./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.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-more-min-array-hom.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-more-min-array-hom.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-more-min-array-hom.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 17:08:53,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:08:53,672 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:08:53,675 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:08:53,675 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:08:53,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:08:53,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:08:53,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:08:53,689 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:08:53,689 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:08:53,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:08:53,689 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:08:53,690 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:08:53,690 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:08:53,690 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:08:53,691 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:08:53,691 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:08:53,691 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:08:53,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:08:53,694 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:08:53,694 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:08:53,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:08:53,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:08:53,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:08:53,695 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:08:53,695 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:08:53,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:08:53,696 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:08:53,696 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:08:53,696 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:08:53,697 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:08:53,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:08:53,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:08:53,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:08:53,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:08:53,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:08:53,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:08:53,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:08:53,699 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:08:53,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:08:53,699 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:08:53,699 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:08:53,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:08:53,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:08:53,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:08:53,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:08:53,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:08:53,927 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:08:53,927 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:08:53,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2024-01-31 17:08:55,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:08:55,180 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:08:55,181 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2024-01-31 17:08:55,186 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12f4fa3ff/26998ae5126046eca2332c5e9beecc41/FLAG064ec307f [2024-01-31 17:08:55,196 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12f4fa3ff/26998ae5126046eca2332c5e9beecc41 [2024-01-31 17:08:55,198 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:08:55,198 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:08:55,199 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-more-min-array-hom.wvr.yml/witness.yml [2024-01-31 17:08:55,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:08:55,327 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:08:55,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:08:55,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:08:55,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:08:55,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:08:55" (1/2) ... [2024-01-31 17:08:55,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b3532e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:08:55, skipping insertion in model container [2024-01-31 17:08:55,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:08:55" (1/2) ... [2024-01-31 17:08:55,338 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c5d5712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:08:55, skipping insertion in model container [2024-01-31 17:08:55,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:08:55" (2/2) ... [2024-01-31 17:08:55,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b3532e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:08:55, skipping insertion in model container [2024-01-31 17:08:55,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:08:55" (2/2) ... [2024-01-31 17:08:55,339 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:08:55,371 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:08:55,386 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:08:55,594 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-more-min-array-hom.wvr.c[2625,2638] [2024-01-31 17:08:55,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:08:55,617 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:08:55,644 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-more-min-array-hom.wvr.c[2625,2638] [2024-01-31 17:08:55,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:08:55,662 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:08:55,664 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:08:55 WrapperNode [2024-01-31 17:08:55,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:08:55,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:08:55,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:08:55,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:08:55,674 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,689 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,715 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2024-01-31 17:08:55,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:08:55,716 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:08:55,716 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:08:55,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:08:55,728 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,730 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,745 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,773 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 7, 2, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-31 17:08:55,773 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,774 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,780 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,797 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,799 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,800 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:08:55,802 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:08:55,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:08:55,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:08:55,803 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 05:08:55" (1/1) ... [2024-01-31 17:08:55,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:08:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:55,826 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 17:08:55,846 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 17:08:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:08:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:08:55,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:08:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:08:55,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:08:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 17:08:55,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 17:08:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:08:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:08:55,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:08:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:08:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:08:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:08:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:08:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:08:55,867 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 17:08:55,996 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:08:56,000 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:08:56,207 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:08:56,208 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:08:56,390 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:08:56,390 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 17:08:56,391 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:08:56 BoogieIcfgContainer [2024-01-31 17:08:56,391 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:08:56,392 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:08:56,393 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:08:56,395 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:08:56,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:08:55" (1/4) ... [2024-01-31 17:08:56,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2418e2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:08:56, skipping insertion in model container [2024-01-31 17:08:56,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:08:55" (2/4) ... [2024-01-31 17:08:56,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2418e2e9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:08:56, skipping insertion in model container [2024-01-31 17:08:56,397 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 05:08:55" (3/4) ... [2024-01-31 17:08:56,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2418e2e9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:08:56, skipping insertion in model container [2024-01-31 17:08:56,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:08:56" (4/4) ... [2024-01-31 17:08:56,398 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2024-01-31 17:08:56,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:08:56,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:08:56,412 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:08:56,465 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 17:08:56,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2024-01-31 17:08:56,527 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-01-31 17:08:56,527 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:08:56,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-01-31 17:08:56,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2024-01-31 17:08:56,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2024-01-31 17:08:56,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:08:56,555 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;@5c782d65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:08:56,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:08:56,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:08:56,570 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-01-31 17:08:56,570 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:08:56,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:56,571 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] [2024-01-31 17:08:56,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:08:56,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:56,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1064244367, now seen corresponding path program 1 times [2024-01-31 17:08:56,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:56,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821896771] [2024-01-31 17:08:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:56,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:57,054 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 17:08:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:57,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821896771] [2024-01-31 17:08:57,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821896771] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:08:57,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:08:57,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:08:57,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458268978] [2024-01-31 17:08:57,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:08:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:08:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:08:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:08:57,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-31 17:08:57,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 17:08:57,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:57,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-31 17:08:57,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:57,325 INFO L124 PetriNetUnfolderBase]: 674/1036 cut-off events. [2024-01-31 17:08:57,325 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-01-31 17:08:57,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 1036 events. 674/1036 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4101 event pairs, 140 based on Foata normal form. 1/1023 useless extension candidates. Maximal degree in co-relation 1708. Up to 740 conditions per place. [2024-01-31 17:08:57,336 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2024-01-31 17:08:57,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 225 flow [2024-01-31 17:08:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:08:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:08:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-01-31 17:08:57,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-01-31 17:08:57,347 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 68 transitions. [2024-01-31 17:08:57,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 225 flow [2024-01-31 17:08:57,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 203 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 17:08:57,355 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2024-01-31 17:08:57,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2024-01-31 17:08:57,359 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-01-31 17:08:57,359 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2024-01-31 17:08:57,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 17:08:57,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:57,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:57,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:08:57,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:08:57,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash 937462874, now seen corresponding path program 1 times [2024-01-31 17:08:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:57,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786921916] [2024-01-31 17:08:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:08:57,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:57,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786921916] [2024-01-31 17:08:57,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786921916] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:08:57,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:08:57,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:08:57,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204937554] [2024-01-31 17:08:57,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:08:57,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:08:57,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:08:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:08:57,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-31 17:08:57,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 17:08:57,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:57,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-31 17:08:57,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:57,650 INFO L124 PetriNetUnfolderBase]: 674/1032 cut-off events. [2024-01-31 17:08:57,650 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2024-01-31 17:08:57,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1032 events. 674/1032 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4218 event pairs, 447 based on Foata normal form. 0/1002 useless extension candidates. Maximal degree in co-relation 875. Up to 984 conditions per place. [2024-01-31 17:08:57,656 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-01-31 17:08:57,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 158 flow [2024-01-31 17:08:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:08:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:08:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-01-31 17:08:57,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 17:08:57,662 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 3 states and 50 transitions. [2024-01-31 17:08:57,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 158 flow [2024-01-31 17:08:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:08:57,670 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 102 flow [2024-01-31 17:08:57,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-01-31 17:08:57,671 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-01-31 17:08:57,671 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 102 flow [2024-01-31 17:08:57,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 17:08:57,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:57,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:08:57,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:08:57,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 200410163, now seen corresponding path program 1 times [2024-01-31 17:08:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003176712] [2024-01-31 17:08:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:08:57,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:57,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003176712] [2024-01-31 17:08:57,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003176712] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:08:57,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:08:57,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:08:57,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831868869] [2024-01-31 17:08:57,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:08:57,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:08:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:08:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:08:57,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:08:57,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:08:57,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:57,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:08:57,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:57,935 INFO L124 PetriNetUnfolderBase]: 865/1276 cut-off events. [2024-01-31 17:08:57,935 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-01-31 17:08:57,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1276 events. 865/1276 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5147 event pairs, 265 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 2812. Up to 649 conditions per place. [2024-01-31 17:08:57,942 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-01-31 17:08:57,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 240 flow [2024-01-31 17:08:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:08:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:08:57,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-01-31 17:08:57,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-01-31 17:08:57,943 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 102 flow. Second operand 4 states and 67 transitions. [2024-01-31 17:08:57,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 240 flow [2024-01-31 17:08:57,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 234 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-31 17:08:57,945 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 117 flow [2024-01-31 17:08:57,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-01-31 17:08:57,946 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-01-31 17:08:57,946 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 117 flow [2024-01-31 17:08:57,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:08:57,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:57,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:08:57,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:08:57,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1953148681, now seen corresponding path program 1 times [2024-01-31 17:08:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:57,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383467768] [2024-01-31 17:08:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:58,020 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 17:08:58,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383467768] [2024-01-31 17:08:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383467768] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964291465] [2024-01-31 17:08:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:58,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:58,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:58,023 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 17:08:58,044 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 17:08:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:58,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:08:58,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:58,168 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 17:08:58,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:58,194 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 17:08:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964291465] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:58,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:08:58,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-01-31 17:08:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305914597] [2024-01-31 17:08:58,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:08:58,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:08:58,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:08:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-01-31 17:08:58,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:08:58,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 17:08:58,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:58,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:08:58,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:58,335 INFO L124 PetriNetUnfolderBase]: 900/1367 cut-off events. [2024-01-31 17:08:58,335 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2024-01-31 17:08:58,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3425 conditions, 1367 events. 900/1367 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5725 event pairs, 281 based on Foata normal form. 0/1303 useless extension candidates. Maximal degree in co-relation 3405. Up to 670 conditions per place. [2024-01-31 17:08:58,342 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 43 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-01-31 17:08:58,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 265 flow [2024-01-31 17:08:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:08:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:08:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-01-31 17:08:58,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2024-01-31 17:08:58,346 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 117 flow. Second operand 5 states and 74 transitions. [2024-01-31 17:08:58,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 265 flow [2024-01-31 17:08:58,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:08:58,350 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 136 flow [2024-01-31 17:08:58,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-01-31 17:08:58,352 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2024-01-31 17:08:58,352 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 136 flow [2024-01-31 17:08:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 17:08:58,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:58,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:58,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:08:58,563 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 17:08:58,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:08:58,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:58,565 INFO L85 PathProgramCache]: Analyzing trace with hash -239191844, now seen corresponding path program 1 times [2024-01-31 17:08:58,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:58,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076761577] [2024-01-31 17:08:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:58,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:59,216 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 17:08:59,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:59,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076761577] [2024-01-31 17:08:59,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076761577] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:59,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248155430] [2024-01-31 17:08:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:59,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:59,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:59,221 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 17:08:59,263 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 17:08:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:59,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 17:08:59,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:59,384 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 17:08:59,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-01-31 17:08:59,725 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 17:08:59,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:09:01,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-01-31 17:09:01,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:01,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-01-31 17:09:13,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2024-01-31 17:09:13,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:13,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2024-01-31 17:09:16,930 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 17:09:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248155430] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:09:16,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:09:16,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2024-01-31 17:09:16,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558958625] [2024-01-31 17:09:16,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:09:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:09:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:09:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:09:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:09:17,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:09:17,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 136 flow. Second operand has 25 states, 25 states have (on average 9.12) internal successors, (228), 25 states have internal predecessors, (228), 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 17:09:17,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:09:17,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:09:17,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:09:19,049 INFO L124 PetriNetUnfolderBase]: 1993/3005 cut-off events. [2024-01-31 17:09:19,050 INFO L125 PetriNetUnfolderBase]: For 1852/1852 co-relation queries the response was YES. [2024-01-31 17:09:19,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8274 conditions, 3005 events. 1993/3005 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13912 event pairs, 114 based on Foata normal form. 1/3005 useless extension candidates. Maximal degree in co-relation 6106. Up to 1481 conditions per place. [2024-01-31 17:09:19,064 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 151 selfloop transitions, 57 changer transitions 1/213 dead transitions. [2024-01-31 17:09:19,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 213 transitions, 1123 flow [2024-01-31 17:09:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 17:09:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 17:09:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 335 transitions. [2024-01-31 17:09:19,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-01-31 17:09:19,068 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 136 flow. Second operand 21 states and 335 transitions. [2024-01-31 17:09:19,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 213 transitions, 1123 flow [2024-01-31 17:09:19,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 213 transitions, 1106 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 17:09:19,073 INFO L231 Difference]: Finished difference. Result has 66 places, 93 transitions, 547 flow [2024-01-31 17:09:19,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=547, PETRI_PLACES=66, PETRI_TRANSITIONS=93} [2024-01-31 17:09:19,076 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2024-01-31 17:09:19,076 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 93 transitions, 547 flow [2024-01-31 17:09:19,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.12) internal successors, (228), 25 states have internal predecessors, (228), 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 17:09:19,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:09:19,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:09:19,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:09:19,287 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 17:09:19,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:09:19,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:09:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1087062616, now seen corresponding path program 2 times [2024-01-31 17:09:19,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:09:19,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937873435] [2024-01-31 17:09:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:09:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:09:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:09:19,827 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 17:09:19,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:09:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937873435] [2024-01-31 17:09:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937873435] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:09:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816038135] [2024-01-31 17:09:19,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:09:19,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:09:19,829 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 17:09:19,830 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 17:09:19,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:09:19,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:09:19,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 17:09:19,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:09:19,949 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 17:09:20,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 42 [2024-01-31 17:09:20,187 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 17:09:20,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:09:21,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-01-31 17:09:21,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:21,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-01-31 17:09:36,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2024-01-31 17:09:37,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:37,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2024-01-31 17:09:41,626 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 17:09:41,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816038135] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:09:41,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:09:41,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-01-31 17:09:41,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048443041] [2024-01-31 17:09:41,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:09:41,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:09:41,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:09:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:09:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:09:41,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-31 17:09:41,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 93 transitions, 547 flow. Second operand has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 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 17:09:41,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:09:41,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-31 17:09:41,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:09:42,636 INFO L124 PetriNetUnfolderBase]: 1667/2662 cut-off events. [2024-01-31 17:09:42,636 INFO L125 PetriNetUnfolderBase]: For 3527/3532 co-relation queries the response was YES. [2024-01-31 17:09:42,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 2662 events. 1667/2662 cut-off events. For 3527/3532 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13306 event pairs, 128 based on Foata normal form. 5/2660 useless extension candidates. Maximal degree in co-relation 7992. Up to 1778 conditions per place. [2024-01-31 17:09:42,651 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 135 selfloop transitions, 49 changer transitions 1/191 dead transitions. [2024-01-31 17:09:42,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 191 transitions, 1251 flow [2024-01-31 17:09:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:09:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:09:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 252 transitions. [2024-01-31 17:09:42,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-01-31 17:09:42,652 INFO L175 Difference]: Start difference. First operand has 66 places, 93 transitions, 547 flow. Second operand 15 states and 252 transitions. [2024-01-31 17:09:42,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 191 transitions, 1251 flow [2024-01-31 17:09:42,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 191 transitions, 1133 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-01-31 17:09:42,663 INFO L231 Difference]: Finished difference. Result has 78 places, 113 transitions, 683 flow [2024-01-31 17:09:42,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=683, PETRI_PLACES=78, PETRI_TRANSITIONS=113} [2024-01-31 17:09:42,666 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2024-01-31 17:09:42,666 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 113 transitions, 683 flow [2024-01-31 17:09:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 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 17:09:42,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:09:42,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:09:42,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:09:42,876 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 17:09:42,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:09:42,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:09:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1909570378, now seen corresponding path program 3 times [2024-01-31 17:09:42,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:09:42,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997149640] [2024-01-31 17:09:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:09:42,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:09:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:09:43,320 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 17:09:43,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:09:43,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997149640] [2024-01-31 17:09:43,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997149640] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:09:43,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225926428] [2024-01-31 17:09:43,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:09:43,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:43,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:09:43,322 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 17:09:43,323 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 17:09:43,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:09:43,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:09:43,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 17:09:43,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:09:43,437 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 17:09:43,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 17:09:43,687 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 17:09:43,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:09:45,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 167 [2024-01-31 17:09:45,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:45,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 219 [2024-01-31 17:09:49,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-01-31 17:09:49,419 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:09:49,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 115 [2024-01-31 17:09:49,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-01-31 17:09:49,619 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-31 17:09:49,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-01-31 17:09:49,669 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 17:09:49,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225926428] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:09:49,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:09:49,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2024-01-31 17:09:49,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972619058] [2024-01-31 17:09:49,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:09:49,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:09:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:09:49,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:09:49,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:09:49,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:09:49,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 113 transitions, 683 flow. Second operand has 23 states, 23 states have (on average 9.304347826086957) internal successors, (214), 23 states have internal predecessors, (214), 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 17:09:49,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:09:49,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:09:49,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:09:51,545 INFO L124 PetriNetUnfolderBase]: 3115/4726 cut-off events. [2024-01-31 17:09:51,546 INFO L125 PetriNetUnfolderBase]: For 5390/5399 co-relation queries the response was YES. [2024-01-31 17:09:51,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15012 conditions, 4726 events. 3115/4726 cut-off events. For 5390/5399 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24333 event pairs, 204 based on Foata normal form. 10/4735 useless extension candidates. Maximal degree in co-relation 13495. Up to 2759 conditions per place. [2024-01-31 17:09:51,587 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 168 selfloop transitions, 89 changer transitions 2/263 dead transitions. [2024-01-31 17:09:51,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 263 transitions, 1781 flow [2024-01-31 17:09:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:09:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:09:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 298 transitions. [2024-01-31 17:09:51,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481203007518797 [2024-01-31 17:09:51,590 INFO L175 Difference]: Start difference. First operand has 78 places, 113 transitions, 683 flow. Second operand 19 states and 298 transitions. [2024-01-31 17:09:51,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 263 transitions, 1781 flow [2024-01-31 17:09:51,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 263 transitions, 1744 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-01-31 17:09:51,618 INFO L231 Difference]: Finished difference. Result has 98 places, 158 transitions, 1226 flow [2024-01-31 17:09:51,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1226, PETRI_PLACES=98, PETRI_TRANSITIONS=158} [2024-01-31 17:09:51,619 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 61 predicate places. [2024-01-31 17:09:51,619 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 158 transitions, 1226 flow [2024-01-31 17:09:51,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.304347826086957) internal successors, (214), 23 states have internal predecessors, (214), 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 17:09:51,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:09:51,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:09:51,635 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 17:09:51,828 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 17:09:51,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:09:51,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:09:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash 580684854, now seen corresponding path program 4 times [2024-01-31 17:09:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:09:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536294635] [2024-01-31 17:09:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:09:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:09:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:09:52,308 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 17:09:52,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:09:52,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536294635] [2024-01-31 17:09:52,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536294635] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:09:52,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187345707] [2024-01-31 17:09:52,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:09:52,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:52,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:09:52,310 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 17:09:52,312 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 17:09:52,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:09:52,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:09:52,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 17:09:52,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:09:52,408 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 17:09:52,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 17:09:52,646 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 17:09:52,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:09:53,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-01-31 17:09:53,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:53,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 119 [2024-01-31 17:09:54,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-01-31 17:09:54,263 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-31 17:09:54,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-01-31 17:09:54,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 167 [2024-01-31 17:09:54,276 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-31 17:09:54,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 1 [2024-01-31 17:09:54,309 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 17:09:54,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187345707] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:09:54,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:09:54,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2024-01-31 17:09:54,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036628515] [2024-01-31 17:09:54,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:09:54,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:09:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:09:54,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:09:54,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:09:54,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:09:54,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 158 transitions, 1226 flow. Second operand has 22 states, 22 states have (on average 9.136363636363637) internal successors, (201), 22 states have internal predecessors, (201), 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 17:09:54,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:09:54,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:09:54,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:09:56,378 INFO L124 PetriNetUnfolderBase]: 3588/5407 cut-off events. [2024-01-31 17:09:56,378 INFO L125 PetriNetUnfolderBase]: For 9517/9526 co-relation queries the response was YES. [2024-01-31 17:09:56,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19370 conditions, 5407 events. 3588/5407 cut-off events. For 9517/9526 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27980 event pairs, 222 based on Foata normal form. 10/5416 useless extension candidates. Maximal degree in co-relation 17869. Up to 2035 conditions per place. [2024-01-31 17:09:56,409 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 150 selfloop transitions, 140 changer transitions 1/295 dead transitions. [2024-01-31 17:09:56,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 295 transitions, 2313 flow [2024-01-31 17:09:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 17:09:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 17:09:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 330 transitions. [2024-01-31 17:09:56,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-01-31 17:09:56,411 INFO L175 Difference]: Start difference. First operand has 98 places, 158 transitions, 1226 flow. Second operand 21 states and 330 transitions. [2024-01-31 17:09:56,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 295 transitions, 2313 flow [2024-01-31 17:09:56,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 295 transitions, 2264 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-01-31 17:09:56,436 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 1701 flow [2024-01-31 17:09:56,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1701, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2024-01-31 17:09:56,436 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 78 predicate places. [2024-01-31 17:09:56,436 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 1701 flow [2024-01-31 17:09:56,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.136363636363637) internal successors, (201), 22 states have internal predecessors, (201), 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 17:09:56,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:09:56,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:09:56,486 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 17:09:56,647 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 17:09:56,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:09:56,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:09:56,648 INFO L85 PathProgramCache]: Analyzing trace with hash 981316720, now seen corresponding path program 5 times [2024-01-31 17:09:56,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:09:56,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936934408] [2024-01-31 17:09:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:09:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:09:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:09:57,127 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 17:09:57,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:09:57,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936934408] [2024-01-31 17:09:57,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936934408] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:09:57,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009731016] [2024-01-31 17:09:57,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:09:57,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:57,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:09:57,129 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 17:09:57,130 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 17:09:57,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:09:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:09:57,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 17:09:57,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:09:57,223 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 17:09:57,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 42 [2024-01-31 17:09:57,561 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 17:09:57,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:09:59,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-01-31 17:09:59,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:59,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 119 [2024-01-31 17:09:59,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 167 [2024-01-31 17:09:59,888 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-31 17:09:59,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 1 [2024-01-31 17:09:59,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-01-31 17:09:59,901 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-31 17:09:59,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-01-31 17:09:59,945 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 17:09:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009731016] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:09:59,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:09:59,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-31 17:09:59,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708934771] [2024-01-31 17:09:59,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:09:59,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:09:59,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:09:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:09:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:10:00,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:10:00,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 1701 flow. Second operand has 25 states, 25 states have (on average 9.04) internal successors, (226), 25 states have internal predecessors, (226), 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 17:10:00,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:00,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:10:00,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:02,879 INFO L124 PetriNetUnfolderBase]: 3765/5727 cut-off events. [2024-01-31 17:10:02,879 INFO L125 PetriNetUnfolderBase]: For 14287/14296 co-relation queries the response was YES. [2024-01-31 17:10:02,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22397 conditions, 5727 events. 3765/5727 cut-off events. For 14287/14296 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30490 event pairs, 174 based on Foata normal form. 10/5736 useless extension candidates. Maximal degree in co-relation 20425. Up to 2085 conditions per place. [2024-01-31 17:10:02,914 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 169 selfloop transitions, 157 changer transitions 2/332 dead transitions. [2024-01-31 17:10:02,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 332 transitions, 2889 flow [2024-01-31 17:10:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 17:10:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 17:10:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 364 transitions. [2024-01-31 17:10:02,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45217391304347826 [2024-01-31 17:10:02,917 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 1701 flow. Second operand 23 states and 364 transitions. [2024-01-31 17:10:02,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 332 transitions, 2889 flow [2024-01-31 17:10:02,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 332 transitions, 2794 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-01-31 17:10:02,960 INFO L231 Difference]: Finished difference. Result has 130 places, 199 transitions, 2152 flow [2024-01-31 17:10:02,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2152, PETRI_PLACES=130, PETRI_TRANSITIONS=199} [2024-01-31 17:10:02,961 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 93 predicate places. [2024-01-31 17:10:02,961 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 199 transitions, 2152 flow [2024-01-31 17:10:02,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.04) internal successors, (226), 25 states have internal predecessors, (226), 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 17:10:02,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:02,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:02,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:10:03,174 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 17:10:03,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:03,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:03,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1066836863, now seen corresponding path program 6 times [2024-01-31 17:10:03,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:03,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307048462] [2024-01-31 17:10:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:03,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:03,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307048462] [2024-01-31 17:10:03,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307048462] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:03,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333690050] [2024-01-31 17:10:03,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:10:03,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:03,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:03,244 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 17:10:03,246 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 17:10:03,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:10:03,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:03,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:10:03,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:03,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:03,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333690050] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:03,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:03,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:10:03,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54445904] [2024-01-31 17:10:03,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:03,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:10:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:10:03,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:10:03,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:10:03,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 199 transitions, 2152 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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 17:10:03,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:03,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:10:03,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:04,195 INFO L124 PetriNetUnfolderBase]: 4993/7532 cut-off events. [2024-01-31 17:10:04,195 INFO L125 PetriNetUnfolderBase]: For 25736/25777 co-relation queries the response was YES. [2024-01-31 17:10:04,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31061 conditions, 7532 events. 4993/7532 cut-off events. For 25736/25777 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 43144 event pairs, 1558 based on Foata normal form. 66/7592 useless extension candidates. Maximal degree in co-relation 30322. Up to 3011 conditions per place. [2024-01-31 17:10:04,246 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 300 selfloop transitions, 33 changer transitions 0/338 dead transitions. [2024-01-31 17:10:04,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 338 transitions, 3900 flow [2024-01-31 17:10:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:10:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:10:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-01-31 17:10:04,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-31 17:10:04,249 INFO L175 Difference]: Start difference. First operand has 130 places, 199 transitions, 2152 flow. Second operand 10 states and 175 transitions. [2024-01-31 17:10:04,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 338 transitions, 3900 flow [2024-01-31 17:10:04,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 338 transitions, 3580 flow, removed 43 selfloop flow, removed 15 redundant places. [2024-01-31 17:10:04,321 INFO L231 Difference]: Finished difference. Result has 127 places, 206 transitions, 2088 flow [2024-01-31 17:10:04,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2088, PETRI_PLACES=127, PETRI_TRANSITIONS=206} [2024-01-31 17:10:04,322 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 90 predicate places. [2024-01-31 17:10:04,322 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 206 transitions, 2088 flow [2024-01-31 17:10:04,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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 17:10:04,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:04,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:04,336 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 17:10:04,537 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 17:10:04,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:04,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash -71156252, now seen corresponding path program 1 times [2024-01-31 17:10:04,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:04,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306721840] [2024-01-31 17:10:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:04,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:10:04,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:04,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306721840] [2024-01-31 17:10:04,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306721840] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:04,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579198733] [2024-01-31 17:10:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:04,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:04,611 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 17:10:04,660 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 17:10:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:04,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:10:04,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:10:04,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:10:04,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579198733] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:04,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:04,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-01-31 17:10:04,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405890573] [2024-01-31 17:10:04,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:04,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:10:04,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:10:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:10:04,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:10:04,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 206 transitions, 2088 flow. Second operand has 13 states, 13 states have (on average 9.461538461538462) internal successors, (123), 13 states have internal predecessors, (123), 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 17:10:04,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:04,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:10:04,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:05,414 INFO L124 PetriNetUnfolderBase]: 3542/5624 cut-off events. [2024-01-31 17:10:05,414 INFO L125 PetriNetUnfolderBase]: For 20536/20555 co-relation queries the response was YES. [2024-01-31 17:10:05,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22708 conditions, 5624 events. 3542/5624 cut-off events. For 20536/20555 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33447 event pairs, 1870 based on Foata normal form. 0/5468 useless extension candidates. Maximal degree in co-relation 21511. Up to 2127 conditions per place. [2024-01-31 17:10:05,440 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 272 selfloop transitions, 6 changer transitions 0/287 dead transitions. [2024-01-31 17:10:05,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 287 transitions, 3464 flow [2024-01-31 17:10:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:10:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:10:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-01-31 17:10:05,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-01-31 17:10:05,441 INFO L175 Difference]: Start difference. First operand has 127 places, 206 transitions, 2088 flow. Second operand 6 states and 103 transitions. [2024-01-31 17:10:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 287 transitions, 3464 flow [2024-01-31 17:10:05,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 287 transitions, 3453 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 17:10:05,479 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1547 flow [2024-01-31 17:10:05,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1547, PETRI_PLACES=132, PETRI_TRANSITIONS=154} [2024-01-31 17:10:05,479 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 95 predicate places. [2024-01-31 17:10:05,479 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1547 flow [2024-01-31 17:10:05,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.461538461538462) internal successors, (123), 13 states have internal predecessors, (123), 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 17:10:05,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:05,480 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:05,491 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 17:10:05,691 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 17:10:05,692 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:05,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash 855270209, now seen corresponding path program 7 times [2024-01-31 17:10:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523565203] [2024-01-31 17:10:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:05,764 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 17:10:05,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523565203] [2024-01-31 17:10:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523565203] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410553014] [2024-01-31 17:10:05,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:10:05,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:05,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:05,766 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 17:10:05,803 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 17:10:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:05,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:10:05,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:05,914 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 17:10:05,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:05,954 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 17:10:05,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410553014] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:05,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:05,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:10:05,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752058505] [2024-01-31 17:10:05,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:05,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:10:05,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:05,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:10:05,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:10:05,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:10:05,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 154 transitions, 1547 flow. Second operand has 14 states, 14 states have (on average 9.857142857142858) internal successors, (138), 14 states have internal predecessors, (138), 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 17:10:05,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:05,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:10:05,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:06,483 INFO L124 PetriNetUnfolderBase]: 3492/5565 cut-off events. [2024-01-31 17:10:06,483 INFO L125 PetriNetUnfolderBase]: For 18370/18503 co-relation queries the response was YES. [2024-01-31 17:10:06,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23093 conditions, 5565 events. 3492/5565 cut-off events. For 18370/18503 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 32176 event pairs, 1685 based on Foata normal form. 206/5765 useless extension candidates. Maximal degree in co-relation 21751. Up to 2100 conditions per place. [2024-01-31 17:10:06,514 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 151 selfloop transitions, 30 changer transitions 0/186 dead transitions. [2024-01-31 17:10:06,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 2016 flow [2024-01-31 17:10:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:10:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:10:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-01-31 17:10:06,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-01-31 17:10:06,517 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1547 flow. Second operand 7 states and 119 transitions. [2024-01-31 17:10:06,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 2016 flow [2024-01-31 17:10:06,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 186 transitions, 1987 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-31 17:10:06,560 INFO L231 Difference]: Finished difference. Result has 135 places, 133 transitions, 1375 flow [2024-01-31 17:10:06,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1375, PETRI_PLACES=135, PETRI_TRANSITIONS=133} [2024-01-31 17:10:06,562 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 98 predicate places. [2024-01-31 17:10:06,562 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 133 transitions, 1375 flow [2024-01-31 17:10:06,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.857142857142858) internal successors, (138), 14 states have internal predecessors, (138), 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 17:10:06,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:06,562 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:06,576 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 17:10:06,774 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 17:10:06,775 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:06,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash 844707693, now seen corresponding path program 8 times [2024-01-31 17:10:06,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125327859] [2024-01-31 17:10:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:06,852 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 17:10:06,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:06,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125327859] [2024-01-31 17:10:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125327859] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:06,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102028924] [2024-01-31 17:10:06,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:10:06,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:06,854 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 17:10:06,858 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 17:10:06,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:10:06,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:06,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:10:06,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:07,018 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 17:10:07,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:07,061 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 17:10:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102028924] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:07,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:10:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219942010] [2024-01-31 17:10:07,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:07,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:10:07,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:10:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:10:07,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-31 17:10:07,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 133 transitions, 1375 flow. Second operand has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 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 17:10:07,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:07,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-31 17:10:07,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:07,528 INFO L124 PetriNetUnfolderBase]: 2762/4411 cut-off events. [2024-01-31 17:10:07,528 INFO L125 PetriNetUnfolderBase]: For 17103/17221 co-relation queries the response was YES. [2024-01-31 17:10:07,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18235 conditions, 4411 events. 2762/4411 cut-off events. For 17103/17221 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24732 event pairs, 1342 based on Foata normal form. 278/4677 useless extension candidates. Maximal degree in co-relation 17453. Up to 1865 conditions per place. [2024-01-31 17:10:07,547 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 36 selfloop transitions, 3 changer transitions 106/150 dead transitions. [2024-01-31 17:10:07,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 150 transitions, 1714 flow [2024-01-31 17:10:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:10:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:10:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-01-31 17:10:07,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816326530612245 [2024-01-31 17:10:07,549 INFO L175 Difference]: Start difference. First operand has 135 places, 133 transitions, 1375 flow. Second operand 7 states and 118 transitions. [2024-01-31 17:10:07,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 150 transitions, 1714 flow [2024-01-31 17:10:07,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 150 transitions, 1565 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-01-31 17:10:07,592 INFO L231 Difference]: Finished difference. Result has 131 places, 44 transitions, 253 flow [2024-01-31 17:10:07,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=131, PETRI_TRANSITIONS=44} [2024-01-31 17:10:07,592 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 94 predicate places. [2024-01-31 17:10:07,592 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 44 transitions, 253 flow [2024-01-31 17:10:07,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 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 17:10:07,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:07,593 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:07,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:10:07,808 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 17:10:07,809 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:07,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1249041626, now seen corresponding path program 9 times [2024-01-31 17:10:07,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:07,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888538036] [2024-01-31 17:10:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:07,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888538036] [2024-01-31 17:10:07,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888538036] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779543470] [2024-01-31 17:10:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:10:07,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:07,912 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 17:10:07,913 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 17:10:08,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:10:08,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:08,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:10:08,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:08,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:08,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779543470] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:08,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:08,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 17:10:08,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982501079] [2024-01-31 17:10:08,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:08,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:10:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:10:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:10:08,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 17:10:08,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 44 transitions, 253 flow. Second operand has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 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 17:10:08,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:08,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 17:10:08,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:08,719 INFO L124 PetriNetUnfolderBase]: 2914/4241 cut-off events. [2024-01-31 17:10:08,720 INFO L125 PetriNetUnfolderBase]: For 9919/9919 co-relation queries the response was YES. [2024-01-31 17:10:08,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15804 conditions, 4241 events. 2914/4241 cut-off events. For 9919/9919 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20775 event pairs, 737 based on Foata normal form. 20/3990 useless extension candidates. Maximal degree in co-relation 15771. Up to 1639 conditions per place. [2024-01-31 17:10:08,740 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 148 selfloop transitions, 22 changer transitions 0/174 dead transitions. [2024-01-31 17:10:08,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 174 transitions, 1355 flow [2024-01-31 17:10:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:10:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:10:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 191 transitions. [2024-01-31 17:10:08,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197802197802198 [2024-01-31 17:10:08,741 INFO L175 Difference]: Start difference. First operand has 131 places, 44 transitions, 253 flow. Second operand 13 states and 191 transitions. [2024-01-31 17:10:08,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 174 transitions, 1355 flow [2024-01-31 17:10:08,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 174 transitions, 1195 flow, removed 56 selfloop flow, removed 19 redundant places. [2024-01-31 17:10:08,756 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 349 flow [2024-01-31 17:10:08,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-01-31 17:10:08,757 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2024-01-31 17:10:08,757 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 349 flow [2024-01-31 17:10:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 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 17:10:08,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:08,757 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:08,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:10:08,968 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 17:10:08,969 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:08,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1701156466, now seen corresponding path program 10 times [2024-01-31 17:10:08,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:08,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206396096] [2024-01-31 17:10:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:10:09,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:09,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206396096] [2024-01-31 17:10:09,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206396096] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:09,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349294632] [2024-01-31 17:10:09,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:10:09,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:09,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:09,072 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 17:10:09,098 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 17:10:09,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:10:09,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:09,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:10:09,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:09,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:09,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349294632] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:09,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:09,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-01-31 17:10:09,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292293692] [2024-01-31 17:10:09,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:09,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:10:09,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:09,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:10:09,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:10:09,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-31 17:10:09,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 349 flow. Second operand has 17 states, 17 states have (on average 7.588235294117647) internal successors, (129), 17 states have internal predecessors, (129), 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 17:10:09,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:09,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-31 17:10:09,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:10,787 INFO L124 PetriNetUnfolderBase]: 7167/10271 cut-off events. [2024-01-31 17:10:10,787 INFO L125 PetriNetUnfolderBase]: For 18192/18192 co-relation queries the response was YES. [2024-01-31 17:10:10,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37638 conditions, 10271 events. 7167/10271 cut-off events. For 18192/18192 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 50583 event pairs, 189 based on Foata normal form. 24/10295 useless extension candidates. Maximal degree in co-relation 37616. Up to 3809 conditions per place. [2024-01-31 17:10:10,836 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 313 selfloop transitions, 179 changer transitions 0/493 dead transitions. [2024-01-31 17:10:10,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 493 transitions, 3820 flow [2024-01-31 17:10:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 17:10:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 17:10:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 492 transitions. [2024-01-31 17:10:10,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699248120300752 [2024-01-31 17:10:10,839 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 349 flow. Second operand 38 states and 492 transitions. [2024-01-31 17:10:10,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 493 transitions, 3820 flow [2024-01-31 17:10:10,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 493 transitions, 3807 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-01-31 17:10:10,869 INFO L231 Difference]: Finished difference. Result has 124 places, 223 transitions, 2153 flow [2024-01-31 17:10:10,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2153, PETRI_PLACES=124, PETRI_TRANSITIONS=223} [2024-01-31 17:10:10,871 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 87 predicate places. [2024-01-31 17:10:10,871 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 223 transitions, 2153 flow [2024-01-31 17:10:10,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.588235294117647) internal successors, (129), 17 states have internal predecessors, (129), 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 17:10:10,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:10,872 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:10,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-31 17:10:11,082 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 17:10:11,083 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:11,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash 393901252, now seen corresponding path program 11 times [2024-01-31 17:10:11,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:11,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817027512] [2024-01-31 17:10:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:11,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:11,204 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 17:10:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817027512] [2024-01-31 17:10:11,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817027512] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47816657] [2024-01-31 17:10:11,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:10:11,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:11,208 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 17:10:11,220 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 17:10:11,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:10:11,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:11,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:10:11,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:11,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:11,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47816657] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:11,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:11,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-01-31 17:10:11,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150523679] [2024-01-31 17:10:11,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:11,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:10:11,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:10:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:10:11,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-31 17:10:11,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 223 transitions, 2153 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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 17:10:11,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:11,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-31 17:10:11,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:13,715 INFO L124 PetriNetUnfolderBase]: 11178/15950 cut-off events. [2024-01-31 17:10:13,715 INFO L125 PetriNetUnfolderBase]: For 72017/72017 co-relation queries the response was YES. [2024-01-31 17:10:13,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72589 conditions, 15950 events. 11178/15950 cut-off events. For 72017/72017 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 84381 event pairs, 710 based on Foata normal form. 26/15976 useless extension candidates. Maximal degree in co-relation 72549. Up to 6495 conditions per place. [2024-01-31 17:10:13,797 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 361 selfloop transitions, 477 changer transitions 0/839 dead transitions. [2024-01-31 17:10:13,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 839 transitions, 8581 flow [2024-01-31 17:10:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 17:10:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 17:10:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 595 transitions. [2024-01-31 17:10:13,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-01-31 17:10:13,828 INFO L175 Difference]: Start difference. First operand has 124 places, 223 transitions, 2153 flow. Second operand 44 states and 595 transitions. [2024-01-31 17:10:13,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 839 transitions, 8581 flow [2024-01-31 17:10:14,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 839 transitions, 8370 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-01-31 17:10:14,316 INFO L231 Difference]: Finished difference. Result has 180 places, 544 transitions, 6793 flow [2024-01-31 17:10:14,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6793, PETRI_PLACES=180, PETRI_TRANSITIONS=544} [2024-01-31 17:10:14,317 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 143 predicate places. [2024-01-31 17:10:14,317 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 544 transitions, 6793 flow [2024-01-31 17:10:14,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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 17:10:14,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:14,317 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:14,330 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 17:10:14,528 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 17:10:14,528 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:14,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash 818080582, now seen corresponding path program 12 times [2024-01-31 17:10:14,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:14,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284245200] [2024-01-31 17:10:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:14,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:14,624 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 17:10:14,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:14,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284245200] [2024-01-31 17:10:14,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284245200] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:14,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018520183] [2024-01-31 17:10:14,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:10:14,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:14,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:14,626 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 17:10:14,662 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 17:10:14,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:10:14,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:14,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:10:14,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:14,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:14,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018520183] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:14,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:14,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-01-31 17:10:14,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774367635] [2024-01-31 17:10:14,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:14,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:10:14,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:14,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:10:14,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:10:14,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-31 17:10:14,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 544 transitions, 6793 flow. Second operand has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 18 states have internal predecessors, (122), 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 17:10:14,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:14,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-31 17:10:14,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:19,712 INFO L124 PetriNetUnfolderBase]: 16832/23800 cut-off events. [2024-01-31 17:10:19,713 INFO L125 PetriNetUnfolderBase]: For 156170/156170 co-relation queries the response was YES. [2024-01-31 17:10:19,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124588 conditions, 23800 events. 16832/23800 cut-off events. For 156170/156170 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 130464 event pairs, 591 based on Foata normal form. 26/23826 useless extension candidates. Maximal degree in co-relation 124530. Up to 9627 conditions per place. [2024-01-31 17:10:19,968 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 797 selfloop transitions, 746 changer transitions 0/1544 dead transitions. [2024-01-31 17:10:19,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1544 transitions, 17932 flow [2024-01-31 17:10:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-01-31 17:10:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-01-31 17:10:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1368 transitions. [2024-01-31 17:10:19,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386987270155587 [2024-01-31 17:10:19,971 INFO L175 Difference]: Start difference. First operand has 180 places, 544 transitions, 6793 flow. Second operand 101 states and 1368 transitions. [2024-01-31 17:10:19,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1544 transitions, 17932 flow [2024-01-31 17:10:21,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1544 transitions, 17085 flow, removed 255 selfloop flow, removed 6 redundant places. [2024-01-31 17:10:21,804 INFO L231 Difference]: Finished difference. Result has 310 places, 897 transitions, 13128 flow [2024-01-31 17:10:21,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=13128, PETRI_PLACES=310, PETRI_TRANSITIONS=897} [2024-01-31 17:10:21,808 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 273 predicate places. [2024-01-31 17:10:21,808 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 897 transitions, 13128 flow [2024-01-31 17:10:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 18 states have internal predecessors, (122), 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 17:10:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:21,809 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:21,822 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 17:10:22,010 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 17:10:22,011 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:22,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash 132418024, now seen corresponding path program 13 times [2024-01-31 17:10:22,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:22,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204868004] [2024-01-31 17:10:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:22,125 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 17:10:22,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:22,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204868004] [2024-01-31 17:10:22,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204868004] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:22,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659437741] [2024-01-31 17:10:22,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:10:22,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:22,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:22,128 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 17:10:22,138 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 17:10:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:22,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:10:22,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:22,343 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 17:10:22,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:22,437 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 17:10:22,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659437741] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:22,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:22,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-31 17:10:22,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86023503] [2024-01-31 17:10:22,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:22,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 17:10:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 17:10:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-01-31 17:10:22,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 17:10:22,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 897 transitions, 13128 flow. Second operand has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 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 17:10:22,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:22,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 17:10:22,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:27,191 INFO L124 PetriNetUnfolderBase]: 13882/19826 cut-off events. [2024-01-31 17:10:27,192 INFO L125 PetriNetUnfolderBase]: For 150385/150385 co-relation queries the response was YES. [2024-01-31 17:10:27,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114457 conditions, 19826 events. 13882/19826 cut-off events. For 150385/150385 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 116105 event pairs, 1141 based on Foata normal form. 20/19842 useless extension candidates. Maximal degree in co-relation 114363. Up to 9035 conditions per place. [2024-01-31 17:10:27,394 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 659 selfloop transitions, 605 changer transitions 0/1268 dead transitions. [2024-01-31 17:10:27,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1268 transitions, 19259 flow [2024-01-31 17:10:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:10:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:10:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 434 transitions. [2024-01-31 17:10:27,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-01-31 17:10:27,396 INFO L175 Difference]: Start difference. First operand has 310 places, 897 transitions, 13128 flow. Second operand 27 states and 434 transitions. [2024-01-31 17:10:27,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1268 transitions, 19259 flow [2024-01-31 17:10:29,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1268 transitions, 17323 flow, removed 538 selfloop flow, removed 16 redundant places. [2024-01-31 17:10:29,951 INFO L231 Difference]: Finished difference. Result has 327 places, 1012 transitions, 14839 flow [2024-01-31 17:10:29,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14839, PETRI_PLACES=327, PETRI_TRANSITIONS=1012} [2024-01-31 17:10:29,952 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 290 predicate places. [2024-01-31 17:10:29,952 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 1012 transitions, 14839 flow [2024-01-31 17:10:29,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 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 17:10:29,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:29,953 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:29,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-31 17:10:30,162 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 17:10:30,163 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:30,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash 837350210, now seen corresponding path program 14 times [2024-01-31 17:10:30,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:30,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299079851] [2024-01-31 17:10:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:30,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:30,273 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 17:10:30,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:30,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299079851] [2024-01-31 17:10:30,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299079851] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:30,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726128727] [2024-01-31 17:10:30,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:10:30,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:30,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:30,275 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 17:10:30,300 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 17:10:30,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:10:30,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:30,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:10:30,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:30,490 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 17:10:30,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:30,603 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 17:10:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726128727] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:30,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-31 17:10:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942041698] [2024-01-31 17:10:30,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:30,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 17:10:30,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 17:10:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-01-31 17:10:30,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 17:10:30,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 1012 transitions, 14839 flow. Second operand has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 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 17:10:30,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:30,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 17:10:30,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:35,522 INFO L124 PetriNetUnfolderBase]: 15296/21845 cut-off events. [2024-01-31 17:10:35,522 INFO L125 PetriNetUnfolderBase]: For 162249/162249 co-relation queries the response was YES. [2024-01-31 17:10:35,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124340 conditions, 21845 events. 15296/21845 cut-off events. For 162249/162249 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 129716 event pairs, 1979 based on Foata normal form. 18/21859 useless extension candidates. Maximal degree in co-relation 124251. Up to 10071 conditions per place. [2024-01-31 17:10:35,738 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 728 selfloop transitions, 538 changer transitions 0/1270 dead transitions. [2024-01-31 17:10:35,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1270 transitions, 19788 flow [2024-01-31 17:10:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:10:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:10:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 295 transitions. [2024-01-31 17:10:35,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44360902255639095 [2024-01-31 17:10:35,740 INFO L175 Difference]: Start difference. First operand has 327 places, 1012 transitions, 14839 flow. Second operand 19 states and 295 transitions. [2024-01-31 17:10:35,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1270 transitions, 19788 flow [2024-01-31 17:10:37,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1270 transitions, 19177 flow, removed 77 selfloop flow, removed 15 redundant places. [2024-01-31 17:10:37,855 INFO L231 Difference]: Finished difference. Result has 335 places, 1084 transitions, 17051 flow [2024-01-31 17:10:37,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14228, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=17051, PETRI_PLACES=335, PETRI_TRANSITIONS=1084} [2024-01-31 17:10:37,856 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 298 predicate places. [2024-01-31 17:10:37,856 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1084 transitions, 17051 flow [2024-01-31 17:10:37,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 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 17:10:37,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:37,857 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:37,868 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 17:10:38,061 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 17:10:38,062 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:38,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash -9076676, now seen corresponding path program 15 times [2024-01-31 17:10:38,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:38,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889128407] [2024-01-31 17:10:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:38,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:38,179 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 17:10:38,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:38,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889128407] [2024-01-31 17:10:38,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889128407] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:38,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922464644] [2024-01-31 17:10:38,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:10:38,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:38,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:38,181 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 17:10:38,183 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 17:10:38,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:10:38,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:38,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:10:38,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:38,369 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 17:10:38,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:38,451 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 17:10:38,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922464644] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:38,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:38,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:10:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557388227] [2024-01-31 17:10:38,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:38,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:10:38,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:10:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:10:38,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 17:10:38,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1084 transitions, 17051 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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 17:10:38,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:38,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 17:10:38,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:43,421 INFO L124 PetriNetUnfolderBase]: 15444/22009 cut-off events. [2024-01-31 17:10:43,421 INFO L125 PetriNetUnfolderBase]: For 204593/204593 co-relation queries the response was YES. [2024-01-31 17:10:43,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130396 conditions, 22009 events. 15444/22009 cut-off events. For 204593/204593 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 129984 event pairs, 2001 based on Foata normal form. 20/22025 useless extension candidates. Maximal degree in co-relation 130309. Up to 10221 conditions per place. [2024-01-31 17:10:43,638 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 696 selfloop transitions, 529 changer transitions 0/1229 dead transitions. [2024-01-31 17:10:43,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1229 transitions, 20416 flow [2024-01-31 17:10:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:10:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:10:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 257 transitions. [2024-01-31 17:10:43,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319327731092437 [2024-01-31 17:10:43,640 INFO L175 Difference]: Start difference. First operand has 335 places, 1084 transitions, 17051 flow. Second operand 17 states and 257 transitions. [2024-01-31 17:10:43,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1229 transitions, 20416 flow [2024-01-31 17:10:46,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1229 transitions, 20238 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-01-31 17:10:46,213 INFO L231 Difference]: Finished difference. Result has 345 places, 1090 transitions, 18102 flow [2024-01-31 17:10:46,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=16897, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18102, PETRI_PLACES=345, PETRI_TRANSITIONS=1090} [2024-01-31 17:10:46,214 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 308 predicate places. [2024-01-31 17:10:46,214 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1090 transitions, 18102 flow [2024-01-31 17:10:46,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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 17:10:46,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:46,214 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:46,225 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 17:10:46,425 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 17:10:46,426 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:46,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1081884480, now seen corresponding path program 16 times [2024-01-31 17:10:46,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:46,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241909731] [2024-01-31 17:10:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:46,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:46,550 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 17:10:46,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:46,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241909731] [2024-01-31 17:10:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241909731] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:46,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348147621] [2024-01-31 17:10:46,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:10:46,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:46,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:46,552 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 17:10:46,554 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 17:10:46,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:10:46,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:46,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:10:46,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:46,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:46,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348147621] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:46,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:46,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-01-31 17:10:46,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844340449] [2024-01-31 17:10:46,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:46,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:10:46,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:46,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:10:46,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:10:46,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-31 17:10:46,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1090 transitions, 18102 flow. Second operand has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 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 17:10:46,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:46,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-31 17:10:46,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:57,522 INFO L124 PetriNetUnfolderBase]: 32577/45915 cut-off events. [2024-01-31 17:10:57,522 INFO L125 PetriNetUnfolderBase]: For 475091/475091 co-relation queries the response was YES. [2024-01-31 17:10:58,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275996 conditions, 45915 events. 32577/45915 cut-off events. For 475091/475091 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 274798 event pairs, 2729 based on Foata normal form. 24/45939 useless extension candidates. Maximal degree in co-relation 275910. Up to 19291 conditions per place. [2024-01-31 17:10:58,282 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 801 selfloop transitions, 1229 changer transitions 0/2031 dead transitions. [2024-01-31 17:10:58,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2031 transitions, 33243 flow [2024-01-31 17:10:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-01-31 17:10:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-01-31 17:10:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 918 transitions. [2024-01-31 17:10:58,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-01-31 17:10:58,285 INFO L175 Difference]: Start difference. First operand has 345 places, 1090 transitions, 18102 flow. Second operand 68 states and 918 transitions. [2024-01-31 17:10:58,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2031 transitions, 33243 flow [2024-01-31 17:11:06,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 2031 transitions, 32713 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 17:11:06,855 INFO L231 Difference]: Finished difference. Result has 434 places, 1579 transitions, 30062 flow [2024-01-31 17:11:06,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=17731, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=30062, PETRI_PLACES=434, PETRI_TRANSITIONS=1579} [2024-01-31 17:11:06,857 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 397 predicate places. [2024-01-31 17:11:06,857 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1579 transitions, 30062 flow [2024-01-31 17:11:06,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 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 17:11:06,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:11:06,857 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:11:06,869 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 17:11:07,068 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 17:11:07,068 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:11:07,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:11:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1945710028, now seen corresponding path program 17 times [2024-01-31 17:11:07,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:11:07,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970678915] [2024-01-31 17:11:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:11:07,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:11:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:11:07,154 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 17:11:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:11:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970678915] [2024-01-31 17:11:07,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970678915] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:11:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192897900] [2024-01-31 17:11:07,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:11:07,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:07,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:11:07,155 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 17:11:07,159 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 17:11:07,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:11:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:11:07,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:11:07,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:11:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:11:07,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:11:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:11:07,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192897900] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:11:07,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:11:07,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-01-31 17:11:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757820701] [2024-01-31 17:11:07,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:11:07,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:11:07,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:11:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:11:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:11:07,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-31 17:11:07,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1579 transitions, 30062 flow. Second operand has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 states have internal predecessors, (128), 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 17:11:07,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:11:07,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-31 17:11:07,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand