710 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:02:09,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:02:09,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:02:09,711 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:02:09,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:02:09,712 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:02:09,712 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:02:09,713 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:02:09,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:09,713 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:02:09,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:02:09,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:02:09,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:02:09,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:02:09,714 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:02:09,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:02:09,714 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:02:09,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:02:09,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:02:09,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:02:09,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:02:09,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:02:09,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:02:09,992 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:02:09,993 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:02:09,994 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2024-01-31 17:02:11,095 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:02:11,264 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:02:11,265 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2024-01-31 17:02:11,271 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe375362/f358a7c9284b415e854168d1bc1ad8e8/FLAG977798b45 [2024-01-31 17:02:11,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe375362/f358a7c9284b415e854168d1bc1ad8e8 [2024-01-31 17:02:11,284 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:02:11,286 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:02:11,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-bad-counter-queue2.wvr.yml/witness.yml [2024-01-31 17:02:11,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:02:11,401 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:02:11,403 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:11,403 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:02:11,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:02:11,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:11" (1/2) ... [2024-01-31 17:02:11,410 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390f13ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:11, skipping insertion in model container [2024-01-31 17:02:11,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:11" (1/2) ... [2024-01-31 17:02:11,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@118c226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:11, skipping insertion in model container [2024-01-31 17:02:11,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:11" (2/2) ... [2024-01-31 17:02:11,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390f13ae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:11, skipping insertion in model container [2024-01-31 17:02:11,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:11" (2/2) ... [2024-01-31 17:02:11,412 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:02:11,447 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:02:11,466 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:02:11,617 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2024-01-31 17:02:11,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:11,663 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:02:11,680 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2024-01-31 17:02:11,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:11,708 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:02:11,709 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:11 WrapperNode [2024-01-31 17:02:11,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:11,711 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:11,711 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:02:11,711 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:02:11,718 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,733 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,766 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2024-01-31 17:02:11,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:11,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:02:11,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:02:11,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:02:11,776 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,776 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,789 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,810 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 3, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-31 17:02:11,812 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,812 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,829 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,832 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,833 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,834 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:02:11,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:02:11,836 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:02:11,836 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:02:11,837 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 05:02:11" (1/1) ... [2024-01-31 17:02:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:11,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:11,862 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 17:02:11,866 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 17:02:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:02:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:02:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:02:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:02:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:02:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:02:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:02:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:02:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:02:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:02:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:02:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:02:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:02:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:02:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:02:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:02:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:02:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:02:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:02:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:02:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:02:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:02:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:02:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:02:11,899 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 17:02:12,002 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:02:12,003 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:02:12,197 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:02:12,198 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:02:12,349 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:02:12,349 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:02:12,349 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:12 BoogieIcfgContainer [2024-01-31 17:02:12,350 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:02:12,351 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:02:12,351 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:02:12,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:02:12,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:02:11" (1/4) ... [2024-01-31 17:02:12,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a0f4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:02:12, skipping insertion in model container [2024-01-31 17:02:12,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:11" (2/4) ... [2024-01-31 17:02:12,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a0f4bc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:02:12, skipping insertion in model container [2024-01-31 17:02:12,355 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 05:02:11" (3/4) ... [2024-01-31 17:02:12,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a0f4bc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:02:12, skipping insertion in model container [2024-01-31 17:02:12,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:12" (4/4) ... [2024-01-31 17:02:12,356 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-01-31 17:02:12,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:02:12,369 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:02:12,369 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:02:12,411 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:02:12,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 64 flow [2024-01-31 17:02:12,478 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-01-31 17:02:12,481 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:02:12,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 3/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-01-31 17:02:12,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 64 flow [2024-01-31 17:02:12,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 56 flow [2024-01-31 17:02:12,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:02:12,499 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;@39d30044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:02:12,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:02:12,510 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:02:12,511 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2024-01-31 17:02:12,512 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:02:12,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:12,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:12,513 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 17:02:12,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash 380329243, now seen corresponding path program 1 times [2024-01-31 17:02:12,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:12,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717061118] [2024-01-31 17:02:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:12,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:12,871 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 17:02:12,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:12,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717061118] [2024-01-31 17:02:12,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717061118] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:12,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:12,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:02:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100950077] [2024-01-31 17:02:12,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:12,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:02:12,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:02:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:02:12,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:02:12,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 17:02:12,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:12,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:02:12,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:12,986 INFO L124 PetriNetUnfolderBase]: 100/194 cut-off events. [2024-01-31 17:02:12,986 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-01-31 17:02:12,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 194 events. 100/194 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 626 event pairs, 24 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 314. Up to 122 conditions per place. [2024-01-31 17:02:12,990 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-01-31 17:02:12,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2024-01-31 17:02:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:02:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:02:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-01-31 17:02:12,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-01-31 17:02:12,999 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 56 flow. Second operand 3 states and 47 transitions. [2024-01-31 17:02:13,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2024-01-31 17:02:13,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:02:13,004 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 67 flow [2024-01-31 17:02:13,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-01-31 17:02:13,007 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-01-31 17:02:13,008 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 67 flow [2024-01-31 17:02:13,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 17:02:13,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:13,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:13,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:02:13,009 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 17:02:13,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:13,009 INFO L85 PathProgramCache]: Analyzing trace with hash 468797561, now seen corresponding path program 1 times [2024-01-31 17:02:13,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:13,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525367736] [2024-01-31 17:02:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:13,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:13,179 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 17:02:13,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:13,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525367736] [2024-01-31 17:02:13,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525367736] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:13,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:13,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:13,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506407205] [2024-01-31 17:02:13,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:13,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:13,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:13,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:13,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:02:13,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:13,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 17:02:13,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:13,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:13,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:13,324 INFO L124 PetriNetUnfolderBase]: 184/358 cut-off events. [2024-01-31 17:02:13,324 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-01-31 17:02:13,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 358 events. 184/358 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1459 event pairs, 113 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 277. Up to 223 conditions per place. [2024-01-31 17:02:13,330 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 42 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-01-31 17:02:13,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 228 flow [2024-01-31 17:02:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-01-31 17:02:13,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-01-31 17:02:13,334 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 67 flow. Second operand 5 states and 64 transitions. [2024-01-31 17:02:13,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 228 flow [2024-01-31 17:02:13,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 49 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:13,341 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 100 flow [2024-01-31 17:02:13,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2024-01-31 17:02:13,341 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-01-31 17:02:13,345 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 100 flow [2024-01-31 17:02:13,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 17:02:13,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:13,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:13,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:02:13,346 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 17:02:13,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:13,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1254627800, now seen corresponding path program 1 times [2024-01-31 17:02:13,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:13,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101194704] [2024-01-31 17:02:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:13,494 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 17:02:13,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101194704] [2024-01-31 17:02:13,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101194704] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:13,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:13,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:13,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064083517] [2024-01-31 17:02:13,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:13,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:02:13,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:13,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 17:02:13,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:13,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:13,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:13,583 INFO L124 PetriNetUnfolderBase]: 149/292 cut-off events. [2024-01-31 17:02:13,583 INFO L125 PetriNetUnfolderBase]: For 102/111 co-relation queries the response was YES. [2024-01-31 17:02:13,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 292 events. 149/292 cut-off events. For 102/111 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1094 event pairs, 103 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 557. Up to 223 conditions per place. [2024-01-31 17:02:13,586 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 21 selfloop transitions, 2 changer transitions 17/42 dead transitions. [2024-01-31 17:02:13,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 221 flow [2024-01-31 17:02:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-01-31 17:02:13,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472 [2024-01-31 17:02:13,589 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 100 flow. Second operand 5 states and 59 transitions. [2024-01-31 17:02:13,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 221 flow [2024-01-31 17:02:13,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 42 transitions, 217 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:13,592 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 88 flow [2024-01-31 17:02:13,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2024-01-31 17:02:13,593 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2024-01-31 17:02:13,594 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 88 flow [2024-01-31 17:02:13,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 17:02:13,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:13,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:13,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:02:13,595 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 17:02:13,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1820180955, now seen corresponding path program 1 times [2024-01-31 17:02:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585131131] [2024-01-31 17:02:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585131131] [2024-01-31 17:02:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585131131] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:13,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072490205] [2024-01-31 17:02:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:13,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:13,736 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 17:02:13,738 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 17:02:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:13,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:02:13,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:13,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:13,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072490205] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:13,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:02:13,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-01-31 17:02:13,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021513213] [2024-01-31 17:02:13,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:13,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:13,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:02:13,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:13,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 17:02:13,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:13,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:13,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:13,980 INFO L124 PetriNetUnfolderBase]: 125/229 cut-off events. [2024-01-31 17:02:13,980 INFO L125 PetriNetUnfolderBase]: For 76/91 co-relation queries the response was YES. [2024-01-31 17:02:13,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 229 events. 125/229 cut-off events. For 76/91 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 781 event pairs, 35 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 593. Up to 121 conditions per place. [2024-01-31 17:02:13,981 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-01-31 17:02:13,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 181 flow [2024-01-31 17:02:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-01-31 17:02:13,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 17:02:13,983 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 88 flow. Second operand 5 states and 50 transitions. [2024-01-31 17:02:13,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 181 flow [2024-01-31 17:02:13,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 34 transitions, 157 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-01-31 17:02:13,984 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 93 flow [2024-01-31 17:02:13,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-01-31 17:02:13,985 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2024-01-31 17:02:13,985 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 93 flow [2024-01-31 17:02:13,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 17:02:13,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:13,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:14,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:14,197 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 17:02:14,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:14,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1013209238, now seen corresponding path program 1 times [2024-01-31 17:02:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414976738] [2024-01-31 17:02:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:14,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:14,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414976738] [2024-01-31 17:02:14,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414976738] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:14,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184387611] [2024-01-31 17:02:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:14,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:14,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:14,274 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 17:02:14,304 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 17:02:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:14,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:02:14,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:14,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:14,433 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 17:02:14,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184387611] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:14,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:02:14,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-01-31 17:02:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876857001] [2024-01-31 17:02:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:14,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:14,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:02:14,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:14,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 17:02:14,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:14,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:14,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:14,485 INFO L124 PetriNetUnfolderBase]: 122/226 cut-off events. [2024-01-31 17:02:14,486 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-01-31 17:02:14,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 226 events. 122/226 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 727 event pairs, 32 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 579. Up to 113 conditions per place. [2024-01-31 17:02:14,487 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-01-31 17:02:14,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 190 flow [2024-01-31 17:02:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-01-31 17:02:14,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 17:02:14,488 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 93 flow. Second operand 5 states and 50 transitions. [2024-01-31 17:02:14,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 190 flow [2024-01-31 17:02:14,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 17:02:14,489 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 110 flow [2024-01-31 17:02:14,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-01-31 17:02:14,489 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2024-01-31 17:02:14,490 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 110 flow [2024-01-31 17:02:14,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 17:02:14,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:14,490 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] [2024-01-31 17:02:14,506 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 17:02:14,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:14,707 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 17:02:14,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:14,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2136155956, now seen corresponding path program 1 times [2024-01-31 17:02:14,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:14,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229199948] [2024-01-31 17:02:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:14,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:15,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229199948] [2024-01-31 17:02:15,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229199948] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213322197] [2024-01-31 17:02:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:15,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:15,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:15,160 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 17:02:15,185 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 17:02:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:15,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 17:02:15,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:15,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:15,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:15,362 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 21 treesize of output 14 [2024-01-31 17:02:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213322197] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:15,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:15,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2024-01-31 17:02:15,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683111859] [2024-01-31 17:02:15,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:15,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:02:15,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:02:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:02:15,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:02:15,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 110 flow. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 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 17:02:15,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:15,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:02:15,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:15,670 INFO L124 PetriNetUnfolderBase]: 168/340 cut-off events. [2024-01-31 17:02:15,670 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2024-01-31 17:02:15,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 340 events. 168/340 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1311 event pairs, 27 based on Foata normal form. 2/340 useless extension candidates. Maximal degree in co-relation 955. Up to 180 conditions per place. [2024-01-31 17:02:15,672 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 45 selfloop transitions, 24 changer transitions 2/76 dead transitions. [2024-01-31 17:02:15,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 76 transitions, 428 flow [2024-01-31 17:02:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:02:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:02:15,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-01-31 17:02:15,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581818181818182 [2024-01-31 17:02:15,674 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 110 flow. Second operand 11 states and 126 transitions. [2024-01-31 17:02:15,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 76 transitions, 428 flow [2024-01-31 17:02:15,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 417 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 17:02:15,676 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 279 flow [2024-01-31 17:02:15,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-01-31 17:02:15,676 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2024-01-31 17:02:15,677 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 279 flow [2024-01-31 17:02:15,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 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 17:02:15,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:15,677 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] [2024-01-31 17:02:15,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-31 17:02:15,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:15,888 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 17:02:15,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1384415404, now seen corresponding path program 2 times [2024-01-31 17:02:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:15,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128976016] [2024-01-31 17:02:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:16,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:16,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128976016] [2024-01-31 17:02:16,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128976016] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936507473] [2024-01-31 17:02:16,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:02:16,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:16,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:16,218 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 17:02:16,252 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 17:02:16,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:02:16,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:16,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 17:02:16,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:16,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:16,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:16,403 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 21 treesize of output 14 [2024-01-31 17:02:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:16,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936507473] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:16,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:16,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-01-31 17:02:16,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242412416] [2024-01-31 17:02:16,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:16,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:02:16,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:02:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:02:16,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:02:16,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 279 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 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 17:02:16,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:16,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:02:16,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:16,725 INFO L124 PetriNetUnfolderBase]: 210/421 cut-off events. [2024-01-31 17:02:16,726 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2024-01-31 17:02:16,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 421 events. 210/421 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1781 event pairs, 36 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1433. Up to 186 conditions per place. [2024-01-31 17:02:16,728 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 38 selfloop transitions, 40 changer transitions 1/84 dead transitions. [2024-01-31 17:02:16,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 610 flow [2024-01-31 17:02:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:02:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:02:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-01-31 17:02:16,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452 [2024-01-31 17:02:16,730 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 279 flow. Second operand 10 states and 113 transitions. [2024-01-31 17:02:16,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 610 flow [2024-01-31 17:02:16,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 578 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:16,733 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 465 flow [2024-01-31 17:02:16,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=465, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2024-01-31 17:02:16,734 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2024-01-31 17:02:16,734 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 465 flow [2024-01-31 17:02:16,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 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 17:02:16,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:16,734 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] [2024-01-31 17:02:16,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:16,936 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 17:02:16,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:16,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1566706834, now seen corresponding path program 3 times [2024-01-31 17:02:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055680172] [2024-01-31 17:02:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:16,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:17,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:17,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055680172] [2024-01-31 17:02:17,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055680172] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:17,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774145842] [2024-01-31 17:02:17,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:02:17,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:17,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:17,256 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 17:02:17,257 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 17:02:17,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:02:17,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:17,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 17:02:17,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:17,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:17,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:17,425 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 17 treesize of output 14 [2024-01-31 17:02:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:17,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774145842] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:17,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:17,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-01-31 17:02:17,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126870413] [2024-01-31 17:02:17,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:17,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:02:17,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:02:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:02:17,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:02:17,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 465 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 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 17:02:17,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:17,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:02:17,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:17,758 INFO L124 PetriNetUnfolderBase]: 273/559 cut-off events. [2024-01-31 17:02:17,758 INFO L125 PetriNetUnfolderBase]: For 1141/1149 co-relation queries the response was YES. [2024-01-31 17:02:17,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2090 conditions, 559 events. 273/559 cut-off events. For 1141/1149 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2678 event pairs, 38 based on Foata normal form. 9/564 useless extension candidates. Maximal degree in co-relation 2055. Up to 210 conditions per place. [2024-01-31 17:02:17,763 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 47 selfloop transitions, 56 changer transitions 1/109 dead transitions. [2024-01-31 17:02:17,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 880 flow [2024-01-31 17:02:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:02:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:02:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-01-31 17:02:17,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2024-01-31 17:02:17,765 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 465 flow. Second operand 12 states and 136 transitions. [2024-01-31 17:02:17,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 880 flow [2024-01-31 17:02:17,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 815 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-01-31 17:02:17,772 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 665 flow [2024-01-31 17:02:17,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=665, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2024-01-31 17:02:17,774 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-01-31 17:02:17,774 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 665 flow [2024-01-31 17:02:17,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 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 17:02:17,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:17,775 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] [2024-01-31 17:02:17,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:17,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:17,987 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 17:02:17,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1654094866, now seen corresponding path program 4 times [2024-01-31 17:02:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:17,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777610576] [2024-01-31 17:02:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:17,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:18,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:18,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777610576] [2024-01-31 17:02:18,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777610576] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:18,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686542848] [2024-01-31 17:02:18,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:02:18,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:18,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:18,257 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 17:02:18,259 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 17:02:18,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:02:18,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:18,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 17:02:18,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:18,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:18,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:18,400 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 21 treesize of output 14 [2024-01-31 17:02:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:18,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686542848] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:18,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:18,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-01-31 17:02:18,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780663503] [2024-01-31 17:02:18,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:18,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:02:18,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:02:18,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:02:18,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:02:18,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 665 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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 17:02:18,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:18,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:02:18,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:18,707 INFO L124 PetriNetUnfolderBase]: 315/637 cut-off events. [2024-01-31 17:02:18,707 INFO L125 PetriNetUnfolderBase]: For 1458/1458 co-relation queries the response was YES. [2024-01-31 17:02:18,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2498 conditions, 637 events. 315/637 cut-off events. For 1458/1458 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3170 event pairs, 77 based on Foata normal form. 1/634 useless extension candidates. Maximal degree in co-relation 2461. Up to 473 conditions per place. [2024-01-31 17:02:18,711 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 77 selfloop transitions, 22 changer transitions 1/105 dead transitions. [2024-01-31 17:02:18,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 990 flow [2024-01-31 17:02:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:02:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:02:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-01-31 17:02:18,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-01-31 17:02:18,712 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 665 flow. Second operand 9 states and 99 transitions. [2024-01-31 17:02:18,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 990 flow [2024-01-31 17:02:18,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 948 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-01-31 17:02:18,717 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 770 flow [2024-01-31 17:02:18,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=770, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-01-31 17:02:18,717 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-01-31 17:02:18,717 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 770 flow [2024-01-31 17:02:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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 17:02:18,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:18,718 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] [2024-01-31 17:02:18,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 17:02:18,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:18,930 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 17:02:18,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1453233878, now seen corresponding path program 5 times [2024-01-31 17:02:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:18,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802958342] [2024-01-31 17:02:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802958342] [2024-01-31 17:02:19,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802958342] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427086512] [2024-01-31 17:02:19,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:02:19,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:19,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:19,214 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 17:02:19,232 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 17:02:19,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:02:19,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:19,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:02:19,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:19,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:19,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:19,374 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 21 treesize of output 14 [2024-01-31 17:02:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:19,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427086512] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:19,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:19,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2024-01-31 17:02:19,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601848444] [2024-01-31 17:02:19,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:19,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:02:19,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:02:19,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:02:19,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:02:19,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 770 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 17:02:19,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:19,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:02:19,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:19,754 INFO L124 PetriNetUnfolderBase]: 351/716 cut-off events. [2024-01-31 17:02:19,754 INFO L125 PetriNetUnfolderBase]: For 1782/1782 co-relation queries the response was YES. [2024-01-31 17:02:19,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 716 events. 351/716 cut-off events. For 1782/1782 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3756 event pairs, 82 based on Foata normal form. 1/713 useless extension candidates. Maximal degree in co-relation 2790. Up to 477 conditions per place. [2024-01-31 17:02:19,759 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 79 selfloop transitions, 36 changer transitions 1/121 dead transitions. [2024-01-31 17:02:19,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 1157 flow [2024-01-31 17:02:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:02:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:02:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-01-31 17:02:19,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444 [2024-01-31 17:02:19,760 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 770 flow. Second operand 10 states and 111 transitions. [2024-01-31 17:02:19,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 1157 flow [2024-01-31 17:02:19,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 1145 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-31 17:02:19,765 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 950 flow [2024-01-31 17:02:19,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=950, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-01-31 17:02:19,766 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 56 predicate places. [2024-01-31 17:02:19,766 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 950 flow [2024-01-31 17:02:19,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 17:02:19,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:19,766 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] [2024-01-31 17:02:19,780 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 17:02:19,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:19,978 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 17:02:19,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1062076604, now seen corresponding path program 6 times [2024-01-31 17:02:19,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:19,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116567900] [2024-01-31 17:02:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:19,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:20,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:20,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116567900] [2024-01-31 17:02:20,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116567900] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:20,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456697631] [2024-01-31 17:02:20,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:02:20,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:20,249 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 17:02:20,278 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 17:02:20,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:02:20,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:20,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 17:02:20,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:20,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:20,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:20,412 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 17 treesize of output 14 [2024-01-31 17:02:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456697631] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:20,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 15 [2024-01-31 17:02:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821855781] [2024-01-31 17:02:20,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:20,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:02:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:20,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:02:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:02:20,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:02:20,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 950 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 17:02:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:02:20,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:20,768 INFO L124 PetriNetUnfolderBase]: 407/817 cut-off events. [2024-01-31 17:02:20,768 INFO L125 PetriNetUnfolderBase]: For 2522/2526 co-relation queries the response was YES. [2024-01-31 17:02:20,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 817 events. 407/817 cut-off events. For 2522/2526 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4324 event pairs, 84 based on Foata normal form. 5/820 useless extension candidates. Maximal degree in co-relation 3377. Up to 495 conditions per place. [2024-01-31 17:02:20,773 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 82 selfloop transitions, 52 changer transitions 1/140 dead transitions. [2024-01-31 17:02:20,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 140 transitions, 1439 flow [2024-01-31 17:02:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:02:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:02:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-01-31 17:02:20,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-01-31 17:02:20,774 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 950 flow. Second operand 12 states and 128 transitions. [2024-01-31 17:02:20,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 140 transitions, 1439 flow [2024-01-31 17:02:20,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 140 transitions, 1373 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-01-31 17:02:20,783 INFO L231 Difference]: Finished difference. Result has 92 places, 117 transitions, 1170 flow [2024-01-31 17:02:20,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1170, PETRI_PLACES=92, PETRI_TRANSITIONS=117} [2024-01-31 17:02:20,783 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 66 predicate places. [2024-01-31 17:02:20,784 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 117 transitions, 1170 flow [2024-01-31 17:02:20,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 17:02:20,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:20,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:20,798 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 17:02:20,996 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,SelfDestructingSolverStorable10 [2024-01-31 17:02:20,996 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 17:02:20,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash 170566836, now seen corresponding path program 7 times [2024-01-31 17:02:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:20,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762902351] [2024-01-31 17:02:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:20,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762902351] [2024-01-31 17:02:21,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762902351] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097204223] [2024-01-31 17:02:21,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:02:21,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:21,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:21,066 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 17:02:21,086 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 17:02:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:21,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:02:21,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:21,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:21,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097204223] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:21,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:21,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:02:21,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408246793] [2024-01-31 17:02:21,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:21,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:02:21,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:21,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:02:21,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:02:21,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:21,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 117 transitions, 1170 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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 17:02:21,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:21,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:21,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:21,539 INFO L124 PetriNetUnfolderBase]: 907/1752 cut-off events. [2024-01-31 17:02:21,539 INFO L125 PetriNetUnfolderBase]: For 5999/6003 co-relation queries the response was YES. [2024-01-31 17:02:21,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7457 conditions, 1752 events. 907/1752 cut-off events. For 5999/6003 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10595 event pairs, 408 based on Foata normal form. 62/1814 useless extension candidates. Maximal degree in co-relation 5632. Up to 928 conditions per place. [2024-01-31 17:02:21,548 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 209 selfloop transitions, 26 changer transitions 0/238 dead transitions. [2024-01-31 17:02:21,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 238 transitions, 2840 flow [2024-01-31 17:02:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:02:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:02:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-01-31 17:02:21,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-01-31 17:02:21,549 INFO L175 Difference]: Start difference. First operand has 92 places, 117 transitions, 1170 flow. Second operand 7 states and 83 transitions. [2024-01-31 17:02:21,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 238 transitions, 2840 flow [2024-01-31 17:02:21,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 238 transitions, 2738 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-01-31 17:02:21,561 INFO L231 Difference]: Finished difference. Result has 99 places, 141 transitions, 1542 flow [2024-01-31 17:02:21,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1542, PETRI_PLACES=99, PETRI_TRANSITIONS=141} [2024-01-31 17:02:21,562 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 73 predicate places. [2024-01-31 17:02:21,562 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 141 transitions, 1542 flow [2024-01-31 17:02:21,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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 17:02:21,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:21,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:21,586 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 17:02:21,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:21,774 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 17:02:21,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1329924051, now seen corresponding path program 8 times [2024-01-31 17:02:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:21,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109174666] [2024-01-31 17:02:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:21,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:21,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:21,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109174666] [2024-01-31 17:02:21,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109174666] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:21,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384646565] [2024-01-31 17:02:21,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:02:21,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:21,847 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 17:02:21,876 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 17:02:21,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:02:21,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:21,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:02:21,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:22,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384646565] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:22,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:22,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:02:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799732181] [2024-01-31 17:02:22,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:22,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:02:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:02:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:02:22,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:22,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 141 transitions, 1542 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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 17:02:22,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:22,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:22,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:22,358 INFO L124 PetriNetUnfolderBase]: 803/1556 cut-off events. [2024-01-31 17:02:22,358 INFO L125 PetriNetUnfolderBase]: For 6011/6055 co-relation queries the response was YES. [2024-01-31 17:02:22,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6909 conditions, 1556 events. 803/1556 cut-off events. For 6011/6055 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9253 event pairs, 398 based on Foata normal form. 62/1616 useless extension candidates. Maximal degree in co-relation 5512. Up to 965 conditions per place. [2024-01-31 17:02:22,367 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 112 selfloop transitions, 3 changer transitions 85/203 dead transitions. [2024-01-31 17:02:22,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 203 transitions, 2523 flow [2024-01-31 17:02:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:02:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:02:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-01-31 17:02:22,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2024-01-31 17:02:22,369 INFO L175 Difference]: Start difference. First operand has 99 places, 141 transitions, 1542 flow. Second operand 7 states and 82 transitions. [2024-01-31 17:02:22,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 203 transitions, 2523 flow [2024-01-31 17:02:22,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 203 transitions, 2507 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-31 17:02:22,395 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 1226 flow [2024-01-31 17:02:22,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-01-31 17:02:22,396 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 80 predicate places. [2024-01-31 17:02:22,397 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 1226 flow [2024-01-31 17:02:22,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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 17:02:22,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:22,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:22,411 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 17:02:22,608 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,SelfDestructingSolverStorable12 [2024-01-31 17:02:22,610 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 17:02:22,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1518914974, now seen corresponding path program 9 times [2024-01-31 17:02:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:22,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665655632] [2024-01-31 17:02:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:02:22,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:22,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665655632] [2024-01-31 17:02:22,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665655632] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:22,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020783708] [2024-01-31 17:02:22,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:02:22,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:22,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:22,716 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 17:02:22,744 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 17:02:22,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:02:22,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:22,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:02:22,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:02:22,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:02:22,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020783708] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:22,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:22,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:02:22,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714395615] [2024-01-31 17:02:22,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:22,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:02:22,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:22,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:02:22,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:02:22,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:22,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 1226 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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 17:02:22,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:22,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:22,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:23,145 INFO L124 PetriNetUnfolderBase]: 528/964 cut-off events. [2024-01-31 17:02:23,145 INFO L125 PetriNetUnfolderBase]: For 3655/3701 co-relation queries the response was YES. [2024-01-31 17:02:23,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4474 conditions, 964 events. 528/964 cut-off events. For 3655/3701 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4753 event pairs, 79 based on Foata normal form. 70/1033 useless extension candidates. Maximal degree in co-relation 4427. Up to 421 conditions per place. [2024-01-31 17:02:23,151 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 111 selfloop transitions, 29 changer transitions 0/143 dead transitions. [2024-01-31 17:02:23,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 143 transitions, 1659 flow [2024-01-31 17:02:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:02:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:02:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-01-31 17:02:23,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38222222222222224 [2024-01-31 17:02:23,152 INFO L175 Difference]: Start difference. First operand has 106 places, 118 transitions, 1226 flow. Second operand 9 states and 86 transitions. [2024-01-31 17:02:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 143 transitions, 1659 flow [2024-01-31 17:02:23,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 143 transitions, 1495 flow, removed 59 selfloop flow, removed 12 redundant places. [2024-01-31 17:02:23,163 INFO L231 Difference]: Finished difference. Result has 98 places, 121 transitions, 1192 flow [2024-01-31 17:02:23,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1192, PETRI_PLACES=98, PETRI_TRANSITIONS=121} [2024-01-31 17:02:23,165 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 72 predicate places. [2024-01-31 17:02:23,165 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 121 transitions, 1192 flow [2024-01-31 17:02:23,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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 17:02:23,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:23,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:23,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-31 17:02:23,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 17:02:23,376 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 17:02:23,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1877184865, now seen corresponding path program 10 times [2024-01-31 17:02:23,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:23,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087193497] [2024-01-31 17:02:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:23,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:02:23,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:23,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087193497] [2024-01-31 17:02:23,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087193497] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:23,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480919679] [2024-01-31 17:02:23,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:02:23,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:23,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:23,459 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:23,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 17:02:23,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:02:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:23,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:02:23,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:23,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:23,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480919679] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:23,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:23,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:02:23,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252280691] [2024-01-31 17:02:23,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:23,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:02:23,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:23,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:02:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:02:23,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:02:23,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 121 transitions, 1192 flow. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 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 17:02:23,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:23,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:02:23,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:23,931 INFO L124 PetriNetUnfolderBase]: 646/1097 cut-off events. [2024-01-31 17:02:23,931 INFO L125 PetriNetUnfolderBase]: For 3330/3330 co-relation queries the response was YES. [2024-01-31 17:02:23,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4934 conditions, 1097 events. 646/1097 cut-off events. For 3330/3330 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4689 event pairs, 144 based on Foata normal form. 68/1165 useless extension candidates. Maximal degree in co-relation 4879. Up to 435 conditions per place. [2024-01-31 17:02:23,939 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 131 selfloop transitions, 28 changer transitions 0/160 dead transitions. [2024-01-31 17:02:23,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1782 flow [2024-01-31 17:02:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:02:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:02:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2024-01-31 17:02:23,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-01-31 17:02:23,941 INFO L175 Difference]: Start difference. First operand has 98 places, 121 transitions, 1192 flow. Second operand 9 states and 81 transitions. [2024-01-31 17:02:23,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1782 flow [2024-01-31 17:02:23,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 160 transitions, 1760 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-31 17:02:23,952 INFO L231 Difference]: Finished difference. Result has 103 places, 124 transitions, 1283 flow [2024-01-31 17:02:23,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=103, PETRI_TRANSITIONS=124} [2024-01-31 17:02:23,953 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 77 predicate places. [2024-01-31 17:02:23,953 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 124 transitions, 1283 flow [2024-01-31 17:02:23,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 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 17:02:23,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:23,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:23,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:24,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:02:24,165 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 17:02:24,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:24,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1815258673, now seen corresponding path program 11 times [2024-01-31 17:02:24,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:24,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935000466] [2024-01-31 17:02:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:24,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:24,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935000466] [2024-01-31 17:02:24,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935000466] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818985917] [2024-01-31 17:02:24,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:02:24,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:24,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:24,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 17:02:24,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:02:24,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:24,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:02:24,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:24,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:24,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:24,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-01-31 17:02:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:25,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818985917] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:25,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:25,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2024-01-31 17:02:25,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287119062] [2024-01-31 17:02:25,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:25,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:02:25,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:25,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:02:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:02:25,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:25,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 124 transitions, 1283 flow. Second operand has 28 states, 28 states have (on average 6.142857142857143) internal successors, (172), 28 states have internal predecessors, (172), 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 17:02:25,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:25,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:25,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:26,225 INFO L124 PetriNetUnfolderBase]: 632/1208 cut-off events. [2024-01-31 17:02:26,226 INFO L125 PetriNetUnfolderBase]: For 4062/4066 co-relation queries the response was YES. [2024-01-31 17:02:26,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5575 conditions, 1208 events. 632/1208 cut-off events. For 4062/4066 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6166 event pairs, 21 based on Foata normal form. 5/1213 useless extension candidates. Maximal degree in co-relation 5518. Up to 661 conditions per place. [2024-01-31 17:02:26,239 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 154 selfloop transitions, 80 changer transitions 1/239 dead transitions. [2024-01-31 17:02:26,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 239 transitions, 2372 flow [2024-01-31 17:02:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:02:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:02:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 258 transitions. [2024-01-31 17:02:26,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39692307692307693 [2024-01-31 17:02:26,242 INFO L175 Difference]: Start difference. First operand has 103 places, 124 transitions, 1283 flow. Second operand 26 states and 258 transitions. [2024-01-31 17:02:26,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 239 transitions, 2372 flow [2024-01-31 17:02:26,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 239 transitions, 2365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:02:26,260 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1793 flow [2024-01-31 17:02:26,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1793, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2024-01-31 17:02:26,261 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 104 predicate places. [2024-01-31 17:02:26,261 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1793 flow [2024-01-31 17:02:26,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.142857142857143) internal successors, (172), 28 states have internal predecessors, (172), 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 17:02:26,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:26,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:26,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:26,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:02:26,474 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:26,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1092200439, now seen corresponding path program 12 times [2024-01-31 17:02:26,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:26,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016432226] [2024-01-31 17:02:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016432226] [2024-01-31 17:02:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016432226] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18000629] [2024-01-31 17:02:27,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:02:27,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:27,129 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:27,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 17:02:27,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:02:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:27,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:02:27,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:27,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:27,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:27,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-01-31 17:02:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:27,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18000629] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:27,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:27,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2024-01-31 17:02:27,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264714225] [2024-01-31 17:02:27,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:27,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:02:27,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:27,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:02:27,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:02:27,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:27,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1793 flow. Second operand has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 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 17:02:27,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:27,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:27,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:28,717 INFO L124 PetriNetUnfolderBase]: 821/1559 cut-off events. [2024-01-31 17:02:28,717 INFO L125 PetriNetUnfolderBase]: For 6975/6975 co-relation queries the response was YES. [2024-01-31 17:02:28,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7902 conditions, 1559 events. 821/1559 cut-off events. For 6975/6975 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8601 event pairs, 89 based on Foata normal form. 1/1558 useless extension candidates. Maximal degree in co-relation 7838. Up to 907 conditions per place. [2024-01-31 17:02:28,738 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 149 selfloop transitions, 99 changer transitions 1/253 dead transitions. [2024-01-31 17:02:28,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 253 transitions, 2918 flow [2024-01-31 17:02:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 17:02:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 17:02:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 221 transitions. [2024-01-31 17:02:28,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843478260869565 [2024-01-31 17:02:28,741 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1793 flow. Second operand 23 states and 221 transitions. [2024-01-31 17:02:28,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 253 transitions, 2918 flow [2024-01-31 17:02:28,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 253 transitions, 2720 flow, removed 65 selfloop flow, removed 11 redundant places. [2024-01-31 17:02:28,764 INFO L231 Difference]: Finished difference. Result has 150 places, 194 transitions, 2273 flow [2024-01-31 17:02:28,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2273, PETRI_PLACES=150, PETRI_TRANSITIONS=194} [2024-01-31 17:02:28,765 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 124 predicate places. [2024-01-31 17:02:28,765 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 194 transitions, 2273 flow [2024-01-31 17:02:28,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 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 17:02:28,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:28,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:28,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:28,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:28,979 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:28,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash -511927173, now seen corresponding path program 13 times [2024-01-31 17:02:28,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:28,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329735092] [2024-01-31 17:02:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:28,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329735092] [2024-01-31 17:02:29,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329735092] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974040265] [2024-01-31 17:02:29,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:02:29,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:29,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:29,557 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:29,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:02:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:29,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:02:29,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:29,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:29,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:29,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-01-31 17:02:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974040265] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:29,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:29,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-31 17:02:29,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428706589] [2024-01-31 17:02:29,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:29,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:02:29,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:29,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:02:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:02:30,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:02:30,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 194 transitions, 2273 flow. Second operand has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 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 17:02:30,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:30,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:02:30,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:31,223 INFO L124 PetriNetUnfolderBase]: 1306/2229 cut-off events. [2024-01-31 17:02:31,223 INFO L125 PetriNetUnfolderBase]: For 11659/11659 co-relation queries the response was YES. [2024-01-31 17:02:31,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11715 conditions, 2229 events. 1306/2229 cut-off events. For 11659/11659 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11399 event pairs, 218 based on Foata normal form. 1/2230 useless extension candidates. Maximal degree in co-relation 11642. Up to 1696 conditions per place. [2024-01-31 17:02:31,239 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 195 selfloop transitions, 90 changer transitions 1/287 dead transitions. [2024-01-31 17:02:31,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 287 transitions, 3447 flow [2024-01-31 17:02:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:02:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:02:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 236 transitions. [2024-01-31 17:02:31,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255172413793103 [2024-01-31 17:02:31,241 INFO L175 Difference]: Start difference. First operand has 150 places, 194 transitions, 2273 flow. Second operand 29 states and 236 transitions. [2024-01-31 17:02:31,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 287 transitions, 3447 flow [2024-01-31 17:02:31,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 287 transitions, 3360 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-01-31 17:02:31,273 INFO L231 Difference]: Finished difference. Result has 174 places, 215 transitions, 2749 flow [2024-01-31 17:02:31,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2749, PETRI_PLACES=174, PETRI_TRANSITIONS=215} [2024-01-31 17:02:31,273 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 148 predicate places. [2024-01-31 17:02:31,274 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 215 transitions, 2749 flow [2024-01-31 17:02:31,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 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 17:02:31,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:31,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:31,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:31,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 17:02:31,487 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:31,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 239479287, now seen corresponding path program 14 times [2024-01-31 17:02:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:31,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768945320] [2024-01-31 17:02:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:31,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:32,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:32,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768945320] [2024-01-31 17:02:32,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768945320] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:32,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199904581] [2024-01-31 17:02:32,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:02:32,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:32,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:32,110 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:32,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 17:02:32,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:02:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:32,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 17:02:32,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:32,241 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 17:02:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:32,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:32,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199904581] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:32,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:32,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 33 [2024-01-31 17:02:32,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484958054] [2024-01-31 17:02:32,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:32,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:02:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:02:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:02:32,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:02:32,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 215 transitions, 2749 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 17:02:32,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:32,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:02:32,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:33,897 INFO L124 PetriNetUnfolderBase]: 1495/2549 cut-off events. [2024-01-31 17:02:33,898 INFO L125 PetriNetUnfolderBase]: For 16314/16314 co-relation queries the response was YES. [2024-01-31 17:02:33,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14244 conditions, 2549 events. 1495/2549 cut-off events. For 16314/16314 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13488 event pairs, 258 based on Foata normal form. 1/2550 useless extension candidates. Maximal degree in co-relation 14165. Up to 1822 conditions per place. [2024-01-31 17:02:33,912 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 195 selfloop transitions, 134 changer transitions 1/331 dead transitions. [2024-01-31 17:02:33,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 331 transitions, 4368 flow [2024-01-31 17:02:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:02:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:02:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 232 transitions. [2024-01-31 17:02:33,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569230769230769 [2024-01-31 17:02:33,915 INFO L175 Difference]: Start difference. First operand has 174 places, 215 transitions, 2749 flow. Second operand 26 states and 232 transitions. [2024-01-31 17:02:33,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 331 transitions, 4368 flow [2024-01-31 17:02:33,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 331 transitions, 4196 flow, removed 45 selfloop flow, removed 18 redundant places. [2024-01-31 17:02:33,956 INFO L231 Difference]: Finished difference. Result has 190 places, 262 transitions, 3613 flow [2024-01-31 17:02:33,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3613, PETRI_PLACES=190, PETRI_TRANSITIONS=262} [2024-01-31 17:02:33,956 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 164 predicate places. [2024-01-31 17:02:33,956 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 262 transitions, 3613 flow [2024-01-31 17:02:33,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 17:02:33,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:33,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:33,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-31 17:02:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:34,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:34,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1032926911, now seen corresponding path program 15 times [2024-01-31 17:02:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:34,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049810615] [2024-01-31 17:02:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:34,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049810615] [2024-01-31 17:02:34,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049810615] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:34,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253347281] [2024-01-31 17:02:34,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:02:34,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:34,721 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:34,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 17:02:34,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:02:34,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:34,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 17:02:34,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:34,852 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 17:02:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:35,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253347281] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:35,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 32 [2024-01-31 17:02:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452638342] [2024-01-31 17:02:35,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 17:02:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 17:02:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 17:02:35,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:35,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 262 transitions, 3613 flow. Second operand has 33 states, 33 states have (on average 6.0) internal successors, (198), 33 states have internal predecessors, (198), 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 17:02:35,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:35,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:35,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:36,261 INFO L124 PetriNetUnfolderBase]: 1136/2141 cut-off events. [2024-01-31 17:02:36,261 INFO L125 PetriNetUnfolderBase]: For 19337/19340 co-relation queries the response was YES. [2024-01-31 17:02:36,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13561 conditions, 2141 events. 1136/2141 cut-off events. For 19337/19340 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12842 event pairs, 180 based on Foata normal form. 3/2124 useless extension candidates. Maximal degree in co-relation 13474. Up to 1489 conditions per place. [2024-01-31 17:02:36,279 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 205 selfloop transitions, 117 changer transitions 1/328 dead transitions. [2024-01-31 17:02:36,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 328 transitions, 4823 flow [2024-01-31 17:02:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:02:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:02:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 210 transitions. [2024-01-31 17:02:36,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-01-31 17:02:36,281 INFO L175 Difference]: Start difference. First operand has 190 places, 262 transitions, 3613 flow. Second operand 22 states and 210 transitions. [2024-01-31 17:02:36,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 328 transitions, 4823 flow [2024-01-31 17:02:36,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 328 transitions, 4546 flow, removed 69 selfloop flow, removed 13 redundant places. [2024-01-31 17:02:36,348 INFO L231 Difference]: Finished difference. Result has 201 places, 275 transitions, 3839 flow [2024-01-31 17:02:36,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3839, PETRI_PLACES=201, PETRI_TRANSITIONS=275} [2024-01-31 17:02:36,349 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 175 predicate places. [2024-01-31 17:02:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 275 transitions, 3839 flow [2024-01-31 17:02:36,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.0) internal successors, (198), 33 states have internal predecessors, (198), 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 17:02:36,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:36,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:36,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:36,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:36,563 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:36,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1832833799, now seen corresponding path program 16 times [2024-01-31 17:02:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:36,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259361347] [2024-01-31 17:02:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:37,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:37,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259361347] [2024-01-31 17:02:37,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259361347] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:37,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061648328] [2024-01-31 17:02:37,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:02:37,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:37,177 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:37,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 17:02:37,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:02:37,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:37,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:02:37,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:37,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:37,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:37,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-01-31 17:02:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:37,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061648328] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:37,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:37,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-31 17:02:37,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573615553] [2024-01-31 17:02:37,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:37,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:02:37,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:02:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:02:37,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:02:37,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 275 transitions, 3839 flow. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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 17:02:37,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:37,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:02:37,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:39,393 INFO L124 PetriNetUnfolderBase]: 2054/3486 cut-off events. [2024-01-31 17:02:39,393 INFO L125 PetriNetUnfolderBase]: For 29250/29250 co-relation queries the response was YES. [2024-01-31 17:02:39,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21426 conditions, 3486 events. 2054/3486 cut-off events. For 29250/29250 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19733 event pairs, 208 based on Foata normal form. 1/3487 useless extension candidates. Maximal degree in co-relation 21337. Up to 2099 conditions per place. [2024-01-31 17:02:39,453 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 280 selfloop transitions, 209 changer transitions 1/491 dead transitions. [2024-01-31 17:02:39,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 491 transitions, 6984 flow [2024-01-31 17:02:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 17:02:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 17:02:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 279 transitions. [2024-01-31 17:02:39,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34875 [2024-01-31 17:02:39,462 INFO L175 Difference]: Start difference. First operand has 201 places, 275 transitions, 3839 flow. Second operand 32 states and 279 transitions. [2024-01-31 17:02:39,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 491 transitions, 6984 flow [2024-01-31 17:02:39,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 491 transitions, 6695 flow, removed 68 selfloop flow, removed 16 redundant places. [2024-01-31 17:02:39,539 INFO L231 Difference]: Finished difference. Result has 226 places, 383 transitions, 5727 flow [2024-01-31 17:02:39,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5727, PETRI_PLACES=226, PETRI_TRANSITIONS=383} [2024-01-31 17:02:39,540 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 200 predicate places. [2024-01-31 17:02:39,540 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 383 transitions, 5727 flow [2024-01-31 17:02:39,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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 17:02:39,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:39,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:39,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:39,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:39,751 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:39,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 305098119, now seen corresponding path program 17 times [2024-01-31 17:02:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919876982] [2024-01-31 17:02:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:39,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:40,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:40,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919876982] [2024-01-31 17:02:40,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919876982] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:40,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793700204] [2024-01-31 17:02:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:02:40,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:40,328 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:40,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 17:02:40,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:02:40,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:40,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:02:40,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:40,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:40,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:40,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-01-31 17:02:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:40,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793700204] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:40,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:40,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-31 17:02:40,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395359108] [2024-01-31 17:02:40,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:40,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:02:40,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:02:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:02:40,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:02:40,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 383 transitions, 5727 flow. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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 17:02:40,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:40,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:02:40,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:42,421 INFO L124 PetriNetUnfolderBase]: 2363/3998 cut-off events. [2024-01-31 17:02:42,421 INFO L125 PetriNetUnfolderBase]: For 40053/40053 co-relation queries the response was YES. [2024-01-31 17:02:42,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27298 conditions, 3998 events. 2363/3998 cut-off events. For 40053/40053 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23113 event pairs, 240 based on Foata normal form. 1/3999 useless extension candidates. Maximal degree in co-relation 27198. Up to 2353 conditions per place. [2024-01-31 17:02:42,454 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 304 selfloop transitions, 248 changer transitions 1/554 dead transitions. [2024-01-31 17:02:42,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 554 transitions, 8706 flow [2024-01-31 17:02:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 17:02:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 17:02:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 262 transitions. [2024-01-31 17:02:42,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34933333333333333 [2024-01-31 17:02:42,469 INFO L175 Difference]: Start difference. First operand has 226 places, 383 transitions, 5727 flow. Second operand 30 states and 262 transitions. [2024-01-31 17:02:42,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 554 transitions, 8706 flow [2024-01-31 17:02:42,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 554 transitions, 8419 flow, removed 126 selfloop flow, removed 9 redundant places. [2024-01-31 17:02:42,604 INFO L231 Difference]: Finished difference. Result has 259 places, 445 transitions, 7369 flow [2024-01-31 17:02:42,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5476, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7369, PETRI_PLACES=259, PETRI_TRANSITIONS=445} [2024-01-31 17:02:42,605 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 233 predicate places. [2024-01-31 17:02:42,605 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 445 transitions, 7369 flow [2024-01-31 17:02:42,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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 17:02:42,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:42,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:42,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:42,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:42,810 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:42,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:42,810 INFO L85 PathProgramCache]: Analyzing trace with hash -832652345, now seen corresponding path program 18 times [2024-01-31 17:02:42,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:42,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894331648] [2024-01-31 17:02:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:42,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894331648] [2024-01-31 17:02:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894331648] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259599570] [2024-01-31 17:02:43,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:02:43,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:43,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:43,378 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:43,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 17:02:43,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:02:43,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:43,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:02:43,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:43,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:43,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:43,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-01-31 17:02:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:43,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259599570] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:43,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:43,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-01-31 17:02:43,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173976026] [2024-01-31 17:02:43,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:43,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 17:02:43,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 17:02:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 17:02:43,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:02:43,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 445 transitions, 7369 flow. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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 17:02:43,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:43,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:02:43,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:45,652 INFO L124 PetriNetUnfolderBase]: 2644/4465 cut-off events. [2024-01-31 17:02:45,653 INFO L125 PetriNetUnfolderBase]: For 59798/59798 co-relation queries the response was YES. [2024-01-31 17:02:45,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33973 conditions, 4465 events. 2644/4465 cut-off events. For 59798/59798 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 26021 event pairs, 272 based on Foata normal form. 2/4467 useless extension candidates. Maximal degree in co-relation 33859. Up to 2667 conditions per place. [2024-01-31 17:02:45,693 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 339 selfloop transitions, 273 changer transitions 2/615 dead transitions. [2024-01-31 17:02:45,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 615 transitions, 10682 flow [2024-01-31 17:02:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 17:02:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 17:02:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 300 transitions. [2024-01-31 17:02:45,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2024-01-31 17:02:45,694 INFO L175 Difference]: Start difference. First operand has 259 places, 445 transitions, 7369 flow. Second operand 34 states and 300 transitions. [2024-01-31 17:02:45,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 615 transitions, 10682 flow [2024-01-31 17:02:45,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 615 transitions, 10351 flow, removed 121 selfloop flow, removed 16 redundant places. [2024-01-31 17:02:45,941 INFO L231 Difference]: Finished difference. Result has 285 places, 496 transitions, 8906 flow [2024-01-31 17:02:45,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7052, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8906, PETRI_PLACES=285, PETRI_TRANSITIONS=496} [2024-01-31 17:02:45,942 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 259 predicate places. [2024-01-31 17:02:45,942 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 496 transitions, 8906 flow [2024-01-31 17:02:45,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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 17:02:45,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:45,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:45,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:46,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-31 17:02:46,158 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:46,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 480178763, now seen corresponding path program 19 times [2024-01-31 17:02:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999548572] [2024-01-31 17:02:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:46,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:46,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999548572] [2024-01-31 17:02:46,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999548572] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:46,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114676910] [2024-01-31 17:02:46,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:02:46,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:46,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:46,600 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:46,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 17:02:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:46,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:02:46,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:46,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:46,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:46,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-01-31 17:02:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:47,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114676910] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:47,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:47,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-31 17:02:47,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163352828] [2024-01-31 17:02:47,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:47,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:02:47,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:47,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:02:47,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:02:47,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:02:47,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 496 transitions, 8906 flow. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 17:02:47,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:47,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:02:47,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:48,543 INFO L124 PetriNetUnfolderBase]: 2222/4002 cut-off events. [2024-01-31 17:02:48,544 INFO L125 PetriNetUnfolderBase]: For 65852/65882 co-relation queries the response was YES. [2024-01-31 17:02:48,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33218 conditions, 4002 events. 2222/4002 cut-off events. For 65852/65882 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25262 event pairs, 312 based on Foata normal form. 13/4001 useless extension candidates. Maximal degree in co-relation 33095. Up to 3385 conditions per place. [2024-01-31 17:02:48,574 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 463 selfloop transitions, 82 changer transitions 1/559 dead transitions. [2024-01-31 17:02:48,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 559 transitions, 10703 flow [2024-01-31 17:02:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 17:02:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 17:02:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 214 transitions. [2024-01-31 17:02:48,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3566666666666667 [2024-01-31 17:02:48,576 INFO L175 Difference]: Start difference. First operand has 285 places, 496 transitions, 8906 flow. Second operand 24 states and 214 transitions. [2024-01-31 17:02:48,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 559 transitions, 10703 flow [2024-01-31 17:02:48,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 559 transitions, 10154 flow, removed 216 selfloop flow, removed 19 redundant places. [2024-01-31 17:02:48,865 INFO L231 Difference]: Finished difference. Result has 290 places, 506 transitions, 8801 flow [2024-01-31 17:02:48,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8359, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8801, PETRI_PLACES=290, PETRI_TRANSITIONS=506} [2024-01-31 17:02:48,872 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 264 predicate places. [2024-01-31 17:02:48,872 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 506 transitions, 8801 flow [2024-01-31 17:02:48,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 17:02:48,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:48,873 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:48,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-31 17:02:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-31 17:02:49,077 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:49,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 752230821, now seen corresponding path program 20 times [2024-01-31 17:02:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191330814] [2024-01-31 17:02:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:49,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:49,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191330814] [2024-01-31 17:02:49,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191330814] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:49,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570555713] [2024-01-31 17:02:49,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:02:49,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:49,512 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:49,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 17:02:49,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:02:49,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:49,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:02:49,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:49,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:49,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:49,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-01-31 17:02:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:49,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570555713] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:49,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:49,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-01-31 17:02:49,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2851870] [2024-01-31 17:02:49,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:49,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 17:02:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 17:02:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 17:02:50,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:02:50,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 506 transitions, 8801 flow. Second operand has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 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 17:02:50,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:50,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:02:50,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:51,822 INFO L124 PetriNetUnfolderBase]: 2892/4885 cut-off events. [2024-01-31 17:02:51,822 INFO L125 PetriNetUnfolderBase]: For 78663/78663 co-relation queries the response was YES. [2024-01-31 17:02:51,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39522 conditions, 4885 events. 2892/4885 cut-off events. For 78663/78663 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 28945 event pairs, 538 based on Foata normal form. 1/4886 useless extension candidates. Maximal degree in co-relation 39398. Up to 4305 conditions per place. [2024-01-31 17:02:51,872 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 492 selfloop transitions, 98 changer transitions 1/592 dead transitions. [2024-01-31 17:02:51,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 592 transitions, 11003 flow [2024-01-31 17:02:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:02:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:02:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 196 transitions. [2024-01-31 17:02:51,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563636363636364 [2024-01-31 17:02:51,875 INFO L175 Difference]: Start difference. First operand has 290 places, 506 transitions, 8801 flow. Second operand 22 states and 196 transitions. [2024-01-31 17:02:51,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 592 transitions, 11003 flow [2024-01-31 17:02:52,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 592 transitions, 10798 flow, removed 65 selfloop flow, removed 15 redundant places. [2024-01-31 17:02:52,265 INFO L231 Difference]: Finished difference. Result has 301 places, 523 transitions, 9265 flow [2024-01-31 17:02:52,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8596, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9265, PETRI_PLACES=301, PETRI_TRANSITIONS=523} [2024-01-31 17:02:52,266 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 275 predicate places. [2024-01-31 17:02:52,266 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 523 transitions, 9265 flow [2024-01-31 17:02:52,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 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 17:02:52,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:52,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:52,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-31 17:02:52,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:52,481 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:02:52,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:52,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1690706121, now seen corresponding path program 21 times [2024-01-31 17:02:52,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454750752] [2024-01-31 17:02:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:52,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:52,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:52,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454750752] [2024-01-31 17:02:52,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454750752] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:52,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389381282] [2024-01-31 17:02:52,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:02:52,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:52,972 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 17:02:53,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-31 17:02:53,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:53,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-31 17:02:53,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:53,126 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 17:02:53,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:53,513 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 15 treesize of output 14 [2024-01-31 17:02:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:53,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389381282] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:58,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:58,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 12] total 37 [2024-01-31 17:02:58,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667549044] [2024-01-31 17:02:58,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:58,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:02:58,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:58,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:02:58,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1223, Unknown=2, NotChecked=0, Total=1406 [2024-01-31 17:02:58,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:02:58,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 523 transitions, 9265 flow. Second operand has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 states have internal predecessors, (183), 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 17:02:58,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:58,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:02:58,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:03,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:03:07,538 WARN L539 Checker$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 17:03:11,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:03:23,876 WARN L539 Checker$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 17:03:27,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:03:40,030 WARN L539 Checker$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 17:03:44,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:03:48,094 WARN L539 Checker$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 17:03:52,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:03:56,313 WARN L539 Checker$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 17:04:00,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:04:12,429 WARN L539 Checker$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 17:04:16,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:04:28,573 WARN L539 Checker$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 17:04:32,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:04:36,666 WARN L539 Checker$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 17:04:40,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:04:44,710 WARN L539 Checker$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 17:04:48,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:04:52,856 WARN L539 Checker$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 17:04:58,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:05:02,647 WARN L539 Checker$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 17:05:06,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:05:10,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:05:14,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:05:18,727 WARN L539 Checker$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 17:05:22,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:05:34,853 WARN L539 Checker$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 17:05:38,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:05:42,921 WARN L539 Checker$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 17:05:46,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:05:51,216 WARN L539 Checker$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 17:05:55,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:05:59,255 WARN L539 Checker$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 17:06:03,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:07,417 WARN L539 Checker$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 17:06:11,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:15,454 WARN L539 Checker$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 17:06:19,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:23,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:27,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:31,865 WARN L539 Checker$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 17:06:35,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:39,982 WARN L539 Checker$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 17:06:44,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:49,387 WARN L539 Checker$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 17:06:53,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:57,869 WARN L539 Checker$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 17:06:58,394 INFO L124 PetriNetUnfolderBase]: 3644/6134 cut-off events. [2024-01-31 17:06:58,394 INFO L125 PetriNetUnfolderBase]: For 106404/106404 co-relation queries the response was YES. [2024-01-31 17:06:58,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51247 conditions, 6134 events. 3644/6134 cut-off events. For 106404/106404 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 38041 event pairs, 380 based on Foata normal form. 1/6135 useless extension candidates. Maximal degree in co-relation 51117. Up to 3724 conditions per place. [2024-01-31 17:06:58,455 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 459 selfloop transitions, 426 changer transitions 4/890 dead transitions. [2024-01-31 17:06:58,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 890 transitions, 16803 flow [2024-01-31 17:06:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-01-31 17:06:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-01-31 17:06:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 385 transitions. [2024-01-31 17:06:58,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3276595744680851 [2024-01-31 17:06:58,457 INFO L175 Difference]: Start difference. First operand has 301 places, 523 transitions, 9265 flow. Second operand 47 states and 385 transitions. [2024-01-31 17:06:58,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 890 transitions, 16803 flow [2024-01-31 17:06:59,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 890 transitions, 16442 flow, removed 134 selfloop flow, removed 14 redundant places. [2024-01-31 17:06:59,143 INFO L231 Difference]: Finished difference. Result has 356 places, 735 transitions, 14934 flow [2024-01-31 17:06:59,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=9032, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=14934, PETRI_PLACES=356, PETRI_TRANSITIONS=735} [2024-01-31 17:06:59,143 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 330 predicate places. [2024-01-31 17:06:59,144 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 735 transitions, 14934 flow [2024-01-31 17:06:59,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 states have internal predecessors, (183), 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 17:06:59,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:06:59,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:06:59,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-31 17:06:59,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:59,356 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:06:59,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:06:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2004524477, now seen corresponding path program 22 times [2024-01-31 17:06:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:06:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556597586] [2024-01-31 17:06:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:06:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:06:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:59,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:06:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556597586] [2024-01-31 17:06:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556597586] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:06:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758259060] [2024-01-31 17:06:59,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:06:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:06:59,948 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:06:59,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 17:07:00,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:07:00,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:00,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:07:00,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:00,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:00,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:00,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:07:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:00,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758259060] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:00,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:00,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-31 17:07:00,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905997643] [2024-01-31 17:07:00,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:07:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:07:00,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:07:00,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:07:00,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 735 transitions, 14934 flow. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 17:07:00,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:00,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:07:00,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:03,156 INFO L124 PetriNetUnfolderBase]: 3098/5537 cut-off events. [2024-01-31 17:07:03,157 INFO L125 PetriNetUnfolderBase]: For 128308/128404 co-relation queries the response was YES. [2024-01-31 17:07:03,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52784 conditions, 5537 events. 3098/5537 cut-off events. For 128308/128404 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 36941 event pairs, 396 based on Foata normal form. 31/5546 useless extension candidates. Maximal degree in co-relation 52630. Up to 4768 conditions per place. [2024-01-31 17:07:03,211 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 710 selfloop transitions, 102 changer transitions 1/832 dead transitions. [2024-01-31 17:07:03,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 832 transitions, 18269 flow [2024-01-31 17:07:03,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:07:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:07:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 243 transitions. [2024-01-31 17:07:03,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-01-31 17:07:03,214 INFO L175 Difference]: Start difference. First operand has 356 places, 735 transitions, 14934 flow. Second operand 27 states and 243 transitions. [2024-01-31 17:07:03,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 832 transitions, 18269 flow [2024-01-31 17:07:04,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 832 transitions, 16944 flow, removed 624 selfloop flow, removed 14 redundant places. [2024-01-31 17:07:04,074 INFO L231 Difference]: Finished difference. Result has 376 places, 777 transitions, 15070 flow [2024-01-31 17:07:04,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=13613, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15070, PETRI_PLACES=376, PETRI_TRANSITIONS=777} [2024-01-31 17:07:04,075 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 350 predicate places. [2024-01-31 17:07:04,121 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 777 transitions, 15070 flow [2024-01-31 17:07:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 17:07:04,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:04,122 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:04,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-01-31 17:07:04,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 17:07:04,322 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:04,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1390470801, now seen corresponding path program 23 times [2024-01-31 17:07:04,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:04,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110228589] [2024-01-31 17:07:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:04,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:04,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:04,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110228589] [2024-01-31 17:07:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110228589] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:04,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981756377] [2024-01-31 17:07:04,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:07:04,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:04,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:04,601 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:04,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 17:07:04,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-31 17:07:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:04,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:07:04,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:04,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:04,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:04,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:07:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:05,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981756377] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:05,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:05,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2024-01-31 17:07:05,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796174230] [2024-01-31 17:07:05,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:05,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:07:05,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:05,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:07:05,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:07:05,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:07:05,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 777 transitions, 15070 flow. Second operand has 26 states, 26 states have (on average 6.8076923076923075) internal successors, (177), 26 states have internal predecessors, (177), 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 17:07:05,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:05,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:07:05,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:07,008 INFO L124 PetriNetUnfolderBase]: 2925/5428 cut-off events. [2024-01-31 17:07:07,008 INFO L125 PetriNetUnfolderBase]: For 144976/145461 co-relation queries the response was YES. [2024-01-31 17:07:07,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53311 conditions, 5428 events. 2925/5428 cut-off events. For 144976/145461 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 37987 event pairs, 353 based on Foata normal form. 218/5594 useless extension candidates. Maximal degree in co-relation 53150. Up to 4051 conditions per place. [2024-01-31 17:07:07,070 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 662 selfloop transitions, 131 changer transitions 2/860 dead transitions. [2024-01-31 17:07:07,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 860 transitions, 17907 flow [2024-01-31 17:07:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:07:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:07:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 196 transitions. [2024-01-31 17:07:07,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126315789473684 [2024-01-31 17:07:07,071 INFO L175 Difference]: Start difference. First operand has 376 places, 777 transitions, 15070 flow. Second operand 19 states and 196 transitions. [2024-01-31 17:07:07,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 860 transitions, 17907 flow [2024-01-31 17:07:07,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 860 transitions, 17301 flow, removed 274 selfloop flow, removed 10 redundant places. [2024-01-31 17:07:07,899 INFO L231 Difference]: Finished difference. Result has 391 places, 810 transitions, 15630 flow [2024-01-31 17:07:07,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14464, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15630, PETRI_PLACES=391, PETRI_TRANSITIONS=810} [2024-01-31 17:07:07,899 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 365 predicate places. [2024-01-31 17:07:07,899 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 810 transitions, 15630 flow [2024-01-31 17:07:07,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.8076923076923075) internal successors, (177), 26 states have internal predecessors, (177), 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 17:07:07,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:07,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:07,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-31 17:07:08,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 17:07:08,111 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:08,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash 713279517, now seen corresponding path program 24 times [2024-01-31 17:07:08,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:08,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792313626] [2024-01-31 17:07:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:08,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:08,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:08,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792313626] [2024-01-31 17:07:08,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792313626] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:08,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932908621] [2024-01-31 17:07:08,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:07:08,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:08,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:08,635 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:08,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 17:07:08,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:07:08,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:08,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:07:08,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:07:08,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:09,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:09,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:07:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:09,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932908621] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:09,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:09,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2024-01-31 17:07:09,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881672612] [2024-01-31 17:07:09,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:09,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:07:09,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:09,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:07:09,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:07:09,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:07:09,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 810 transitions, 15630 flow. Second operand has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 31 states have internal predecessors, (163), 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 17:07:09,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:09,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:07:09,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:12,325 INFO L124 PetriNetUnfolderBase]: 4360/7341 cut-off events. [2024-01-31 17:07:12,325 INFO L125 PetriNetUnfolderBase]: For 181731/181731 co-relation queries the response was YES. [2024-01-31 17:07:12,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70527 conditions, 7341 events. 4360/7341 cut-off events. For 181731/181731 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 46667 event pairs, 500 based on Foata normal form. 1/7342 useless extension candidates. Maximal degree in co-relation 70361. Up to 5288 conditions per place. [2024-01-31 17:07:12,402 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 612 selfloop transitions, 375 changer transitions 1/989 dead transitions. [2024-01-31 17:07:12,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 989 transitions, 20949 flow [2024-01-31 17:07:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:07:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:07:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 255 transitions. [2024-01-31 17:07:12,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-01-31 17:07:12,403 INFO L175 Difference]: Start difference. First operand has 391 places, 810 transitions, 15630 flow. Second operand 29 states and 255 transitions. [2024-01-31 17:07:12,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 989 transitions, 20949 flow [2024-01-31 17:07:13,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 989 transitions, 20839 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-01-31 17:07:13,493 INFO L231 Difference]: Finished difference. Result has 424 places, 882 transitions, 19079 flow [2024-01-31 17:07:13,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=15521, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=19079, PETRI_PLACES=424, PETRI_TRANSITIONS=882} [2024-01-31 17:07:13,494 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 398 predicate places. [2024-01-31 17:07:13,494 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 882 transitions, 19079 flow [2024-01-31 17:07:13,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 31 states have internal predecessors, (163), 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 17:07:13,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:13,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:13,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-31 17:07:13,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 17:07:13,697 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:13,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:13,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1406130979, now seen corresponding path program 25 times [2024-01-31 17:07:13,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:13,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600563043] [2024-01-31 17:07:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:13,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:14,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:14,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600563043] [2024-01-31 17:07:14,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600563043] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:14,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125026914] [2024-01-31 17:07:14,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:07:14,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:14,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:14,136 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:14,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 17:07:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:14,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:07:14,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:14,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:14,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:14,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:07:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:14,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125026914] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:14,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:14,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-31 17:07:14,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028115163] [2024-01-31 17:07:14,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:14,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:07:14,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:07:14,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:07:14,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:07:14,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 882 transitions, 19079 flow. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 17:07:14,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:14,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:07:14,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:17,976 INFO L124 PetriNetUnfolderBase]: 3687/6619 cut-off events. [2024-01-31 17:07:17,976 INFO L125 PetriNetUnfolderBase]: For 208443/208557 co-relation queries the response was YES. [2024-01-31 17:07:18,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69538 conditions, 6619 events. 3687/6619 cut-off events. For 208443/208557 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 45476 event pairs, 499 based on Foata normal form. 23/6621 useless extension candidates. Maximal degree in co-relation 69357. Up to 5676 conditions per place. [2024-01-31 17:07:18,050 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 856 selfloop transitions, 96 changer transitions 1/972 dead transitions. [2024-01-31 17:07:18,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 972 transitions, 22677 flow [2024-01-31 17:07:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:07:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:07:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 257 transitions. [2024-01-31 17:07:18,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544827586206897 [2024-01-31 17:07:18,051 INFO L175 Difference]: Start difference. First operand has 424 places, 882 transitions, 19079 flow. Second operand 29 states and 257 transitions. [2024-01-31 17:07:18,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 972 transitions, 22677 flow [2024-01-31 17:07:19,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 972 transitions, 21967 flow, removed 335 selfloop flow, removed 11 redundant places. [2024-01-31 17:07:19,423 INFO L231 Difference]: Finished difference. Result has 445 places, 912 transitions, 19518 flow [2024-01-31 17:07:19,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18373, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=19518, PETRI_PLACES=445, PETRI_TRANSITIONS=912} [2024-01-31 17:07:19,424 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 419 predicate places. [2024-01-31 17:07:19,424 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 912 transitions, 19518 flow [2024-01-31 17:07:19,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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 17:07:19,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:19,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:19,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-01-31 17:07:19,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:19,636 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:19,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1780009973, now seen corresponding path program 26 times [2024-01-31 17:07:19,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:19,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041855317] [2024-01-31 17:07:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:19,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:20,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:20,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041855317] [2024-01-31 17:07:20,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041855317] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:20,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985092592] [2024-01-31 17:07:20,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:07:20,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:20,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:20,148 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:20,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 17:07:20,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:07:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:20,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:07:20,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:07:20,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:20,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:20,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:07:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:20,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985092592] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:20,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:20,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 31 [2024-01-31 17:07:20,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895641556] [2024-01-31 17:07:20,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:20,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 17:07:20,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:20,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 17:07:20,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-01-31 17:07:20,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:07:20,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 912 transitions, 19518 flow. Second operand has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 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 17:07:20,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:20,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:07:20,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:25,064 INFO L124 PetriNetUnfolderBase]: 4831/8136 cut-off events. [2024-01-31 17:07:25,064 INFO L125 PetriNetUnfolderBase]: For 271236/271236 co-relation queries the response was YES. [2024-01-31 17:07:25,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85762 conditions, 8136 events. 4831/8136 cut-off events. For 271236/271236 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 52395 event pairs, 862 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 85575. Up to 7381 conditions per place. [2024-01-31 17:07:25,157 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 904 selfloop transitions, 113 changer transitions 2/1020 dead transitions. [2024-01-31 17:07:25,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1020 transitions, 23725 flow [2024-01-31 17:07:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:07:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:07:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 208 transitions. [2024-01-31 17:07:25,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781818181818182 [2024-01-31 17:07:25,158 INFO L175 Difference]: Start difference. First operand has 445 places, 912 transitions, 19518 flow. Second operand 22 states and 208 transitions. [2024-01-31 17:07:25,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1020 transitions, 23725 flow [2024-01-31 17:07:26,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1020 transitions, 23328 flow, removed 157 selfloop flow, removed 15 redundant places. [2024-01-31 17:07:26,917 INFO L231 Difference]: Finished difference. Result has 457 places, 936 transitions, 20345 flow [2024-01-31 17:07:26,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19137, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=20345, PETRI_PLACES=457, PETRI_TRANSITIONS=936} [2024-01-31 17:07:26,918 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 431 predicate places. [2024-01-31 17:07:26,918 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 936 transitions, 20345 flow [2024-01-31 17:07:26,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 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 17:07:26,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:26,919 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:26,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-31 17:07:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:27,130 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:27,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1828058227, now seen corresponding path program 27 times [2024-01-31 17:07:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:27,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772838210] [2024-01-31 17:07:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:27,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:27,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772838210] [2024-01-31 17:07:27,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772838210] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:27,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508715937] [2024-01-31 17:07:27,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:07:27,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:27,690 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:27,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 17:07:27,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:07:27,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:27,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 17:07:27,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:27,841 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 17:07:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:28,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:28,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508715937] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:28,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:28,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 32 [2024-01-31 17:07:28,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021202318] [2024-01-31 17:07:28,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:28,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 17:07:28,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 17:07:28,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 17:07:28,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:07:28,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 936 transitions, 20345 flow. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 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 17:07:28,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:28,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:07:28,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:32,251 INFO L124 PetriNetUnfolderBase]: 4955/8347 cut-off events. [2024-01-31 17:07:32,251 INFO L125 PetriNetUnfolderBase]: For 290215/290215 co-relation queries the response was YES. [2024-01-31 17:07:32,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89305 conditions, 8347 events. 4955/8347 cut-off events. For 290215/290215 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 54193 event pairs, 970 based on Foata normal form. 1/8348 useless extension candidates. Maximal degree in co-relation 89111. Up to 7961 conditions per place. [2024-01-31 17:07:32,368 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 937 selfloop transitions, 68 changer transitions 1/1007 dead transitions. [2024-01-31 17:07:32,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1007 transitions, 23677 flow [2024-01-31 17:07:32,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:07:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:07:32,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 186 transitions. [2024-01-31 17:07:32,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3381818181818182 [2024-01-31 17:07:32,370 INFO L175 Difference]: Start difference. First operand has 457 places, 936 transitions, 20345 flow. Second operand 22 states and 186 transitions. [2024-01-31 17:07:32,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1007 transitions, 23677 flow [2024-01-31 17:07:34,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1007 transitions, 23238 flow, removed 176 selfloop flow, removed 14 redundant places. [2024-01-31 17:07:34,327 INFO L231 Difference]: Finished difference. Result has 467 places, 952 transitions, 20736 flow [2024-01-31 17:07:34,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19942, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=20736, PETRI_PLACES=467, PETRI_TRANSITIONS=952} [2024-01-31 17:07:34,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 441 predicate places. [2024-01-31 17:07:34,334 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 952 transitions, 20736 flow [2024-01-31 17:07:34,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 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 17:07:34,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:34,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:34,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-31 17:07:34,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:34,545 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:34,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1096810793, now seen corresponding path program 28 times [2024-01-31 17:07:34,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:34,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245227839] [2024-01-31 17:07:34,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:34,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:35,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245227839] [2024-01-31 17:07:35,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245227839] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:35,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717153335] [2024-01-31 17:07:35,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:07:35,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:35,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:35,116 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:35,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 17:07:35,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:07:35,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:35,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:07:35,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:35,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:35,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:35,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:07:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717153335] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:35,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:35,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 9] total 26 [2024-01-31 17:07:35,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336680557] [2024-01-31 17:07:35,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:07:35,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:35,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:07:35,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:07:35,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:07:35,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 952 transitions, 20736 flow. Second operand has 27 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 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 17:07:35,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:35,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:07:35,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:39,623 INFO L124 PetriNetUnfolderBase]: 5100/8589 cut-off events. [2024-01-31 17:07:39,623 INFO L125 PetriNetUnfolderBase]: For 292836/292836 co-relation queries the response was YES. [2024-01-31 17:07:39,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92556 conditions, 8589 events. 5100/8589 cut-off events. For 292836/292836 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 56307 event pairs, 646 based on Foata normal form. 1/8590 useless extension candidates. Maximal degree in co-relation 92358. Up to 6227 conditions per place. [2024-01-31 17:07:39,731 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 707 selfloop transitions, 394 changer transitions 1/1103 dead transitions. [2024-01-31 17:07:39,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1103 transitions, 25490 flow [2024-01-31 17:07:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:07:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:07:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 257 transitions. [2024-01-31 17:07:39,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544827586206897 [2024-01-31 17:07:39,732 INFO L175 Difference]: Start difference. First operand has 467 places, 952 transitions, 20736 flow. Second operand 29 states and 257 transitions. [2024-01-31 17:07:39,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1103 transitions, 25490 flow [2024-01-31 17:07:41,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1103 transitions, 25076 flow, removed 169 selfloop flow, removed 14 redundant places. [2024-01-31 17:07:41,763 INFO L231 Difference]: Finished difference. Result has 484 places, 972 transitions, 22291 flow [2024-01-31 17:07:41,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=20336, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22291, PETRI_PLACES=484, PETRI_TRANSITIONS=972} [2024-01-31 17:07:41,764 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 458 predicate places. [2024-01-31 17:07:41,764 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 972 transitions, 22291 flow [2024-01-31 17:07:41,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 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 17:07:41,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:41,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:41,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-01-31 17:07:41,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-01-31 17:07:41,974 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:41,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash 598569697, now seen corresponding path program 29 times [2024-01-31 17:07:41,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:41,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72324922] [2024-01-31 17:07:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:41,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:42,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:42,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72324922] [2024-01-31 17:07:42,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72324922] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:42,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445240528] [2024-01-31 17:07:42,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:07:42,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:42,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:42,483 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:42,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 17:07:42,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:07:42,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:42,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:07:42,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:07:42,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:42,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:42,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:07:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:43,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445240528] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:43,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:43,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2024-01-31 17:07:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555558870] [2024-01-31 17:07:43,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:43,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:07:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:07:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:07:43,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:07:43,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 972 transitions, 22291 flow. Second operand has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 31 states have internal predecessors, (163), 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 17:07:43,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:43,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:07:43,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:47,986 INFO L124 PetriNetUnfolderBase]: 5783/9731 cut-off events. [2024-01-31 17:07:47,986 INFO L125 PetriNetUnfolderBase]: For 410440/410440 co-relation queries the response was YES. [2024-01-31 17:07:48,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109698 conditions, 9731 events. 5783/9731 cut-off events. For 410440/410440 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 65340 event pairs, 560 based on Foata normal form. 2/9733 useless extension candidates. Maximal degree in co-relation 109497. Up to 7001 conditions per place. [2024-01-31 17:07:48,104 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 839 selfloop transitions, 619 changer transitions 2/1461 dead transitions. [2024-01-31 17:07:48,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 1461 transitions, 36685 flow [2024-01-31 17:07:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 17:07:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 17:07:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 334 transitions. [2024-01-31 17:07:48,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36108108108108106 [2024-01-31 17:07:48,106 INFO L175 Difference]: Start difference. First operand has 484 places, 972 transitions, 22291 flow. Second operand 37 states and 334 transitions. [2024-01-31 17:07:48,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 1461 transitions, 36685 flow [2024-01-31 17:07:50,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1461 transitions, 36144 flow, removed 194 selfloop flow, removed 25 redundant places. [2024-01-31 17:07:50,624 INFO L231 Difference]: Finished difference. Result has 508 places, 1260 transitions, 32745 flow [2024-01-31 17:07:50,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=21870, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=32745, PETRI_PLACES=508, PETRI_TRANSITIONS=1260} [2024-01-31 17:07:50,625 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 482 predicate places. [2024-01-31 17:07:50,625 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 1260 transitions, 32745 flow [2024-01-31 17:07:50,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 31 states have internal predecessors, (163), 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 17:07:50,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:50,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:50,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-31 17:07:50,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:50,836 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:50,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1646007299, now seen corresponding path program 30 times [2024-01-31 17:07:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:50,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747804156] [2024-01-31 17:07:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:50,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:51,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:51,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747804156] [2024-01-31 17:07:51,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747804156] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:51,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627236492] [2024-01-31 17:07:51,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:07:51,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:51,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:51,348 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:51,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 17:07:51,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:07:51,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:51,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:07:51,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:07:51,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:51,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:51,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:07:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:51,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627236492] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:51,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:51,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2024-01-31 17:07:51,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062563577] [2024-01-31 17:07:51,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:51,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:07:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:07:51,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:07:52,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:07:52,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1260 transitions, 32745 flow. Second operand has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:07:52,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:52,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:07:52,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:56,971 INFO L124 PetriNetUnfolderBase]: 5908/9945 cut-off events. [2024-01-31 17:07:56,971 INFO L125 PetriNetUnfolderBase]: For 444718/444718 co-relation queries the response was YES. [2024-01-31 17:07:57,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120427 conditions, 9945 events. 5908/9945 cut-off events. For 444718/444718 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 66480 event pairs, 1038 based on Foata normal form. 1/9946 useless extension candidates. Maximal degree in co-relation 120212. Up to 9503 conditions per place. [2024-01-31 17:07:57,110 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 1260 selfloop transitions, 81 changer transitions 1/1343 dead transitions. [2024-01-31 17:07:57,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1343 transitions, 37293 flow [2024-01-31 17:07:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:07:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:07:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 179 transitions. [2024-01-31 17:07:57,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358 [2024-01-31 17:07:57,111 INFO L175 Difference]: Start difference. First operand has 508 places, 1260 transitions, 32745 flow. Second operand 20 states and 179 transitions. [2024-01-31 17:07:57,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1343 transitions, 37293 flow [2024-01-31 17:08:00,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1343 transitions, 36417 flow, removed 368 selfloop flow, removed 19 redundant places. [2024-01-31 17:08:00,545 INFO L231 Difference]: Finished difference. Result has 513 places, 1283 transitions, 32994 flow [2024-01-31 17:08:00,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=31885, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=32994, PETRI_PLACES=513, PETRI_TRANSITIONS=1283} [2024-01-31 17:08:00,546 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 487 predicate places. [2024-01-31 17:08:00,546 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1283 transitions, 32994 flow [2024-01-31 17:08:00,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:08:00,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:00,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:00,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-31 17:08:00,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:00,759 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:08:00,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1962234441, now seen corresponding path program 31 times [2024-01-31 17:08:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:00,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498475157] [2024-01-31 17:08:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:08:01,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498475157] [2024-01-31 17:08:01,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498475157] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320664599] [2024-01-31 17:08:01,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:08:01,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:01,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:01,553 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:08:01,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-31 17:08:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:01,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:08:01,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:01,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:02,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:08:02,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:08:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:02,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320664599] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:08:02,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:08:02,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-31 17:08:02,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217464150] [2024-01-31 17:08:02,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:08:02,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:08:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:08:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:08:02,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:08:02,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1283 transitions, 32994 flow. Second operand has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 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 17:08:02,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:02,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:08:02,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:07,078 INFO L124 PetriNetUnfolderBase]: 5145/8984 cut-off events. [2024-01-31 17:08:07,078 INFO L125 PetriNetUnfolderBase]: For 416816/417300 co-relation queries the response was YES. [2024-01-31 17:08:07,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111502 conditions, 8984 events. 5145/8984 cut-off events. For 416816/417300 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 62984 event pairs, 662 based on Foata normal form. 259/9222 useless extension candidates. Maximal degree in co-relation 111283. Up to 8100 conditions per place. [2024-01-31 17:08:07,215 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 1238 selfloop transitions, 73 changer transitions 1/1348 dead transitions. [2024-01-31 17:08:07,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1348 transitions, 37581 flow [2024-01-31 17:08:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 17:08:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 17:08:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 167 transitions. [2024-01-31 17:08:07,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711111111111111 [2024-01-31 17:08:07,216 INFO L175 Difference]: Start difference. First operand has 513 places, 1283 transitions, 32994 flow. Second operand 18 states and 167 transitions. [2024-01-31 17:08:07,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1348 transitions, 37581 flow [2024-01-31 17:08:10,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1348 transitions, 37104 flow, removed 203 selfloop flow, removed 10 redundant places. [2024-01-31 17:08:10,316 INFO L231 Difference]: Finished difference. Result has 523 places, 1310 transitions, 33950 flow [2024-01-31 17:08:10,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=32517, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=33950, PETRI_PLACES=523, PETRI_TRANSITIONS=1310} [2024-01-31 17:08:10,317 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 497 predicate places. [2024-01-31 17:08:10,317 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1310 transitions, 33950 flow [2024-01-31 17:08:10,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 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 17:08:10,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:10,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:10,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-01-31 17:08:10,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-01-31 17:08:10,521 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:08:10,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -816266273, now seen corresponding path program 32 times [2024-01-31 17:08:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949396846] [2024-01-31 17:08:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:08:10,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949396846] [2024-01-31 17:08:10,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949396846] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693748789] [2024-01-31 17:08:10,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:08:10,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:10,935 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:08:10,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-31 17:08:11,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:08:11,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:08:11,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:08:11,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:08:11,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:11,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:08:11,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:08:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:11,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693748789] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:08:11,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:08:11,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 31 [2024-01-31 17:08:11,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709567317] [2024-01-31 17:08:11,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:08:11,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 17:08:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:11,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 17:08:11,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2024-01-31 17:08:11,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:08:11,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1310 transitions, 33950 flow. Second operand has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 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 17:08:11,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:11,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:08:11,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:17,111 INFO L124 PetriNetUnfolderBase]: 6372/10728 cut-off events. [2024-01-31 17:08:17,111 INFO L125 PetriNetUnfolderBase]: For 504459/504459 co-relation queries the response was YES. [2024-01-31 17:08:17,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132471 conditions, 10728 events. 6372/10728 cut-off events. For 504459/504459 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 72681 event pairs, 1118 based on Foata normal form. 2/10730 useless extension candidates. Maximal degree in co-relation 132249. Up to 10106 conditions per place. [2024-01-31 17:08:17,277 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 1344 selfloop transitions, 105 changer transitions 2/1452 dead transitions. [2024-01-31 17:08:17,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1452 transitions, 40792 flow [2024-01-31 17:08:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:08:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:08:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 245 transitions. [2024-01-31 17:08:17,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-01-31 17:08:17,284 INFO L175 Difference]: Start difference. First operand has 523 places, 1310 transitions, 33950 flow. Second operand 27 states and 245 transitions. [2024-01-31 17:08:17,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1452 transitions, 40792 flow [2024-01-31 17:08:20,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1452 transitions, 40223 flow, removed 254 selfloop flow, removed 8 redundant places. [2024-01-31 17:08:20,687 INFO L231 Difference]: Finished difference. Result has 549 places, 1362 transitions, 36135 flow [2024-01-31 17:08:20,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=33381, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=36135, PETRI_PLACES=549, PETRI_TRANSITIONS=1362} [2024-01-31 17:08:20,689 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 523 predicate places. [2024-01-31 17:08:20,689 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 1362 transitions, 36135 flow [2024-01-31 17:08:20,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 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 17:08:20,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:20,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:20,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-01-31 17:08:20,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-31 17:08:20,903 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:08:20,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1776767851, now seen corresponding path program 33 times [2024-01-31 17:08:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:20,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274319492] [2024-01-31 17:08:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:20,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:08:21,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:21,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274319492] [2024-01-31 17:08:21,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274319492] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:21,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318401338] [2024-01-31 17:08:21,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:08:21,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:21,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:21,412 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:08:21,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-31 17:08:21,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:08:21,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:08:21,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 17:08:21,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:21,566 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 17:08:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:08:21,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:21,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318401338] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:08:21,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:08:21,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 33 [2024-01-31 17:08:21,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747969366] [2024-01-31 17:08:21,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:08:21,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:08:21,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:08:21,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:08:22,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-31 17:08:22,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 1362 transitions, 36135 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 17:08:22,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:22,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-31 17:08:22,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:28,383 INFO L124 PetriNetUnfolderBase]: 6633/11154 cut-off events. [2024-01-31 17:08:28,383 INFO L125 PetriNetUnfolderBase]: For 581779/581779 co-relation queries the response was YES. [2024-01-31 17:08:28,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141623 conditions, 11154 events. 6633/11154 cut-off events. For 581779/581779 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 75941 event pairs, 1166 based on Foata normal form. 1/11155 useless extension candidates. Maximal degree in co-relation 141391. Up to 10455 conditions per place. [2024-01-31 17:08:28,703 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1344 selfloop transitions, 158 changer transitions 1/1504 dead transitions. [2024-01-31 17:08:28,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1504 transitions, 43513 flow [2024-01-31 17:08:28,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:08:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:08:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 248 transitions. [2024-01-31 17:08:28,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34206896551724136 [2024-01-31 17:08:28,704 INFO L175 Difference]: Start difference. First operand has 549 places, 1362 transitions, 36135 flow. Second operand 29 states and 248 transitions. [2024-01-31 17:08:28,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1504 transitions, 43513 flow [2024-01-31 17:08:32,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1504 transitions, 42125 flow, removed 648 selfloop flow, removed 11 redundant places. [2024-01-31 17:08:32,954 INFO L231 Difference]: Finished difference. Result has 576 places, 1437 transitions, 38772 flow [2024-01-31 17:08:32,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=34747, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=38772, PETRI_PLACES=576, PETRI_TRANSITIONS=1437} [2024-01-31 17:08:32,955 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 550 predicate places. [2024-01-31 17:08:32,955 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1437 transitions, 38772 flow [2024-01-31 17:08:32,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 17:08:32,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:32,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:32,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-31 17:08:33,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-31 17:08:33,167 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:08:33,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1775711011, now seen corresponding path program 34 times [2024-01-31 17:08:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:33,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519806759] [2024-01-31 17:08:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:08:33,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:33,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519806759] [2024-01-31 17:08:33,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519806759] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:33,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034647101] [2024-01-31 17:08:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:08:33,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:33,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:33,508 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:08:33,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-31 17:08:33,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:08:33,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:08:33,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:08:33,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:33,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:33,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:08:33,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:08:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:33,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034647101] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:08:33,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:08:33,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2024-01-31 17:08:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70561462] [2024-01-31 17:08:33,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:08:33,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:08:33,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:08:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:08:34,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-31 17:08:34,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1437 transitions, 38772 flow. Second operand has 27 states, 27 states have (on average 6.851851851851852) internal successors, (185), 27 states have internal predecessors, (185), 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 17:08:34,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:34,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-31 17:08:34,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:39,637 INFO L124 PetriNetUnfolderBase]: 5193/9371 cut-off events. [2024-01-31 17:08:39,637 INFO L125 PetriNetUnfolderBase]: For 622804/623959 co-relation queries the response was YES. [2024-01-31 17:08:39,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130440 conditions, 9371 events. 5193/9371 cut-off events. For 622804/623959 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 69472 event pairs, 588 based on Foata normal form. 652/9971 useless extension candidates. Maximal degree in co-relation 130196. Up to 7537 conditions per place. [2024-01-31 17:08:39,785 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 1299 selfloop transitions, 111 changer transitions 2/1516 dead transitions. [2024-01-31 17:08:39,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1516 transitions, 44487 flow [2024-01-31 17:08:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:08:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:08:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 201 transitions. [2024-01-31 17:08:39,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402 [2024-01-31 17:08:39,787 INFO L175 Difference]: Start difference. First operand has 576 places, 1437 transitions, 38772 flow. Second operand 20 states and 201 transitions. [2024-01-31 17:08:39,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1516 transitions, 44487 flow [2024-01-31 17:08:44,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 1516 transitions, 42021 flow, removed 1164 selfloop flow, removed 12 redundant places. [2024-01-31 17:08:44,107 INFO L231 Difference]: Finished difference. Result has 588 places, 1472 transitions, 38676 flow [2024-01-31 17:08:44,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=36608, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=38676, PETRI_PLACES=588, PETRI_TRANSITIONS=1472} [2024-01-31 17:08:44,109 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 562 predicate places. [2024-01-31 17:08:44,110 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 1472 transitions, 38676 flow [2024-01-31 17:08:44,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.851851851851852) internal successors, (185), 27 states have internal predecessors, (185), 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 17:08:44,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:44,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:44,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-01-31 17:08:44,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 17:08:44,319 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:08:44,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:44,319 INFO L85 PathProgramCache]: Analyzing trace with hash -295266535, now seen corresponding path program 35 times [2024-01-31 17:08:44,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:44,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594470146] [2024-01-31 17:08:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:44,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:08:44,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:44,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594470146] [2024-01-31 17:08:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594470146] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:44,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880317051] [2024-01-31 17:08:44,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:08:44,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:44,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:44,881 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:08:44,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-31 17:08:44,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:08:44,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:08:44,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:08:44,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:45,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:45,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:08:45,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-31 17:08:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:45,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880317051] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:08:45,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:08:45,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-31 17:08:45,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609182765] [2024-01-31 17:08:45,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:08:45,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:08:45,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:45,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:08:45,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:08:45,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-31 17:08:45,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 1472 transitions, 38676 flow. Second operand has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 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 17:08:45,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:45,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-31 17:08:45,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand