./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.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/chl-name-comparator-symm.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/chl-name-comparator-symm.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-name-comparator-symm.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 16:48:32,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:48:32,072 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:48:32,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:48:32,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:48:32,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:48:32,101 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:48:32,102 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:48:32,102 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:48:32,106 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:48:32,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:48:32,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:48:32,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:48:32,108 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:48:32,108 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:48:32,108 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:48:32,109 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:48:32,109 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:48:32,109 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:48:32,109 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:48:32,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:48:32,110 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:48:32,110 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:48:32,110 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:48:32,111 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:48:32,111 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:48:32,111 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:48:32,111 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:48:32,112 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:48:32,112 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:48:32,113 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:48:32,113 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:48:32,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:48:32,114 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:48:32,114 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:48:32,114 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:48:32,114 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:48:32,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:48:32,115 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:48:32,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:48:32,115 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:48:32,115 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:48:32,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:48:32,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:48:32,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:48:32,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:48:32,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:48:32,391 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:48:32,393 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:48:32,394 INFO L431 ainManager$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/chl-name-comparator-symm.wvr.yml/witness.yml [2024-01-31 16:48:32,536 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:48:32,536 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:48:32,537 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2024-01-31 16:48:33,588 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:48:33,744 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:48:33,745 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2024-01-31 16:48:33,753 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43e7d844a/a5d79cc01cfd47968503fa58b188d366/FLAG32324b4d2 [2024-01-31 16:48:33,764 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43e7d844a/a5d79cc01cfd47968503fa58b188d366 [2024-01-31 16:48:33,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:48:33,766 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:48:33,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:48:33,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:48:33,770 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:48:33,771 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:48:32" (1/2) ... [2024-01-31 16:48:33,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d8d77 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:48:33, skipping insertion in model container [2024-01-31 16:48:33,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:48:32" (1/2) ... [2024-01-31 16:48:33,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e241a0a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:48:33, skipping insertion in model container [2024-01-31 16:48:33,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:48:33" (2/2) ... [2024-01-31 16:48:33,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d8d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:33, skipping insertion in model container [2024-01-31 16:48:33,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:48:33" (2/2) ... [2024-01-31 16:48:33,775 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:48:33,821 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 16:48:33,846 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:48:33,968 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/chl-name-comparator-symm.wvr.c[3882,3895] [2024-01-31 16:48:33,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:48:33,991 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:48:34,028 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/chl-name-comparator-symm.wvr.c[3882,3895] [2024-01-31 16:48:34,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:48:34,047 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:48:34,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34 WrapperNode [2024-01-31 16:48:34,048 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:48:34,049 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:48:34,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:48:34,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:48:34,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,098 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 229 [2024-01-31 16:48:34,098 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:48:34,099 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:48:34,099 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:48:34,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:48:34,109 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,124 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,144 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-31 16:48:34,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,144 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,150 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,162 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:48:34,171 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:48:34,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:48:34,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:48:34,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (1/1) ... [2024-01-31 16:48:34,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:48:34,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:34,207 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 16:48:34,224 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 16:48:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:48:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:48:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:48:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:48:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:48:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:48:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:48:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:48:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:48:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:48:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 16:48:34,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:48:34,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:48:34,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:48:34,287 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 16:48:34,412 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:48:34,413 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:48:34,691 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:48:34,691 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:48:34,977 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:48:34,977 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 16:48:34,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:48:34 BoogieIcfgContainer [2024-01-31 16:48:34,978 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:48:34,982 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:48:34,982 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:48:34,985 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:48:34,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:48:32" (1/4) ... [2024-01-31 16:48:34,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbc9611 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:48:34, skipping insertion in model container [2024-01-31 16:48:34,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:48:33" (2/4) ... [2024-01-31 16:48:34,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbc9611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:48:34, skipping insertion in model container [2024-01-31 16:48:34,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:34" (3/4) ... [2024-01-31 16:48:34,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbc9611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:48:34, skipping insertion in model container [2024-01-31 16:48:34,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:48:34" (4/4) ... [2024-01-31 16:48:34,988 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2024-01-31 16:48:35,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:48:35,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:48:35,003 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:48:35,051 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:48:35,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 27 transitions, 68 flow [2024-01-31 16:48:35,112 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2024-01-31 16:48:35,113 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:48:35,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 5/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-01-31 16:48:35,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 27 transitions, 68 flow [2024-01-31 16:48:35,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 24 transitions, 60 flow [2024-01-31 16:48:35,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:48:35,138 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;@22a7fb3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:48:35,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 16:48:35,152 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:48:35,152 INFO L124 PetriNetUnfolderBase]: 5/23 cut-off events. [2024-01-31 16:48:35,152 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:48:35,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:35,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:35,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:35,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:35,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1350873164, now seen corresponding path program 1 times [2024-01-31 16:48:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:35,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11544517] [2024-01-31 16:48:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:35,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:35,446 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 16:48:35,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:35,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11544517] [2024-01-31 16:48:35,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11544517] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:35,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:35,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:48:35,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229803550] [2024-01-31 16:48:35,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:35,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 16:48:35,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 16:48:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 16:48:35,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:35,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 16:48:35,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:35,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:35,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:35,570 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2024-01-31 16:48:35,570 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-31 16:48:35,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 126 events. 66/126 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 321 event pairs, 45 based on Foata normal form. 20/122 useless extension candidates. Maximal degree in co-relation 207. Up to 119 conditions per place. [2024-01-31 16:48:35,573 INFO L140 encePairwiseOnDemand]: 25/27 looper letters, 19 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2024-01-31 16:48:35,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 22 transitions, 94 flow [2024-01-31 16:48:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 16:48:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 16:48:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 31 transitions. [2024-01-31 16:48:35,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-01-31 16:48:35,585 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 60 flow. Second operand 2 states and 31 transitions. [2024-01-31 16:48:35,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 22 transitions, 94 flow [2024-01-31 16:48:35,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:48:35,590 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 48 flow [2024-01-31 16:48:35,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=48, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2024-01-31 16:48:35,593 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2024-01-31 16:48:35,594 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 48 flow [2024-01-31 16:48:35,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 16:48:35,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:35,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:35,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:48:35,595 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:35,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1299153842, now seen corresponding path program 1 times [2024-01-31 16:48:35,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:35,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550810160] [2024-01-31 16:48:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:35,763 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 16:48:35,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:35,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550810160] [2024-01-31 16:48:35,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550810160] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:35,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:35,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:48:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630784827] [2024-01-31 16:48:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:48:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:48:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:48:35,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:35,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 16:48:35,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:35,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:35,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:35,841 INFO L124 PetriNetUnfolderBase]: 66/127 cut-off events. [2024-01-31 16:48:35,842 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:48:35,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 127 events. 66/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 318 event pairs, 45 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 251. Up to 119 conditions per place. [2024-01-31 16:48:35,844 INFO L140 encePairwiseOnDemand]: 24/27 looper letters, 18 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2024-01-31 16:48:35,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 90 flow [2024-01-31 16:48:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:48:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:48:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2024-01-31 16:48:35,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-31 16:48:35,847 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 48 flow. Second operand 3 states and 36 transitions. [2024-01-31 16:48:35,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 90 flow [2024-01-31 16:48:35,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:48:35,850 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 60 flow [2024-01-31 16:48:35,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2024-01-31 16:48:35,853 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2024-01-31 16:48:35,853 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 60 flow [2024-01-31 16:48:35,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 16:48:35,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:35,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:48:35,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:35,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1315303079, now seen corresponding path program 1 times [2024-01-31 16:48:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:35,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804276695] [2024-01-31 16:48:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:35,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:35,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804276695] [2024-01-31 16:48:35,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804276695] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764329015] [2024-01-31 16:48:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:35,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:35,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:35,991 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 16:48:36,023 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 16:48:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:36,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:48:36,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:36,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:36,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764329015] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:36,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:36,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-31 16:48:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131597886] [2024-01-31 16:48:36,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:36,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:48:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:36,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:48:36,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:48:36,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:36,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 60 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 16:48:36,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:36,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:36,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:36,265 INFO L124 PetriNetUnfolderBase]: 66/129 cut-off events. [2024-01-31 16:48:36,265 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:48:36,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 129 events. 66/129 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 319 event pairs, 45 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 262. Up to 119 conditions per place. [2024-01-31 16:48:36,267 INFO L140 encePairwiseOnDemand]: 24/27 looper letters, 18 selfloop transitions, 4 changer transitions 0/25 dead transitions. [2024-01-31 16:48:36,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 112 flow [2024-01-31 16:48:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2024-01-31 16:48:36,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-01-31 16:48:36,268 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 60 flow. Second operand 5 states and 49 transitions. [2024-01-31 16:48:36,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 112 flow [2024-01-31 16:48:36,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 108 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:48:36,270 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 82 flow [2024-01-31 16:48:36,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-01-31 16:48:36,270 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-01-31 16:48:36,271 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 82 flow [2024-01-31 16:48:36,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 16:48:36,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:36,271 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:36,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:36,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:36,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:36,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:36,484 INFO L85 PathProgramCache]: Analyzing trace with hash -155476999, now seen corresponding path program 2 times [2024-01-31 16:48:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:36,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637975429] [2024-01-31 16:48:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:36,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:36,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637975429] [2024-01-31 16:48:36,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637975429] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:36,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:36,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:48:36,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780534863] [2024-01-31 16:48:36,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:36,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:48:36,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:36,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:48:36,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:48:36,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:36,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 16:48:36,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:36,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:36,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:37,013 INFO L124 PetriNetUnfolderBase]: 154/316 cut-off events. [2024-01-31 16:48:37,013 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-31 16:48:37,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 316 events. 154/316 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1333 event pairs, 45 based on Foata normal form. 1/264 useless extension candidates. Maximal degree in co-relation 626. Up to 128 conditions per place. [2024-01-31 16:48:37,018 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 41 selfloop transitions, 4 changer transitions 8/56 dead transitions. [2024-01-31 16:48:37,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 257 flow [2024-01-31 16:48:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-01-31 16:48:37,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2024-01-31 16:48:37,020 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 82 flow. Second operand 5 states and 77 transitions. [2024-01-31 16:48:37,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 257 flow [2024-01-31 16:48:37,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 247 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-31 16:48:37,023 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 101 flow [2024-01-31 16:48:37,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2024-01-31 16:48:37,024 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2024-01-31 16:48:37,024 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 101 flow [2024-01-31 16:48:37,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 16:48:37,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:37,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:37,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:48:37,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:37,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:37,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1816498665, now seen corresponding path program 3 times [2024-01-31 16:48:37,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:37,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874351499] [2024-01-31 16:48:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:37,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:37,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:37,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874351499] [2024-01-31 16:48:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874351499] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:37,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:37,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:48:37,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507743474] [2024-01-31 16:48:37,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:37,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:48:37,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:37,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:48:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:48:37,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:37,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 16:48:37,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:37,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:37,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:37,507 INFO L124 PetriNetUnfolderBase]: 246/510 cut-off events. [2024-01-31 16:48:37,508 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-01-31 16:48:37,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 510 events. 246/510 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2554 event pairs, 108 based on Foata normal form. 3/501 useless extension candidates. Maximal degree in co-relation 1193. Up to 273 conditions per place. [2024-01-31 16:48:37,510 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 43 selfloop transitions, 4 changer transitions 7/57 dead transitions. [2024-01-31 16:48:37,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 304 flow [2024-01-31 16:48:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-01-31 16:48:37,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2024-01-31 16:48:37,514 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 101 flow. Second operand 5 states and 71 transitions. [2024-01-31 16:48:37,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 304 flow [2024-01-31 16:48:37,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 296 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-31 16:48:37,525 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 124 flow [2024-01-31 16:48:37,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2024-01-31 16:48:37,528 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2024-01-31 16:48:37,528 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 124 flow [2024-01-31 16:48:37,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 16:48:37,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:37,528 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:37,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:48:37,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:37,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:37,529 INFO L85 PathProgramCache]: Analyzing trace with hash 487812585, now seen corresponding path program 4 times [2024-01-31 16:48:37,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:37,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411672801] [2024-01-31 16:48:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:37,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:37,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:37,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411672801] [2024-01-31 16:48:37,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411672801] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:37,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:37,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:48:37,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374653153] [2024-01-31 16:48:37,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:37,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:48:37,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:48:37,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:48:37,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:37,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 16:48:37,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:37,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:37,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:37,963 INFO L124 PetriNetUnfolderBase]: 230/464 cut-off events. [2024-01-31 16:48:37,964 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2024-01-31 16:48:37,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 464 events. 230/464 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2246 event pairs, 93 based on Foata normal form. 5/467 useless extension candidates. Maximal degree in co-relation 1237. Up to 208 conditions per place. [2024-01-31 16:48:37,966 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 43 selfloop transitions, 4 changer transitions 9/59 dead transitions. [2024-01-31 16:48:37,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 337 flow [2024-01-31 16:48:37,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-01-31 16:48:37,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407407407407407 [2024-01-31 16:48:37,968 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 124 flow. Second operand 5 states and 73 transitions. [2024-01-31 16:48:37,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 337 flow [2024-01-31 16:48:37,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 325 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 16:48:37,972 INFO L231 Difference]: Finished difference. Result has 46 places, 31 transitions, 142 flow [2024-01-31 16:48:37,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=31} [2024-01-31 16:48:37,974 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2024-01-31 16:48:37,974 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 31 transitions, 142 flow [2024-01-31 16:48:37,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 16:48:37,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:37,975 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:37,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:48:37,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:37,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:37,976 INFO L85 PathProgramCache]: Analyzing trace with hash 533410953, now seen corresponding path program 5 times [2024-01-31 16:48:37,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:37,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539646585] [2024-01-31 16:48:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:37,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:38,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:38,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539646585] [2024-01-31 16:48:38,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539646585] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:38,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:38,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:48:38,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351886519] [2024-01-31 16:48:38,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:38,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:48:38,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:38,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:48:38,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:48:38,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:38,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 31 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 16:48:38,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:38,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:38,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:38,410 INFO L124 PetriNetUnfolderBase]: 250/494 cut-off events. [2024-01-31 16:48:38,410 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2024-01-31 16:48:38,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 494 events. 250/494 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2425 event pairs, 91 based on Foata normal form. 6/492 useless extension candidates. Maximal degree in co-relation 1423. Up to 254 conditions per place. [2024-01-31 16:48:38,413 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 43 selfloop transitions, 5 changer transitions 9/60 dead transitions. [2024-01-31 16:48:38,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 377 flow [2024-01-31 16:48:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-01-31 16:48:38,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407407407407407 [2024-01-31 16:48:38,415 INFO L175 Difference]: Start difference. First operand has 46 places, 31 transitions, 142 flow. Second operand 5 states and 73 transitions. [2024-01-31 16:48:38,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 377 flow [2024-01-31 16:48:38,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 355 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-31 16:48:38,417 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 172 flow [2024-01-31 16:48:38,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2024-01-31 16:48:38,418 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 24 predicate places. [2024-01-31 16:48:38,418 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 172 flow [2024-01-31 16:48:38,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 16:48:38,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:38,418 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:38,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:48:38,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:38,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1962656500, now seen corresponding path program 1 times [2024-01-31 16:48:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:38,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289551487] [2024-01-31 16:48:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289551487] [2024-01-31 16:48:38,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289551487] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644643698] [2024-01-31 16:48:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:38,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:38,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:38,512 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 16:48:38,548 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 16:48:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:38,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:48:38,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:38,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:38,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644643698] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:38,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:48:38,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-01-31 16:48:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425405405] [2024-01-31 16:48:38,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:38,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:48:38,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:48:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:48:38,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:38,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:38,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:38,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:38,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:38,800 INFO L124 PetriNetUnfolderBase]: 254/508 cut-off events. [2024-01-31 16:48:38,800 INFO L125 PetriNetUnfolderBase]: For 845/845 co-relation queries the response was YES. [2024-01-31 16:48:38,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 508 events. 254/508 cut-off events. For 845/845 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2535 event pairs, 18 based on Foata normal form. 8/512 useless extension candidates. Maximal degree in co-relation 1497. Up to 213 conditions per place. [2024-01-31 16:48:38,803 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 53 selfloop transitions, 6 changer transitions 2/64 dead transitions. [2024-01-31 16:48:38,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 416 flow [2024-01-31 16:48:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-01-31 16:48:38,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-01-31 16:48:38,805 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 172 flow. Second operand 5 states and 74 transitions. [2024-01-31 16:48:38,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 416 flow [2024-01-31 16:48:38,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 395 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-31 16:48:38,808 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 198 flow [2024-01-31 16:48:38,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2024-01-31 16:48:38,810 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2024-01-31 16:48:38,812 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 198 flow [2024-01-31 16:48:38,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:38,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:38,813 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:38,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 16:48:39,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-01-31 16:48:39,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:39,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1758600762, now seen corresponding path program 2 times [2024-01-31 16:48:39,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:39,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771880780] [2024-01-31 16:48:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771880780] [2024-01-31 16:48:39,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771880780] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:39,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:39,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:48:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222380729] [2024-01-31 16:48:39,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:39,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:48:39,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:48:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:48:39,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:39,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:39,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:39,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:39,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:39,247 INFO L124 PetriNetUnfolderBase]: 252/495 cut-off events. [2024-01-31 16:48:39,248 INFO L125 PetriNetUnfolderBase]: For 1071/1071 co-relation queries the response was YES. [2024-01-31 16:48:39,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 495 events. 252/495 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2415 event pairs, 99 based on Foata normal form. 2/495 useless extension candidates. Maximal degree in co-relation 1487. Up to 280 conditions per place. [2024-01-31 16:48:39,250 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 41 selfloop transitions, 7 changer transitions 4/55 dead transitions. [2024-01-31 16:48:39,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 375 flow [2024-01-31 16:48:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-01-31 16:48:39,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-01-31 16:48:39,251 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 198 flow. Second operand 5 states and 67 transitions. [2024-01-31 16:48:39,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 375 flow [2024-01-31 16:48:39,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 366 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:48:39,253 INFO L231 Difference]: Finished difference. Result has 56 places, 37 transitions, 228 flow [2024-01-31 16:48:39,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=56, PETRI_TRANSITIONS=37} [2024-01-31 16:48:39,255 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2024-01-31 16:48:39,255 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 37 transitions, 228 flow [2024-01-31 16:48:39,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:39,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:39,255 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:48:39,256 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:39,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1702883420, now seen corresponding path program 3 times [2024-01-31 16:48:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:39,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175455126] [2024-01-31 16:48:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:39,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:39,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175455126] [2024-01-31 16:48:39,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175455126] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:39,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707396768] [2024-01-31 16:48:39,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:39,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:39,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:39,350 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 16:48:39,352 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 16:48:39,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:48:39,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:39,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:48:39,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:39,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:39,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707396768] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:39,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:48:39,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-01-31 16:48:39,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377844771] [2024-01-31 16:48:39,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:39,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:48:39,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:39,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:48:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:48:39,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:39,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 37 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:39,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:39,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:39,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:39,671 INFO L124 PetriNetUnfolderBase]: 259/506 cut-off events. [2024-01-31 16:48:39,671 INFO L125 PetriNetUnfolderBase]: For 1221/1225 co-relation queries the response was YES. [2024-01-31 16:48:39,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 506 events. 259/506 cut-off events. For 1221/1225 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2428 event pairs, 54 based on Foata normal form. 12/518 useless extension candidates. Maximal degree in co-relation 1539. Up to 312 conditions per place. [2024-01-31 16:48:39,674 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 43 selfloop transitions, 10 changer transitions 3/59 dead transitions. [2024-01-31 16:48:39,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 415 flow [2024-01-31 16:48:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-01-31 16:48:39,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2024-01-31 16:48:39,675 INFO L175 Difference]: Start difference. First operand has 56 places, 37 transitions, 228 flow. Second operand 5 states and 68 transitions. [2024-01-31 16:48:39,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 415 flow [2024-01-31 16:48:39,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 408 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:48:39,678 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 267 flow [2024-01-31 16:48:39,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2024-01-31 16:48:39,679 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2024-01-31 16:48:39,679 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 267 flow [2024-01-31 16:48:39,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:39,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:39,679 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:39,692 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 16:48:39,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:39,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:39,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1544632518, now seen corresponding path program 1 times [2024-01-31 16:48:39,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:39,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748596792] [2024-01-31 16:48:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:39,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:39,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748596792] [2024-01-31 16:48:39,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748596792] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:39,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:39,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:48:39,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698509735] [2024-01-31 16:48:39,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:39,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:48:39,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:39,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:48:39,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:48:39,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:39,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:39,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:39,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:39,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:40,097 INFO L124 PetriNetUnfolderBase]: 276/549 cut-off events. [2024-01-31 16:48:40,098 INFO L125 PetriNetUnfolderBase]: For 1529/1529 co-relation queries the response was YES. [2024-01-31 16:48:40,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 549 events. 276/549 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2793 event pairs, 50 based on Foata normal form. 6/551 useless extension candidates. Maximal degree in co-relation 1725. Up to 209 conditions per place. [2024-01-31 16:48:40,100 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 46 selfloop transitions, 11 changer transitions 3/63 dead transitions. [2024-01-31 16:48:40,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 499 flow [2024-01-31 16:48:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-01-31 16:48:40,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-01-31 16:48:40,102 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 267 flow. Second operand 5 states and 67 transitions. [2024-01-31 16:48:40,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 499 flow [2024-01-31 16:48:40,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 481 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-31 16:48:40,105 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 309 flow [2024-01-31 16:48:40,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2024-01-31 16:48:40,105 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2024-01-31 16:48:40,105 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 309 flow [2024-01-31 16:48:40,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:40,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:40,106 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:48:40,106 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:40,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1927623878, now seen corresponding path program 2 times [2024-01-31 16:48:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:40,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912263481] [2024-01-31 16:48:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:40,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:40,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912263481] [2024-01-31 16:48:40,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912263481] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:40,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:40,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:48:40,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216945839] [2024-01-31 16:48:40,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:40,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:48:40,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:48:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:48:40,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:40,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:40,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:40,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:40,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:40,335 INFO L124 PetriNetUnfolderBase]: 272/533 cut-off events. [2024-01-31 16:48:40,335 INFO L125 PetriNetUnfolderBase]: For 1969/1973 co-relation queries the response was YES. [2024-01-31 16:48:40,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 533 events. 272/533 cut-off events. For 1969/1973 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2697 event pairs, 119 based on Foata normal form. 8/533 useless extension candidates. Maximal degree in co-relation 1771. Up to 296 conditions per place. [2024-01-31 16:48:40,338 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 36 selfloop transitions, 12 changer transitions 7/58 dead transitions. [2024-01-31 16:48:40,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 484 flow [2024-01-31 16:48:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-01-31 16:48:40,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-01-31 16:48:40,341 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 309 flow. Second operand 5 states and 64 transitions. [2024-01-31 16:48:40,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 484 flow [2024-01-31 16:48:40,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 469 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:48:40,345 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 344 flow [2024-01-31 16:48:40,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2024-01-31 16:48:40,346 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2024-01-31 16:48:40,346 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 344 flow [2024-01-31 16:48:40,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:40,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:40,346 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:40,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:48:40,347 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:40,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash 106878826, now seen corresponding path program 3 times [2024-01-31 16:48:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:40,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851635597] [2024-01-31 16:48:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:40,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:40,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851635597] [2024-01-31 16:48:40,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851635597] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672635942] [2024-01-31 16:48:40,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:40,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:40,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:40,439 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 16:48:40,459 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 16:48:40,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:48:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:40,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:48:40,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:40,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:40,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672635942] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:40,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:48:40,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-01-31 16:48:40,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939116016] [2024-01-31 16:48:40,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:40,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:48:40,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:40,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:48:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:48:40,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:40,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:40,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:40,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:40,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:40,754 INFO L124 PetriNetUnfolderBase]: 269/533 cut-off events. [2024-01-31 16:48:40,754 INFO L125 PetriNetUnfolderBase]: For 2149/2157 co-relation queries the response was YES. [2024-01-31 16:48:40,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 533 events. 269/533 cut-off events. For 2149/2157 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2696 event pairs, 42 based on Foata normal form. 14/543 useless extension candidates. Maximal degree in co-relation 1820. Up to 312 conditions per place. [2024-01-31 16:48:40,757 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 44 selfloop transitions, 11 changer transitions 3/61 dead transitions. [2024-01-31 16:48:40,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 535 flow [2024-01-31 16:48:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-01-31 16:48:40,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-01-31 16:48:40,758 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 344 flow. Second operand 5 states and 64 transitions. [2024-01-31 16:48:40,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 535 flow [2024-01-31 16:48:40,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 523 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:48:40,761 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 388 flow [2024-01-31 16:48:40,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2024-01-31 16:48:40,762 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2024-01-31 16:48:40,762 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 388 flow [2024-01-31 16:48:40,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 16:48:40,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:40,762 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:40,775 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 16:48:40,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:40,976 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:40,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash 144136431, now seen corresponding path program 1 times [2024-01-31 16:48:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:40,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20281453] [2024-01-31 16:48:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:41,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20281453] [2024-01-31 16:48:41,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20281453] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650255270] [2024-01-31 16:48:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:41,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:41,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:41,751 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 16:48:41,774 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 16:48:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:41,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:48:41,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:42,218 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 122 treesize of output 78 [2024-01-31 16:48:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:42,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:43,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:43,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 146 [2024-01-31 16:48:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650255270] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:43,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-01-31 16:48:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96400023] [2024-01-31 16:48:43,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:43,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:48:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:48:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:48:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 388 flow. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 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 16:48:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:43,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:43,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:45,000 INFO L124 PetriNetUnfolderBase]: 613/1199 cut-off events. [2024-01-31 16:48:45,001 INFO L125 PetriNetUnfolderBase]: For 4051/4051 co-relation queries the response was YES. [2024-01-31 16:48:45,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3917 conditions, 1199 events. 613/1199 cut-off events. For 4051/4051 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7233 event pairs, 89 based on Foata normal form. 7/1200 useless extension candidates. Maximal degree in co-relation 3892. Up to 227 conditions per place. [2024-01-31 16:48:45,007 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 113 selfloop transitions, 46 changer transitions 35/197 dead transitions. [2024-01-31 16:48:45,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 197 transitions, 1500 flow [2024-01-31 16:48:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:48:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:48:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 287 transitions. [2024-01-31 16:48:45,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42518518518518517 [2024-01-31 16:48:45,008 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 388 flow. Second operand 25 states and 287 transitions. [2024-01-31 16:48:45,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 197 transitions, 1500 flow [2024-01-31 16:48:45,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 197 transitions, 1475 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-31 16:48:45,015 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 832 flow [2024-01-31 16:48:45,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=832, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2024-01-31 16:48:45,015 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 68 predicate places. [2024-01-31 16:48:45,016 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 832 flow [2024-01-31 16:48:45,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 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 16:48:45,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:45,016 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:45,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 16:48:45,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 16:48:45,228 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:45,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash 672769139, now seen corresponding path program 2 times [2024-01-31 16:48:45,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:45,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931257426] [2024-01-31 16:48:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:45,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:45,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:45,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931257426] [2024-01-31 16:48:45,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931257426] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:45,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607017965] [2024-01-31 16:48:45,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:48:45,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:45,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:45,897 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 16:48:45,922 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 16:48:45,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:48:46,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:46,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:48:46,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:46,339 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 203 treesize of output 131 [2024-01-31 16:48:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:46,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:47,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:47,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 180 [2024-01-31 16:48:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:48,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607017965] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:48,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:48,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-01-31 16:48:48,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995954174] [2024-01-31 16:48:48,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:48,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:48:48,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:48:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:48:48,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:48,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 832 flow. Second operand has 20 states, 20 states have (on average 7.25) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:48,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:48,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:48,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:50,970 INFO L124 PetriNetUnfolderBase]: 852/1723 cut-off events. [2024-01-31 16:48:50,971 INFO L125 PetriNetUnfolderBase]: For 9451/9459 co-relation queries the response was YES. [2024-01-31 16:48:50,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6651 conditions, 1723 events. 852/1723 cut-off events. For 9451/9459 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11217 event pairs, 154 based on Foata normal form. 17/1734 useless extension candidates. Maximal degree in co-relation 6621. Up to 455 conditions per place. [2024-01-31 16:48:50,982 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 140 selfloop transitions, 98 changer transitions 27/268 dead transitions. [2024-01-31 16:48:50,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 268 transitions, 2452 flow [2024-01-31 16:48:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 16:48:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 16:48:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 360 transitions. [2024-01-31 16:48:50,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-31 16:48:50,984 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 832 flow. Second operand 32 states and 360 transitions. [2024-01-31 16:48:50,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 268 transitions, 2452 flow [2024-01-31 16:48:51,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 268 transitions, 2177 flow, removed 109 selfloop flow, removed 8 redundant places. [2024-01-31 16:48:51,006 INFO L231 Difference]: Finished difference. Result has 116 places, 148 transitions, 1580 flow [2024-01-31 16:48:51,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1580, PETRI_PLACES=116, PETRI_TRANSITIONS=148} [2024-01-31 16:48:51,006 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 90 predicate places. [2024-01-31 16:48:51,007 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 148 transitions, 1580 flow [2024-01-31 16:48:51,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.25) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:51,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:51,007 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:51,018 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 16:48:51,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:48:51,213 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:51,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:51,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1458214167, now seen corresponding path program 3 times [2024-01-31 16:48:51,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:51,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965332432] [2024-01-31 16:48:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:51,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:51,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:51,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965332432] [2024-01-31 16:48:51,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965332432] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:51,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143258803] [2024-01-31 16:48:51,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:51,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:51,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:51,836 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 16:48:51,862 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 16:48:51,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:48:51,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:51,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:48:51,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:52,104 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 116 treesize of output 76 [2024-01-31 16:48:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:52,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:53,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:53,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 173 [2024-01-31 16:48:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:53,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143258803] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:53,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:53,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-01-31 16:48:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994970654] [2024-01-31 16:48:53,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:48:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:48:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:48:53,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:53,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 148 transitions, 1580 flow. Second operand has 21 states, 21 states have (on average 7.333333333333333) internal successors, (154), 21 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:53,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:53,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:53,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:54,573 INFO L124 PetriNetUnfolderBase]: 866/1773 cut-off events. [2024-01-31 16:48:54,573 INFO L125 PetriNetUnfolderBase]: For 9761/9761 co-relation queries the response was YES. [2024-01-31 16:48:54,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6882 conditions, 1773 events. 866/1773 cut-off events. For 9761/9761 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11790 event pairs, 397 based on Foata normal form. 1/1768 useless extension candidates. Maximal degree in co-relation 6854. Up to 1148 conditions per place. [2024-01-31 16:48:54,583 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 126 selfloop transitions, 57 changer transitions 12/198 dead transitions. [2024-01-31 16:48:54,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 2249 flow [2024-01-31 16:48:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:48:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:48:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 138 transitions. [2024-01-31 16:48:54,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2024-01-31 16:48:54,586 INFO L175 Difference]: Start difference. First operand has 116 places, 148 transitions, 1580 flow. Second operand 13 states and 138 transitions. [2024-01-31 16:48:54,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 2249 flow [2024-01-31 16:48:54,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 198 transitions, 1830 flow, removed 205 selfloop flow, removed 5 redundant places. [2024-01-31 16:48:54,621 INFO L231 Difference]: Finished difference. Result has 125 places, 160 transitions, 1471 flow [2024-01-31 16:48:54,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1471, PETRI_PLACES=125, PETRI_TRANSITIONS=160} [2024-01-31 16:48:54,625 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 99 predicate places. [2024-01-31 16:48:54,625 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 160 transitions, 1471 flow [2024-01-31 16:48:54,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.333333333333333) internal successors, (154), 21 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:54,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:54,627 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:54,640 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 16:48:54,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:54,836 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:54,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1839343069, now seen corresponding path program 4 times [2024-01-31 16:48:54,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:54,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089210696] [2024-01-31 16:48:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:54,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089210696] [2024-01-31 16:48:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089210696] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484055833] [2024-01-31 16:48:55,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:48:55,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:55,444 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 16:48:55,445 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 16:48:55,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:48:55,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:55,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:48:55,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:55,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 78 [2024-01-31 16:48:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:56,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:56,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:56,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 206 [2024-01-31 16:48:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:57,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484055833] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:57,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:57,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2024-01-31 16:48:57,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021882927] [2024-01-31 16:48:57,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:57,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:48:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:57,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:48:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:48:57,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:48:57,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 160 transitions, 1471 flow. Second operand has 22 states, 22 states have (on average 7.2727272727272725) internal successors, (160), 22 states have internal predecessors, (160), 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 16:48:57,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:57,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:48:57,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:58,827 INFO L124 PetriNetUnfolderBase]: 929/1947 cut-off events. [2024-01-31 16:48:58,827 INFO L125 PetriNetUnfolderBase]: For 6550/6550 co-relation queries the response was YES. [2024-01-31 16:48:58,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6642 conditions, 1947 events. 929/1947 cut-off events. For 6550/6550 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13282 event pairs, 208 based on Foata normal form. 5/1940 useless extension candidates. Maximal degree in co-relation 6613. Up to 585 conditions per place. [2024-01-31 16:48:58,839 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 107 selfloop transitions, 103 changer transitions 24/237 dead transitions. [2024-01-31 16:48:58,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 237 transitions, 2213 flow [2024-01-31 16:48:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:48:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:48:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 235 transitions. [2024-01-31 16:48:58,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956228956228956 [2024-01-31 16:48:58,841 INFO L175 Difference]: Start difference. First operand has 125 places, 160 transitions, 1471 flow. Second operand 22 states and 235 transitions. [2024-01-31 16:48:58,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 237 transitions, 2213 flow [2024-01-31 16:48:58,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 237 transitions, 2171 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-01-31 16:48:58,860 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1782 flow [2024-01-31 16:48:58,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1782, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2024-01-31 16:48:58,860 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 119 predicate places. [2024-01-31 16:48:58,861 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1782 flow [2024-01-31 16:48:58,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.2727272727272725) internal successors, (160), 22 states have internal predecessors, (160), 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 16:48:58,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:58,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:58,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-31 16:48:59,072 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,SelfDestructingSolverStorable16 [2024-01-31 16:48:59,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:59,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash -651795431, now seen corresponding path program 5 times [2024-01-31 16:48:59,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:59,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098746428] [2024-01-31 16:48:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:59,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:59,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:59,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098746428] [2024-01-31 16:48:59,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098746428] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:59,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920554860] [2024-01-31 16:48:59,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:48:59,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:59,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:59,558 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 16:48:59,576 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 16:48:59,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:48:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:59,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 16:48:59,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:59,807 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 161 treesize of output 105 [2024-01-31 16:48:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:59,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:01,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:01,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 194 [2024-01-31 16:49:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:01,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920554860] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:01,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:01,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-01-31 16:49:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076781930] [2024-01-31 16:49:01,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:49:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:49:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:49:01,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:01,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1782 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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 16:49:01,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:01,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:01,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:04,032 INFO L124 PetriNetUnfolderBase]: 1096/2310 cut-off events. [2024-01-31 16:49:04,033 INFO L125 PetriNetUnfolderBase]: For 10300/10308 co-relation queries the response was YES. [2024-01-31 16:49:04,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8664 conditions, 2310 events. 1096/2310 cut-off events. For 10300/10308 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16618 event pairs, 363 based on Foata normal form. 19/2321 useless extension candidates. Maximal degree in co-relation 8631. Up to 928 conditions per place. [2024-01-31 16:49:04,049 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 189 selfloop transitions, 105 changer transitions 27/324 dead transitions. [2024-01-31 16:49:04,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 324 transitions, 3304 flow [2024-01-31 16:49:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:49:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:49:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 308 transitions. [2024-01-31 16:49:04,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224965706447188 [2024-01-31 16:49:04,053 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1782 flow. Second operand 27 states and 308 transitions. [2024-01-31 16:49:04,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 324 transitions, 3304 flow [2024-01-31 16:49:04,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 324 transitions, 3121 flow, removed 42 selfloop flow, removed 12 redundant places. [2024-01-31 16:49:04,085 INFO L231 Difference]: Finished difference. Result has 170 places, 205 transitions, 2383 flow [2024-01-31 16:49:04,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2383, PETRI_PLACES=170, PETRI_TRANSITIONS=205} [2024-01-31 16:49:04,086 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-01-31 16:49:04,086 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 205 transitions, 2383 flow [2024-01-31 16:49:04,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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 16:49:04,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:04,086 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:04,106 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 16:49:04,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 16:49:04,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:04,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1347812099, now seen corresponding path program 6 times [2024-01-31 16:49:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:04,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571252202] [2024-01-31 16:49:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:04,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:04,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:04,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571252202] [2024-01-31 16:49:04,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571252202] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:04,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942783403] [2024-01-31 16:49:04,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:49:04,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:04,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:04,817 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 16:49:04,818 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 16:49:04,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:49:04,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:04,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:49:04,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:05,178 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 137 treesize of output 89 [2024-01-31 16:49:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:05,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:06,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:06,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 188 [2024-01-31 16:49:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:06,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942783403] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:06,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:06,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-01-31 16:49:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143106750] [2024-01-31 16:49:06,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:06,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:49:06,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:49:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:49:06,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:06,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 205 transitions, 2383 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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 16:49:06,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:06,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:06,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:07,539 INFO L124 PetriNetUnfolderBase]: 1109/2376 cut-off events. [2024-01-31 16:49:07,540 INFO L125 PetriNetUnfolderBase]: For 13738/13746 co-relation queries the response was YES. [2024-01-31 16:49:07,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9312 conditions, 2376 events. 1109/2376 cut-off events. For 13738/13746 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17350 event pairs, 382 based on Foata normal form. 10/2366 useless extension candidates. Maximal degree in co-relation 9266. Up to 1253 conditions per place. [2024-01-31 16:49:07,554 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 166 selfloop transitions, 84 changer transitions 16/269 dead transitions. [2024-01-31 16:49:07,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 269 transitions, 3262 flow [2024-01-31 16:49:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:49:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:49:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 161 transitions. [2024-01-31 16:49:07,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-01-31 16:49:07,556 INFO L175 Difference]: Start difference. First operand has 170 places, 205 transitions, 2383 flow. Second operand 14 states and 161 transitions. [2024-01-31 16:49:07,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 269 transitions, 3262 flow [2024-01-31 16:49:07,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 269 transitions, 3085 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-01-31 16:49:07,603 INFO L231 Difference]: Finished difference. Result has 181 places, 220 transitions, 2601 flow [2024-01-31 16:49:07,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2601, PETRI_PLACES=181, PETRI_TRANSITIONS=220} [2024-01-31 16:49:07,603 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-01-31 16:49:07,604 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 220 transitions, 2601 flow [2024-01-31 16:49:07,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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 16:49:07,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:07,604 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:07,615 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 16:49:07,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:07,816 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:07,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1030540131, now seen corresponding path program 7 times [2024-01-31 16:49:07,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476034442] [2024-01-31 16:49:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:07,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:08,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:08,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476034442] [2024-01-31 16:49:08,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476034442] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:08,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689036503] [2024-01-31 16:49:08,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:49:08,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:08,364 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 16:49:08,391 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 16:49:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:08,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 16:49:08,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:08,736 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 203 treesize of output 131 [2024-01-31 16:49:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:08,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:10,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:10,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 159 [2024-01-31 16:49:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:10,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689036503] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:10,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:10,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-01-31 16:49:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181197833] [2024-01-31 16:49:10,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:10,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:49:10,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:49:10,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:49:10,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:10,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 220 transitions, 2601 flow. Second operand has 21 states, 21 states have (on average 7.333333333333333) internal successors, (154), 21 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:10,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:10,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:10,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:13,193 INFO L124 PetriNetUnfolderBase]: 1584/3539 cut-off events. [2024-01-31 16:49:13,193 INFO L125 PetriNetUnfolderBase]: For 22532/22532 co-relation queries the response was YES. [2024-01-31 16:49:13,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14296 conditions, 3539 events. 1584/3539 cut-off events. For 22532/22532 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28485 event pairs, 319 based on Foata normal form. 13/3538 useless extension candidates. Maximal degree in co-relation 14247. Up to 562 conditions per place. [2024-01-31 16:49:13,211 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 245 selfloop transitions, 152 changer transitions 41/441 dead transitions. [2024-01-31 16:49:13,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 441 transitions, 5349 flow [2024-01-31 16:49:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:49:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:49:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 347 transitions. [2024-01-31 16:49:13,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4145758661887694 [2024-01-31 16:49:13,213 INFO L175 Difference]: Start difference. First operand has 181 places, 220 transitions, 2601 flow. Second operand 31 states and 347 transitions. [2024-01-31 16:49:13,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 441 transitions, 5349 flow [2024-01-31 16:49:13,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 441 transitions, 5243 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-01-31 16:49:13,290 INFO L231 Difference]: Finished difference. Result has 222 places, 282 transitions, 3935 flow [2024-01-31 16:49:13,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3935, PETRI_PLACES=222, PETRI_TRANSITIONS=282} [2024-01-31 16:49:13,291 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 196 predicate places. [2024-01-31 16:49:13,291 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 282 transitions, 3935 flow [2024-01-31 16:49:13,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.333333333333333) internal successors, (154), 21 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:13,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:13,291 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:13,304 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 16:49:13,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:13,492 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:13,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1922851348, now seen corresponding path program 8 times [2024-01-31 16:49:13,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:13,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457803788] [2024-01-31 16:49:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:13,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:13,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:13,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457803788] [2024-01-31 16:49:13,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457803788] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:13,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938037167] [2024-01-31 16:49:13,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:49:13,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:13,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:13,785 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 16:49:13,788 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 16:49:13,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:49:13,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:13,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:49:13,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:14,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:14,133 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 16:49:14,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-01-31 16:49:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:14,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938037167] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:14,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:14,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-01-31 16:49:14,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763184297] [2024-01-31 16:49:14,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:14,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:49:14,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:49:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:49:14,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:14,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 282 transitions, 3935 flow. Second operand has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 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 16:49:14,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:14,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:14,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:14,865 INFO L124 PetriNetUnfolderBase]: 1647/3665 cut-off events. [2024-01-31 16:49:14,865 INFO L125 PetriNetUnfolderBase]: For 29992/29992 co-relation queries the response was YES. [2024-01-31 16:49:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16094 conditions, 3665 events. 1647/3665 cut-off events. For 29992/29992 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29614 event pairs, 367 based on Foata normal form. 20/3685 useless extension candidates. Maximal degree in co-relation 16030. Up to 1579 conditions per place. [2024-01-31 16:49:14,890 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 257 selfloop transitions, 87 changer transitions 4/351 dead transitions. [2024-01-31 16:49:14,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 351 transitions, 5361 flow [2024-01-31 16:49:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:49:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:49:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-01-31 16:49:14,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-01-31 16:49:14,891 INFO L175 Difference]: Start difference. First operand has 222 places, 282 transitions, 3935 flow. Second operand 9 states and 111 transitions. [2024-01-31 16:49:14,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 351 transitions, 5361 flow [2024-01-31 16:49:15,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 351 transitions, 4815 flow, removed 217 selfloop flow, removed 9 redundant places. [2024-01-31 16:49:15,017 INFO L231 Difference]: Finished difference. Result has 219 places, 290 transitions, 3882 flow [2024-01-31 16:49:15,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3882, PETRI_PLACES=219, PETRI_TRANSITIONS=290} [2024-01-31 16:49:15,018 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 193 predicate places. [2024-01-31 16:49:15,018 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 290 transitions, 3882 flow [2024-01-31 16:49:15,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 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 16:49:15,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:15,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:15,029 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 16:49:15,219 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,SelfDestructingSolverStorable20 [2024-01-31 16:49:15,219 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:15,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1472982096, now seen corresponding path program 9 times [2024-01-31 16:49:15,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:15,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085799863] [2024-01-31 16:49:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:15,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:15,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085799863] [2024-01-31 16:49:15,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085799863] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:15,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683492470] [2024-01-31 16:49:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:49:15,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:15,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:15,505 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 16:49:15,505 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 16:49:15,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:49:15,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:15,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:49:15,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:15,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:15,858 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 16:49:15,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-01-31 16:49:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683492470] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:15,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:15,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-01-31 16:49:15,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486862688] [2024-01-31 16:49:15,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:15,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:49:15,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:49:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:49:15,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:15,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 290 transitions, 3882 flow. Second operand has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 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 16:49:15,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:15,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:15,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:16,725 INFO L124 PetriNetUnfolderBase]: 1701/3788 cut-off events. [2024-01-31 16:49:16,725 INFO L125 PetriNetUnfolderBase]: For 25267/25267 co-relation queries the response was YES. [2024-01-31 16:49:16,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15796 conditions, 3788 events. 1701/3788 cut-off events. For 25267/25267 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30890 event pairs, 373 based on Foata normal form. 20/3808 useless extension candidates. Maximal degree in co-relation 15736. Up to 1565 conditions per place. [2024-01-31 16:49:16,749 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 253 selfloop transitions, 99 changer transitions 6/361 dead transitions. [2024-01-31 16:49:16,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 361 transitions, 5153 flow [2024-01-31 16:49:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:49:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:49:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-01-31 16:49:16,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511784511784512 [2024-01-31 16:49:16,753 INFO L175 Difference]: Start difference. First operand has 219 places, 290 transitions, 3882 flow. Second operand 11 states and 134 transitions. [2024-01-31 16:49:16,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 361 transitions, 5153 flow [2024-01-31 16:49:16,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 361 transitions, 5019 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-01-31 16:49:16,857 INFO L231 Difference]: Finished difference. Result has 224 places, 293 transitions, 4054 flow [2024-01-31 16:49:16,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3725, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4054, PETRI_PLACES=224, PETRI_TRANSITIONS=293} [2024-01-31 16:49:16,858 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 198 predicate places. [2024-01-31 16:49:16,858 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 293 transitions, 4054 flow [2024-01-31 16:49:16,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 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 16:49:16,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:16,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:16,869 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 16:49:17,069 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,SelfDestructingSolverStorable21 [2024-01-31 16:49:17,069 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:17,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1278159952, now seen corresponding path program 10 times [2024-01-31 16:49:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812244948] [2024-01-31 16:49:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:17,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:17,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812244948] [2024-01-31 16:49:17,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812244948] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:17,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486235181] [2024-01-31 16:49:17,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:49:17,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:17,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:17,373 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 16:49:17,375 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 16:49:17,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:49:17,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:17,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:49:17,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:17,628 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 91 treesize of output 59 [2024-01-31 16:49:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:17,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:17,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:17,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2024-01-31 16:49:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:17,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486235181] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:17,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:17,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2024-01-31 16:49:17,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377813373] [2024-01-31 16:49:17,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:17,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:49:17,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:49:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:49:17,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:17,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 293 transitions, 4054 flow. Second operand has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 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 16:49:17,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:17,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:17,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:19,409 INFO L124 PetriNetUnfolderBase]: 1863/4148 cut-off events. [2024-01-31 16:49:19,410 INFO L125 PetriNetUnfolderBase]: For 29964/29972 co-relation queries the response was YES. [2024-01-31 16:49:19,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17595 conditions, 4148 events. 1863/4148 cut-off events. For 29964/29972 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34365 event pairs, 185 based on Foata normal form. 34/4182 useless extension candidates. Maximal degree in co-relation 17534. Up to 656 conditions per place. [2024-01-31 16:49:19,436 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 244 selfloop transitions, 215 changer transitions 25/487 dead transitions. [2024-01-31 16:49:19,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 487 transitions, 6189 flow [2024-01-31 16:49:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:49:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:49:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 419 transitions. [2024-01-31 16:49:19,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194194194194194 [2024-01-31 16:49:19,441 INFO L175 Difference]: Start difference. First operand has 224 places, 293 transitions, 4054 flow. Second operand 37 states and 419 transitions. [2024-01-31 16:49:19,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 487 transitions, 6189 flow [2024-01-31 16:49:19,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 487 transitions, 5966 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-01-31 16:49:19,574 INFO L231 Difference]: Finished difference. Result has 260 places, 328 transitions, 4878 flow [2024-01-31 16:49:19,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4878, PETRI_PLACES=260, PETRI_TRANSITIONS=328} [2024-01-31 16:49:19,575 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 234 predicate places. [2024-01-31 16:49:19,575 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 328 transitions, 4878 flow [2024-01-31 16:49:19,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 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 16:49:19,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:19,576 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:19,589 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 16:49:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:19,787 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:19,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash 121390128, now seen corresponding path program 11 times [2024-01-31 16:49:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:19,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909817723] [2024-01-31 16:49:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:20,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:20,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909817723] [2024-01-31 16:49:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909817723] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:20,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917486608] [2024-01-31 16:49:20,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:49:20,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:20,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:20,053 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 16:49:20,054 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 16:49:20,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:49:20,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:20,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 16:49:20,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:20,231 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 112 treesize of output 72 [2024-01-31 16:49:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:20,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:20,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:20,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-01-31 16:49:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:20,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917486608] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:20,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:20,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-31 16:49:20,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79364213] [2024-01-31 16:49:20,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:20,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:49:20,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:20,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:49:20,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:49:20,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:20,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 328 transitions, 4878 flow. Second operand has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 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 16:49:20,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:20,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:20,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:21,618 INFO L124 PetriNetUnfolderBase]: 1964/4357 cut-off events. [2024-01-31 16:49:21,619 INFO L125 PetriNetUnfolderBase]: For 37538/37538 co-relation queries the response was YES. [2024-01-31 16:49:21,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19634 conditions, 4357 events. 1964/4357 cut-off events. For 37538/37538 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36620 event pairs, 621 based on Foata normal form. 20/4365 useless extension candidates. Maximal degree in co-relation 19564. Up to 1780 conditions per place. [2024-01-31 16:49:21,648 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 248 selfloop transitions, 173 changer transitions 13/437 dead transitions. [2024-01-31 16:49:21,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 437 transitions, 6392 flow [2024-01-31 16:49:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:49:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:49:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 259 transitions. [2024-01-31 16:49:21,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-01-31 16:49:21,657 INFO L175 Difference]: Start difference. First operand has 260 places, 328 transitions, 4878 flow. Second operand 21 states and 259 transitions. [2024-01-31 16:49:21,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 437 transitions, 6392 flow [2024-01-31 16:49:21,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 437 transitions, 5866 flow, removed 82 selfloop flow, removed 15 redundant places. [2024-01-31 16:49:21,840 INFO L231 Difference]: Finished difference. Result has 273 places, 348 transitions, 5272 flow [2024-01-31 16:49:21,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5272, PETRI_PLACES=273, PETRI_TRANSITIONS=348} [2024-01-31 16:49:21,841 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 247 predicate places. [2024-01-31 16:49:21,841 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 348 transitions, 5272 flow [2024-01-31 16:49:21,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 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 16:49:21,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:21,841 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:21,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:22,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:22,042 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:22,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:22,042 INFO L85 PathProgramCache]: Analyzing trace with hash -907270006, now seen corresponding path program 12 times [2024-01-31 16:49:22,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:22,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027102073] [2024-01-31 16:49:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:22,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:22,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:22,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027102073] [2024-01-31 16:49:22,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027102073] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:22,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962167541] [2024-01-31 16:49:22,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:49:22,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:22,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:22,335 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 16:49:22,337 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 16:49:22,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:49:22,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:22,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:49:22,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:22,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:22,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:22,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-01-31 16:49:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:22,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962167541] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:22,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:22,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-01-31 16:49:22,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168852428] [2024-01-31 16:49:22,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:22,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:49:22,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:49:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:49:22,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:22,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 348 transitions, 5272 flow. Second operand has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 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 16:49:22,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:22,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:22,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:23,819 INFO L124 PetriNetUnfolderBase]: 1954/4311 cut-off events. [2024-01-31 16:49:23,819 INFO L125 PetriNetUnfolderBase]: For 40808/40816 co-relation queries the response was YES. [2024-01-31 16:49:23,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19592 conditions, 4311 events. 1954/4311 cut-off events. For 40808/40816 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36027 event pairs, 394 based on Foata normal form. 32/4331 useless extension candidates. Maximal degree in co-relation 19514. Up to 1093 conditions per place. [2024-01-31 16:49:23,849 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 191 selfloop transitions, 195 changer transitions 12/401 dead transitions. [2024-01-31 16:49:23,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 401 transitions, 6233 flow [2024-01-31 16:49:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:49:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:49:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 205 transitions. [2024-01-31 16:49:23,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2024-01-31 16:49:23,856 INFO L175 Difference]: Start difference. First operand has 273 places, 348 transitions, 5272 flow. Second operand 20 states and 205 transitions. [2024-01-31 16:49:23,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 401 transitions, 6233 flow [2024-01-31 16:49:24,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 401 transitions, 5952 flow, removed 47 selfloop flow, removed 13 redundant places. [2024-01-31 16:49:24,069 INFO L231 Difference]: Finished difference. Result has 280 places, 344 transitions, 5356 flow [2024-01-31 16:49:24,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5356, PETRI_PLACES=280, PETRI_TRANSITIONS=344} [2024-01-31 16:49:24,070 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 254 predicate places. [2024-01-31 16:49:24,070 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 344 transitions, 5356 flow [2024-01-31 16:49:24,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 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 16:49:24,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:24,070 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:24,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:24,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-31 16:49:24,271 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:24,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:24,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2133803468, now seen corresponding path program 13 times [2024-01-31 16:49:24,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:24,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96433486] [2024-01-31 16:49:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:24,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:24,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96433486] [2024-01-31 16:49:24,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96433486] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:24,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398160559] [2024-01-31 16:49:24,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:49:24,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:24,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:24,596 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 16:49:24,620 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 16:49:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:24,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 16:49:24,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:24,732 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 16:49:24,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 16:49:24,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 16:49:24,868 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 91 treesize of output 59 [2024-01-31 16:49:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:24,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:25,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398160559] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:25,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:25,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 23 [2024-01-31 16:49:25,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363705949] [2024-01-31 16:49:25,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:25,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:49:25,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:49:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:49:25,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:25,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 344 transitions, 5356 flow. Second operand has 23 states, 23 states have (on average 7.217391304347826) internal successors, (166), 23 states have internal predecessors, (166), 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 16:49:25,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:25,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:25,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:26,269 INFO L124 PetriNetUnfolderBase]: 2039/4481 cut-off events. [2024-01-31 16:49:26,269 INFO L125 PetriNetUnfolderBase]: For 45217/45217 co-relation queries the response was YES. [2024-01-31 16:49:26,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20956 conditions, 4481 events. 2039/4481 cut-off events. For 45217/45217 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 37950 event pairs, 707 based on Foata normal form. 20/4471 useless extension candidates. Maximal degree in co-relation 20880. Up to 2388 conditions per place. [2024-01-31 16:49:26,293 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 249 selfloop transitions, 153 changer transitions 7/412 dead transitions. [2024-01-31 16:49:26,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 412 transitions, 6676 flow [2024-01-31 16:49:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:49:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:49:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 174 transitions. [2024-01-31 16:49:26,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-01-31 16:49:26,294 INFO L175 Difference]: Start difference. First operand has 280 places, 344 transitions, 5356 flow. Second operand 15 states and 174 transitions. [2024-01-31 16:49:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 412 transitions, 6676 flow [2024-01-31 16:49:26,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 412 transitions, 6534 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-01-31 16:49:26,495 INFO L231 Difference]: Finished difference. Result has 291 places, 359 transitions, 6027 flow [2024-01-31 16:49:26,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6027, PETRI_PLACES=291, PETRI_TRANSITIONS=359} [2024-01-31 16:49:26,496 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 265 predicate places. [2024-01-31 16:49:26,496 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 359 transitions, 6027 flow [2024-01-31 16:49:26,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.217391304347826) internal successors, (166), 23 states have internal predecessors, (166), 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 16:49:26,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:26,496 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:26,509 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 16:49:26,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 16:49:26,696 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:26,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1419103020, now seen corresponding path program 14 times [2024-01-31 16:49:26,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:26,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353131438] [2024-01-31 16:49:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:27,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353131438] [2024-01-31 16:49:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353131438] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457382643] [2024-01-31 16:49:27,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:49:27,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:27,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:27,275 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 16:49:27,302 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 16:49:27,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:49:27,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:27,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:49:27,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:27,629 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 112 treesize of output 72 [2024-01-31 16:49:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:27,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:27,809 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 16:49:27,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 42 [2024-01-31 16:49:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457382643] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:27,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:27,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 20 [2024-01-31 16:49:27,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714729426] [2024-01-31 16:49:27,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:27,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:49:27,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:49:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:49:27,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:27,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 359 transitions, 6027 flow. Second operand has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:27,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:27,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:27,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:29,097 INFO L124 PetriNetUnfolderBase]: 2046/4464 cut-off events. [2024-01-31 16:49:29,097 INFO L125 PetriNetUnfolderBase]: For 52198/52198 co-relation queries the response was YES. [2024-01-31 16:49:29,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21688 conditions, 4464 events. 2046/4464 cut-off events. For 52198/52198 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 37417 event pairs, 542 based on Foata normal form. 12/4472 useless extension candidates. Maximal degree in co-relation 21607. Up to 1116 conditions per place. [2024-01-31 16:49:29,129 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 239 selfloop transitions, 187 changer transitions 11/440 dead transitions. [2024-01-31 16:49:29,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 440 transitions, 7284 flow [2024-01-31 16:49:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:49:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:49:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 238 transitions. [2024-01-31 16:49:29,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832528180354267 [2024-01-31 16:49:29,131 INFO L175 Difference]: Start difference. First operand has 291 places, 359 transitions, 6027 flow. Second operand 23 states and 238 transitions. [2024-01-31 16:49:29,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 440 transitions, 7284 flow [2024-01-31 16:49:29,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 440 transitions, 7142 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-01-31 16:49:29,378 INFO L231 Difference]: Finished difference. Result has 303 places, 368 transitions, 6404 flow [2024-01-31 16:49:29,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5823, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6404, PETRI_PLACES=303, PETRI_TRANSITIONS=368} [2024-01-31 16:49:29,378 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 277 predicate places. [2024-01-31 16:49:29,378 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 368 transitions, 6404 flow [2024-01-31 16:49:29,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:29,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:29,379 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:29,389 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 16:49:29,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 16:49:29,589 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:29,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash -874801718, now seen corresponding path program 15 times [2024-01-31 16:49:29,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:29,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891118633] [2024-01-31 16:49:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:29,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:29,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:29,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891118633] [2024-01-31 16:49:29,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891118633] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:29,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046603273] [2024-01-31 16:49:29,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:49:29,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:29,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:29,822 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 16:49:29,828 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 16:49:29,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:49:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:29,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:49:29,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:30,134 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 82 treesize of output 50 [2024-01-31 16:49:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:30,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:30,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:30,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2024-01-31 16:49:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:30,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046603273] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:30,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:30,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-01-31 16:49:30,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555994459] [2024-01-31 16:49:30,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:30,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:49:30,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:49:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:49:30,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:30,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 368 transitions, 6404 flow. Second operand has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 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 16:49:30,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:30,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:30,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:31,155 INFO L124 PetriNetUnfolderBase]: 2011/4404 cut-off events. [2024-01-31 16:49:31,155 INFO L125 PetriNetUnfolderBase]: For 54006/54006 co-relation queries the response was YES. [2024-01-31 16:49:31,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22025 conditions, 4404 events. 2011/4404 cut-off events. For 54006/54006 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 36833 event pairs, 693 based on Foata normal form. 4/4396 useless extension candidates. Maximal degree in co-relation 21946. Up to 1716 conditions per place. [2024-01-31 16:49:31,187 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 235 selfloop transitions, 139 changer transitions 14/391 dead transitions. [2024-01-31 16:49:31,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 391 transitions, 7177 flow [2024-01-31 16:49:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:49:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:49:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-01-31 16:49:31,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006734006734007 [2024-01-31 16:49:31,189 INFO L175 Difference]: Start difference. First operand has 303 places, 368 transitions, 6404 flow. Second operand 11 states and 119 transitions. [2024-01-31 16:49:31,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 391 transitions, 7177 flow [2024-01-31 16:49:31,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 391 transitions, 7045 flow, removed 14 selfloop flow, removed 17 redundant places. [2024-01-31 16:49:31,423 INFO L231 Difference]: Finished difference. Result has 296 places, 360 transitions, 6450 flow [2024-01-31 16:49:31,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6450, PETRI_PLACES=296, PETRI_TRANSITIONS=360} [2024-01-31 16:49:31,424 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 270 predicate places. [2024-01-31 16:49:31,424 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 360 transitions, 6450 flow [2024-01-31 16:49:31,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 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 16:49:31,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:31,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:31,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:31,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:31,628 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:31,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash -785557778, now seen corresponding path program 16 times [2024-01-31 16:49:31,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:31,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508838646] [2024-01-31 16:49:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:31,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:31,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508838646] [2024-01-31 16:49:31,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508838646] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:31,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516692601] [2024-01-31 16:49:31,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:49:31,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:31,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:31,888 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:31,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 16:49:32,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:49:32,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:32,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:49:32,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:32,170 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 91 treesize of output 59 [2024-01-31 16:49:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:32,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:32,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:32,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-01-31 16:49:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:32,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516692601] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:32,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:32,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2024-01-31 16:49:32,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174876841] [2024-01-31 16:49:32,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:49:32,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:49:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:49:32,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:32,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 360 transitions, 6450 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 16:49:32,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:32,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:32,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:34,090 INFO L124 PetriNetUnfolderBase]: 2084/4615 cut-off events. [2024-01-31 16:49:34,091 INFO L125 PetriNetUnfolderBase]: For 59825/59833 co-relation queries the response was YES. [2024-01-31 16:49:34,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23300 conditions, 4615 events. 2084/4615 cut-off events. For 59825/59833 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39160 event pairs, 496 based on Foata normal form. 24/4627 useless extension candidates. Maximal degree in co-relation 23224. Up to 1335 conditions per place. [2024-01-31 16:49:34,116 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 235 selfloop transitions, 238 changer transitions 18/494 dead transitions. [2024-01-31 16:49:34,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 494 transitions, 8102 flow [2024-01-31 16:49:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 16:49:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 16:49:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 351 transitions. [2024-01-31 16:49:34,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-01-31 16:49:34,118 INFO L175 Difference]: Start difference. First operand has 296 places, 360 transitions, 6450 flow. Second operand 32 states and 351 transitions. [2024-01-31 16:49:34,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 494 transitions, 8102 flow [2024-01-31 16:49:34,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 494 transitions, 7860 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-01-31 16:49:34,339 INFO L231 Difference]: Finished difference. Result has 320 places, 379 transitions, 7212 flow [2024-01-31 16:49:34,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7212, PETRI_PLACES=320, PETRI_TRANSITIONS=379} [2024-01-31 16:49:34,340 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 294 predicate places. [2024-01-31 16:49:34,340 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 379 transitions, 7212 flow [2024-01-31 16:49:34,341 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 16:49:34,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:34,341 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:34,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:34,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 16:49:34,552 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:34,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash 60781582, now seen corresponding path program 17 times [2024-01-31 16:49:34,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:34,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335709405] [2024-01-31 16:49:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:34,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335709405] [2024-01-31 16:49:34,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335709405] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345669267] [2024-01-31 16:49:34,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:49:34,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:34,810 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:34,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 16:49:34,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:49:34,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:34,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:49:34,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:35,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:35,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:35,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-01-31 16:49:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345669267] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:35,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:35,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-01-31 16:49:35,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623571509] [2024-01-31 16:49:35,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:35,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:49:35,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:49:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:49:35,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:35,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 379 transitions, 7212 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 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 16:49:35,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:35,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:35,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:36,173 INFO L124 PetriNetUnfolderBase]: 2053/4530 cut-off events. [2024-01-31 16:49:36,174 INFO L125 PetriNetUnfolderBase]: For 66098/66106 co-relation queries the response was YES. [2024-01-31 16:49:36,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23868 conditions, 4530 events. 2053/4530 cut-off events. For 66098/66106 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 38418 event pairs, 1196 based on Foata normal form. 22/4546 useless extension candidates. Maximal degree in co-relation 23787. Up to 3549 conditions per place. [2024-01-31 16:49:36,203 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 335 selfloop transitions, 47 changer transitions 6/391 dead transitions. [2024-01-31 16:49:36,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 391 transitions, 7866 flow [2024-01-31 16:49:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:49:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:49:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-01-31 16:49:36,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2024-01-31 16:49:36,204 INFO L175 Difference]: Start difference. First operand has 320 places, 379 transitions, 7212 flow. Second operand 9 states and 96 transitions. [2024-01-31 16:49:36,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 391 transitions, 7866 flow [2024-01-31 16:49:36,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 391 transitions, 7367 flow, removed 45 selfloop flow, removed 17 redundant places. [2024-01-31 16:49:36,466 INFO L231 Difference]: Finished difference. Result has 310 places, 371 transitions, 6625 flow [2024-01-31 16:49:36,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6625, PETRI_PLACES=310, PETRI_TRANSITIONS=371} [2024-01-31 16:49:36,467 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 284 predicate places. [2024-01-31 16:49:36,467 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 371 transitions, 6625 flow [2024-01-31 16:49:36,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 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 16:49:36,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:36,467 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:36,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:36,668 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:36,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -968362116, now seen corresponding path program 18 times [2024-01-31 16:49:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446131279] [2024-01-31 16:49:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:36,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446131279] [2024-01-31 16:49:36,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446131279] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476635074] [2024-01-31 16:49:36,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:49:36,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:36,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:36,993 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:37,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 16:49:37,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:49:37,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:37,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:49:37,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:37,317 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 112 treesize of output 72 [2024-01-31 16:49:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:37,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:37,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:37,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2024-01-31 16:49:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:37,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476635074] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:37,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:37,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-01-31 16:49:37,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369157816] [2024-01-31 16:49:37,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:37,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:49:37,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:49:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:49:37,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:37,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 371 transitions, 6625 flow. Second operand has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 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 16:49:37,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:37,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:37,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:38,767 INFO L124 PetriNetUnfolderBase]: 2058/4518 cut-off events. [2024-01-31 16:49:38,767 INFO L125 PetriNetUnfolderBase]: For 60426/60426 co-relation queries the response was YES. [2024-01-31 16:49:38,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22966 conditions, 4518 events. 2058/4518 cut-off events. For 60426/60426 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38088 event pairs, 494 based on Foata normal form. 16/4526 useless extension candidates. Maximal degree in co-relation 22887. Up to 1475 conditions per place. [2024-01-31 16:49:38,797 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 199 selfloop transitions, 226 changer transitions 12/440 dead transitions. [2024-01-31 16:49:38,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 440 transitions, 7812 flow [2024-01-31 16:49:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:49:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:49:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 229 transitions. [2024-01-31 16:49:38,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38552188552188554 [2024-01-31 16:49:38,798 INFO L175 Difference]: Start difference. First operand has 310 places, 371 transitions, 6625 flow. Second operand 22 states and 229 transitions. [2024-01-31 16:49:38,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 440 transitions, 7812 flow [2024-01-31 16:49:39,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 440 transitions, 7717 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-01-31 16:49:39,045 INFO L231 Difference]: Finished difference. Result has 319 places, 370 transitions, 7031 flow [2024-01-31 16:49:39,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6412, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7031, PETRI_PLACES=319, PETRI_TRANSITIONS=370} [2024-01-31 16:49:39,045 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 293 predicate places. [2024-01-31 16:49:39,045 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 370 transitions, 7031 flow [2024-01-31 16:49:39,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 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 16:49:39,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:39,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:39,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:39,256 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:39,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash -623427546, now seen corresponding path program 19 times [2024-01-31 16:49:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:39,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073006767] [2024-01-31 16:49:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:39,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:39,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073006767] [2024-01-31 16:49:39,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073006767] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:39,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065941747] [2024-01-31 16:49:39,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:49:39,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:39,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:39,491 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:39,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 16:49:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:39,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:49:39,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:39,723 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 112 treesize of output 72 [2024-01-31 16:49:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:39,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:39,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:39,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-01-31 16:49:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:40,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065941747] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:40,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:40,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2024-01-31 16:49:40,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080174541] [2024-01-31 16:49:40,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:40,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:49:40,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:49:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:49:40,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:40,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 370 transitions, 7031 flow. Second operand has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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 16:49:40,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:40,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:40,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:41,296 INFO L124 PetriNetUnfolderBase]: 2150/4703 cut-off events. [2024-01-31 16:49:41,296 INFO L125 PetriNetUnfolderBase]: For 74483/74487 co-relation queries the response was YES. [2024-01-31 16:49:41,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24981 conditions, 4703 events. 2150/4703 cut-off events. For 74483/74487 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 39983 event pairs, 721 based on Foata normal form. 36/4725 useless extension candidates. Maximal degree in co-relation 24904. Up to 2030 conditions per place. [2024-01-31 16:49:41,327 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 304 selfloop transitions, 176 changer transitions 15/498 dead transitions. [2024-01-31 16:49:41,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 498 transitions, 9042 flow [2024-01-31 16:49:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:49:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:49:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 278 transitions. [2024-01-31 16:49:41,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2024-01-31 16:49:41,328 INFO L175 Difference]: Start difference. First operand has 319 places, 370 transitions, 7031 flow. Second operand 22 states and 278 transitions. [2024-01-31 16:49:41,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 498 transitions, 9042 flow [2024-01-31 16:49:41,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 498 transitions, 8735 flow, removed 21 selfloop flow, removed 13 redundant places. [2024-01-31 16:49:41,621 INFO L231 Difference]: Finished difference. Result has 335 places, 392 transitions, 7819 flow [2024-01-31 16:49:41,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6676, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7819, PETRI_PLACES=335, PETRI_TRANSITIONS=392} [2024-01-31 16:49:41,621 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 309 predicate places. [2024-01-31 16:49:41,622 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 392 transitions, 7819 flow [2024-01-31 16:49:41,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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 16:49:41,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:41,622 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:41,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:41,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:41,822 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:41,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:41,823 INFO L85 PathProgramCache]: Analyzing trace with hash 41830708, now seen corresponding path program 20 times [2024-01-31 16:49:41,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:41,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989105886] [2024-01-31 16:49:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:42,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:42,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989105886] [2024-01-31 16:49:42,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989105886] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:42,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733215738] [2024-01-31 16:49:42,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:49:42,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:42,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:42,050 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:42,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 16:49:42,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:49:42,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:42,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:49:42,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:42,368 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 61 treesize of output 37 [2024-01-31 16:49:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:42,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:42,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:42,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2024-01-31 16:49:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:42,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733215738] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:42,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:42,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-01-31 16:49:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630631897] [2024-01-31 16:49:42,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:42,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:49:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:42,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:49:42,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:49:42,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:42,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 392 transitions, 7819 flow. Second operand has 18 states, 18 states have (on average 7.166666666666667) internal successors, (129), 18 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 16:49:42,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:42,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:42,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:43,458 INFO L124 PetriNetUnfolderBase]: 2139/4615 cut-off events. [2024-01-31 16:49:43,458 INFO L125 PetriNetUnfolderBase]: For 76517/76517 co-relation queries the response was YES. [2024-01-31 16:49:43,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25407 conditions, 4615 events. 2139/4615 cut-off events. For 76517/76517 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38948 event pairs, 993 based on Foata normal form. 2/4581 useless extension candidates. Maximal degree in co-relation 25324. Up to 2596 conditions per place. [2024-01-31 16:49:43,492 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 282 selfloop transitions, 118 changer transitions 11/414 dead transitions. [2024-01-31 16:49:43,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 414 transitions, 8672 flow [2024-01-31 16:49:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:49:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:49:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-01-31 16:49:43,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872053872053872 [2024-01-31 16:49:43,497 INFO L175 Difference]: Start difference. First operand has 335 places, 392 transitions, 7819 flow. Second operand 11 states and 115 transitions. [2024-01-31 16:49:43,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 414 transitions, 8672 flow [2024-01-31 16:49:43,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 414 transitions, 8444 flow, removed 95 selfloop flow, removed 10 redundant places. [2024-01-31 16:49:43,788 INFO L231 Difference]: Finished difference. Result has 331 places, 384 transitions, 7709 flow [2024-01-31 16:49:43,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7508, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7709, PETRI_PLACES=331, PETRI_TRANSITIONS=384} [2024-01-31 16:49:43,788 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 305 predicate places. [2024-01-31 16:49:43,788 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 384 transitions, 7709 flow [2024-01-31 16:49:43,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.166666666666667) internal successors, (129), 18 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 16:49:43,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:43,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:43,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-01-31 16:49:43,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:43,989 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:43,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash 333150570, now seen corresponding path program 21 times [2024-01-31 16:49:43,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:43,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833929581] [2024-01-31 16:49:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:43,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833929581] [2024-01-31 16:49:44,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833929581] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053295893] [2024-01-31 16:49:44,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:49:44,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:44,238 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:44,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 16:49:44,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:49:44,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:44,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-31 16:49:44,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:44,397 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 16:49:44,410 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 19 treesize of output 1 [2024-01-31 16:49:44,423 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 19 treesize of output 1 [2024-01-31 16:49:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:49:44,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053295893] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:44,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:44,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 23 [2024-01-31 16:49:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294990697] [2024-01-31 16:49:44,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:49:44,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:49:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:49:44,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:44,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 384 transitions, 7709 flow. Second operand has 23 states, 23 states have (on average 7.260869565217392) internal successors, (167), 23 states have internal predecessors, (167), 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 16:49:44,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:44,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:44,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:45,968 INFO L124 PetriNetUnfolderBase]: 2124/4612 cut-off events. [2024-01-31 16:49:45,969 INFO L125 PetriNetUnfolderBase]: For 74106/74106 co-relation queries the response was YES. [2024-01-31 16:49:45,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24823 conditions, 4612 events. 2124/4612 cut-off events. For 74106/74106 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 38800 event pairs, 795 based on Foata normal form. 24/4628 useless extension candidates. Maximal degree in co-relation 24743. Up to 2632 conditions per place. [2024-01-31 16:49:46,001 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 280 selfloop transitions, 148 changer transitions 14/445 dead transitions. [2024-01-31 16:49:46,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 445 transitions, 8752 flow [2024-01-31 16:49:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:49:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:49:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 205 transitions. [2024-01-31 16:49:46,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218106995884774 [2024-01-31 16:49:46,002 INFO L175 Difference]: Start difference. First operand has 331 places, 384 transitions, 7709 flow. Second operand 18 states and 205 transitions. [2024-01-31 16:49:46,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 445 transitions, 8752 flow [2024-01-31 16:49:46,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 445 transitions, 8463 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-01-31 16:49:46,259 INFO L231 Difference]: Finished difference. Result has 338 places, 383 transitions, 7699 flow [2024-01-31 16:49:46,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7699, PETRI_PLACES=338, PETRI_TRANSITIONS=383} [2024-01-31 16:49:46,259 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 312 predicate places. [2024-01-31 16:49:46,260 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 383 transitions, 7699 flow [2024-01-31 16:49:46,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.260869565217392) internal successors, (167), 23 states have internal predecessors, (167), 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 16:49:46,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:46,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:46,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-01-31 16:49:46,460 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:46,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1916108070, now seen corresponding path program 22 times [2024-01-31 16:49:46,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:46,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375048879] [2024-01-31 16:49:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:46,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:46,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:46,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375048879] [2024-01-31 16:49:46,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375048879] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:46,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474626914] [2024-01-31 16:49:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:49:46,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:46,688 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:46,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 16:49:46,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:49:46,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:46,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:49:46,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:46,972 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 112 treesize of output 72 [2024-01-31 16:49:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:47,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:47,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:47,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-01-31 16:49:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474626914] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:47,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:47,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-31 16:49:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332408950] [2024-01-31 16:49:47,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:47,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:49:47,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:47,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:49:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:49:47,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:47,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 383 transitions, 7699 flow. Second operand has 19 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 19 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:47,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:47,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:47,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:48,481 INFO L124 PetriNetUnfolderBase]: 2084/4474 cut-off events. [2024-01-31 16:49:48,481 INFO L125 PetriNetUnfolderBase]: For 74211/74211 co-relation queries the response was YES. [2024-01-31 16:49:48,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24328 conditions, 4474 events. 2084/4474 cut-off events. For 74211/74211 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 37269 event pairs, 564 based on Foata normal form. 10/4470 useless extension candidates. Maximal degree in co-relation 24246. Up to 1225 conditions per place. [2024-01-31 16:49:48,513 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 227 selfloop transitions, 189 changer transitions 28/447 dead transitions. [2024-01-31 16:49:48,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 447 transitions, 8726 flow [2024-01-31 16:49:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:49:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:49:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 234 transitions. [2024-01-31 16:49:48,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37681159420289856 [2024-01-31 16:49:48,515 INFO L175 Difference]: Start difference. First operand has 338 places, 383 transitions, 7699 flow. Second operand 23 states and 234 transitions. [2024-01-31 16:49:48,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 447 transitions, 8726 flow [2024-01-31 16:49:48,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 447 transitions, 8527 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-01-31 16:49:48,781 INFO L231 Difference]: Finished difference. Result has 346 places, 373 transitions, 7645 flow [2024-01-31 16:49:48,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7331, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7645, PETRI_PLACES=346, PETRI_TRANSITIONS=373} [2024-01-31 16:49:48,781 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 320 predicate places. [2024-01-31 16:49:48,782 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 373 transitions, 7645 flow [2024-01-31 16:49:48,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 19 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:48,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:48,782 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:48,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:48,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-31 16:49:48,992 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:48,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:48,993 INFO L85 PathProgramCache]: Analyzing trace with hash 271769340, now seen corresponding path program 23 times [2024-01-31 16:49:48,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:48,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394495422] [2024-01-31 16:49:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:48,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:49,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394495422] [2024-01-31 16:49:49,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394495422] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:49,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559145389] [2024-01-31 16:49:49,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:49:49,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:49,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:49,418 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:49,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 16:49:49,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:49:49,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:49,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 16:49:49,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:49,721 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 82 treesize of output 50 [2024-01-31 16:49:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:49,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:49,845 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 16:49:49,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 56 [2024-01-31 16:49:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:49,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559145389] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:49,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:49,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 21 [2024-01-31 16:49:49,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462662] [2024-01-31 16:49:49,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:49,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:49:49,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:49,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:49:49,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:49:49,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:49,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 373 transitions, 7645 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:49,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:49,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:49,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:50,869 INFO L124 PetriNetUnfolderBase]: 2060/4426 cut-off events. [2024-01-31 16:49:50,869 INFO L125 PetriNetUnfolderBase]: For 74917/74917 co-relation queries the response was YES. [2024-01-31 16:49:50,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24473 conditions, 4426 events. 2060/4426 cut-off events. For 74917/74917 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36803 event pairs, 891 based on Foata normal form. 2/4420 useless extension candidates. Maximal degree in co-relation 24392. Up to 2012 conditions per place. [2024-01-31 16:49:50,901 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 270 selfloop transitions, 120 changer transitions 8/401 dead transitions. [2024-01-31 16:49:50,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 401 transitions, 8711 flow [2024-01-31 16:49:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:49:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:49:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 115 transitions. [2024-01-31 16:49:50,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3549382716049383 [2024-01-31 16:49:50,903 INFO L175 Difference]: Start difference. First operand has 346 places, 373 transitions, 7645 flow. Second operand 12 states and 115 transitions. [2024-01-31 16:49:50,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 401 transitions, 8711 flow [2024-01-31 16:49:51,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 401 transitions, 8425 flow, removed 12 selfloop flow, removed 21 redundant places. [2024-01-31 16:49:51,175 INFO L231 Difference]: Finished difference. Result has 331 places, 370 transitions, 7550 flow [2024-01-31 16:49:51,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7354, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7550, PETRI_PLACES=331, PETRI_TRANSITIONS=370} [2024-01-31 16:49:51,175 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 305 predicate places. [2024-01-31 16:49:51,176 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 370 transitions, 7550 flow [2024-01-31 16:49:51,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:51,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:51,176 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:51,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:51,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-01-31 16:49:51,377 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:51,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash 219313664, now seen corresponding path program 24 times [2024-01-31 16:49:51,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:51,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250618221] [2024-01-31 16:49:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:51,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:51,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:51,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250618221] [2024-01-31 16:49:51,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250618221] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:51,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936951407] [2024-01-31 16:49:51,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:49:51,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:51,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:51,668 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:51,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 16:49:51,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:49:51,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:51,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 16:49:51,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:51,812 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 16:49:51,822 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 19 treesize of output 1 [2024-01-31 16:49:51,834 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 19 treesize of output 1 [2024-01-31 16:49:51,992 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 61 treesize of output 37 [2024-01-31 16:49:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:52,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936951407] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:52,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 7] total 21 [2024-01-31 16:49:52,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9027281] [2024-01-31 16:49:52,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:52,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:49:52,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:52,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:49:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:49:52,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:52,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 370 transitions, 7550 flow. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 21 states have internal predecessors, (149), 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 16:49:52,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:52,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:52,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:53,257 INFO L124 PetriNetUnfolderBase]: 2046/4366 cut-off events. [2024-01-31 16:49:53,257 INFO L125 PetriNetUnfolderBase]: For 73740/73740 co-relation queries the response was YES. [2024-01-31 16:49:53,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24122 conditions, 4366 events. 2046/4366 cut-off events. For 73740/73740 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36030 event pairs, 420 based on Foata normal form. 2/4340 useless extension candidates. Maximal degree in co-relation 24048. Up to 755 conditions per place. [2024-01-31 16:49:53,288 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 188 selfloop transitions, 215 changer transitions 8/414 dead transitions. [2024-01-31 16:49:53,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 414 transitions, 8683 flow [2024-01-31 16:49:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:49:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:49:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 163 transitions. [2024-01-31 16:49:53,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.355119825708061 [2024-01-31 16:49:53,289 INFO L175 Difference]: Start difference. First operand has 331 places, 370 transitions, 7550 flow. Second operand 17 states and 163 transitions. [2024-01-31 16:49:53,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 414 transitions, 8683 flow [2024-01-31 16:49:53,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 414 transitions, 8441 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-01-31 16:49:53,532 INFO L231 Difference]: Finished difference. Result has 335 places, 371 transitions, 7789 flow [2024-01-31 16:49:53,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7296, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7789, PETRI_PLACES=335, PETRI_TRANSITIONS=371} [2024-01-31 16:49:53,533 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 309 predicate places. [2024-01-31 16:49:53,533 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 371 transitions, 7789 flow [2024-01-31 16:49:53,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 21 states have internal predecessors, (149), 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 16:49:53,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:53,534 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:53,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:53,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:53,744 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:53,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1413862612, now seen corresponding path program 25 times [2024-01-31 16:49:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:53,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946442416] [2024-01-31 16:49:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:53,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946442416] [2024-01-31 16:49:53,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946442416] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:53,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471742427] [2024-01-31 16:49:53,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:49:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:53,988 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:53,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 16:49:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:54,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 16:49:54,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:54,204 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 91 treesize of output 59 [2024-01-31 16:49:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:54,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:54,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:54,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-01-31 16:49:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:54,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471742427] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:54,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:54,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-01-31 16:49:54,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229126579] [2024-01-31 16:49:54,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:54,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:49:54,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:49:54,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:49:54,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:54,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 371 transitions, 7789 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 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 16:49:54,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:54,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:54,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:55,379 INFO L124 PetriNetUnfolderBase]: 2132/4555 cut-off events. [2024-01-31 16:49:55,379 INFO L125 PetriNetUnfolderBase]: For 82213/82213 co-relation queries the response was YES. [2024-01-31 16:49:55,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25596 conditions, 4555 events. 2132/4555 cut-off events. For 82213/82213 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 37889 event pairs, 1191 based on Foata normal form. 12/4559 useless extension candidates. Maximal degree in co-relation 25522. Up to 3272 conditions per place. [2024-01-31 16:49:55,412 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 349 selfloop transitions, 67 changer transitions 9/428 dead transitions. [2024-01-31 16:49:55,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 428 transitions, 9189 flow [2024-01-31 16:49:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:49:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:49:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-01-31 16:49:55,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-31 16:49:55,413 INFO L175 Difference]: Start difference. First operand has 335 places, 371 transitions, 7789 flow. Second operand 12 states and 135 transitions. [2024-01-31 16:49:55,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 428 transitions, 9189 flow [2024-01-31 16:49:55,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 428 transitions, 9122 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-01-31 16:49:55,674 INFO L231 Difference]: Finished difference. Result has 337 places, 384 transitions, 8183 flow [2024-01-31 16:49:55,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8183, PETRI_PLACES=337, PETRI_TRANSITIONS=384} [2024-01-31 16:49:55,674 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 311 predicate places. [2024-01-31 16:49:55,674 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 384 transitions, 8183 flow [2024-01-31 16:49:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 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 16:49:55,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:55,675 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:55,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:55,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-31 16:49:55,880 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:55,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1970944628, now seen corresponding path program 26 times [2024-01-31 16:49:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:55,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263603483] [2024-01-31 16:49:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:55,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:56,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:56,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263603483] [2024-01-31 16:49:56,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263603483] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:56,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756509838] [2024-01-31 16:49:56,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:49:56,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:56,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:56,133 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:56,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 16:49:56,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:49:56,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:56,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:49:56,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:56,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:56,576 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 16:49:56,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-01-31 16:49:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:56,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756509838] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:56,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:56,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-01-31 16:49:56,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317290839] [2024-01-31 16:49:56,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:56,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:49:56,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:49:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:49:56,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:56,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 384 transitions, 8183 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 16:49:56,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:56,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:56,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:57,875 INFO L124 PetriNetUnfolderBase]: 2172/4682 cut-off events. [2024-01-31 16:49:57,875 INFO L125 PetriNetUnfolderBase]: For 84083/84083 co-relation queries the response was YES. [2024-01-31 16:49:57,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26307 conditions, 4682 events. 2172/4682 cut-off events. For 84083/84083 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39333 event pairs, 212 based on Foata normal form. 16/4690 useless extension candidates. Maximal degree in co-relation 26232. Up to 698 conditions per place. [2024-01-31 16:49:57,906 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 204 selfloop transitions, 246 changer transitions 10/463 dead transitions. [2024-01-31 16:49:57,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 463 transitions, 9734 flow [2024-01-31 16:49:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:49:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:49:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 221 transitions. [2024-01-31 16:49:57,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3720538720538721 [2024-01-31 16:49:57,908 INFO L175 Difference]: Start difference. First operand has 337 places, 384 transitions, 8183 flow. Second operand 22 states and 221 transitions. [2024-01-31 16:49:57,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 463 transitions, 9734 flow [2024-01-31 16:49:58,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 463 transitions, 9658 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-01-31 16:49:58,169 INFO L231 Difference]: Finished difference. Result has 354 places, 396 transitions, 8879 flow [2024-01-31 16:49:58,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8107, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8879, PETRI_PLACES=354, PETRI_TRANSITIONS=396} [2024-01-31 16:49:58,170 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 328 predicate places. [2024-01-31 16:49:58,171 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 396 transitions, 8879 flow [2024-01-31 16:49:58,171 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 16:49:58,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:58,171 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:58,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 16:49:58,371 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:58,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1471965684, now seen corresponding path program 27 times [2024-01-31 16:49:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767958400] [2024-01-31 16:49:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:58,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:58,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767958400] [2024-01-31 16:49:58,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767958400] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:58,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287903748] [2024-01-31 16:49:58,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:49:58,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:58,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:58,610 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:58,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 16:49:58,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 16:49:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:58,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:49:58,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:58,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:59,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:59,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-01-31 16:49:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287903748] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:59,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:59,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-01-31 16:49:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91881160] [2024-01-31 16:49:59,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:59,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:49:59,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:49:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:49:59,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:49:59,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 396 transitions, 8879 flow. Second operand has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 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 16:49:59,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:59,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:49:59,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:00,134 INFO L124 PetriNetUnfolderBase]: 2141/4557 cut-off events. [2024-01-31 16:50:00,134 INFO L125 PetriNetUnfolderBase]: For 90645/90645 co-relation queries the response was YES. [2024-01-31 16:50:00,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26517 conditions, 4557 events. 2141/4557 cut-off events. For 90645/90645 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 37683 event pairs, 763 based on Foata normal form. 16/4565 useless extension candidates. Maximal degree in co-relation 26440. Up to 1944 conditions per place. [2024-01-31 16:50:00,166 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 270 selfloop transitions, 146 changer transitions 9/428 dead transitions. [2024-01-31 16:50:00,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 428 transitions, 9647 flow [2024-01-31 16:50:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:50:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:50:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 139 transitions. [2024-01-31 16:50:00,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396011396011396 [2024-01-31 16:50:00,167 INFO L175 Difference]: Start difference. First operand has 354 places, 396 transitions, 8879 flow. Second operand 13 states and 139 transitions. [2024-01-31 16:50:00,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 428 transitions, 9647 flow [2024-01-31 16:50:00,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 428 transitions, 9111 flow, removed 19 selfloop flow, removed 17 redundant places. [2024-01-31 16:50:00,422 INFO L231 Difference]: Finished difference. Result has 347 places, 390 transitions, 8407 flow [2024-01-31 16:50:00,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8061, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8407, PETRI_PLACES=347, PETRI_TRANSITIONS=390} [2024-01-31 16:50:00,422 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 321 predicate places. [2024-01-31 16:50:00,422 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 390 transitions, 8407 flow [2024-01-31 16:50:00,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 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 16:50:00,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:00,423 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:00,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:00,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 16:50:00,634 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:00,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash 276271718, now seen corresponding path program 28 times [2024-01-31 16:50:00,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:00,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677041975] [2024-01-31 16:50:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:00,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:00,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677041975] [2024-01-31 16:50:00,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677041975] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:00,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930296280] [2024-01-31 16:50:00,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:50:00,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:00,866 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:00,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 16:50:01,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:50:01,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:01,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:50:01,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:01,145 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 112 treesize of output 72 [2024-01-31 16:50:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:01,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:01,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:01,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2024-01-31 16:50:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:01,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930296280] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:01,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:01,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2024-01-31 16:50:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168249200] [2024-01-31 16:50:01,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:01,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:50:01,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:50:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:50:01,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:01,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 390 transitions, 8407 flow. Second operand has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 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 16:50:01,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:01,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:01,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:03,410 INFO L124 PetriNetUnfolderBase]: 2255/4823 cut-off events. [2024-01-31 16:50:03,410 INFO L125 PetriNetUnfolderBase]: For 88429/88429 co-relation queries the response was YES. [2024-01-31 16:50:03,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27402 conditions, 4823 events. 2255/4823 cut-off events. For 88429/88429 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40523 event pairs, 380 based on Foata normal form. 16/4831 useless extension candidates. Maximal degree in co-relation 27326. Up to 1162 conditions per place. [2024-01-31 16:50:03,446 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 255 selfloop transitions, 266 changer transitions 18/542 dead transitions. [2024-01-31 16:50:03,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 542 transitions, 10495 flow [2024-01-31 16:50:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 16:50:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 16:50:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 380 transitions. [2024-01-31 16:50:03,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139433551198257 [2024-01-31 16:50:03,447 INFO L175 Difference]: Start difference. First operand has 347 places, 390 transitions, 8407 flow. Second operand 34 states and 380 transitions. [2024-01-31 16:50:03,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 542 transitions, 10495 flow [2024-01-31 16:50:03,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 542 transitions, 10265 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-01-31 16:50:03,739 INFO L231 Difference]: Finished difference. Result has 378 places, 415 transitions, 9421 flow [2024-01-31 16:50:03,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9421, PETRI_PLACES=378, PETRI_TRANSITIONS=415} [2024-01-31 16:50:03,741 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 352 predicate places. [2024-01-31 16:50:03,741 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 415 transitions, 9421 flow [2024-01-31 16:50:03,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 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 16:50:03,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:03,741 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:03,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:03,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:03,952 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:03,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 313880780, now seen corresponding path program 29 times [2024-01-31 16:50:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210067749] [2024-01-31 16:50:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:03,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:04,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210067749] [2024-01-31 16:50:04,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210067749] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954416674] [2024-01-31 16:50:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:50:04,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:04,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:04,188 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:04,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-31 16:50:04,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:50:04,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:04,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:50:04,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:04,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:04,523 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 16:50:04,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-01-31 16:50:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:04,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954416674] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:04,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:04,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-01-31 16:50:04,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277699203] [2024-01-31 16:50:04,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:04,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:50:04,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:50:04,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:50:04,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:04,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 415 transitions, 9421 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 16:50:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:04,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:04,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:05,663 INFO L124 PetriNetUnfolderBase]: 2275/4823 cut-off events. [2024-01-31 16:50:05,664 INFO L125 PetriNetUnfolderBase]: For 96494/96494 co-relation queries the response was YES. [2024-01-31 16:50:05,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28114 conditions, 4823 events. 2275/4823 cut-off events. For 96494/96494 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 40539 event pairs, 476 based on Foata normal form. 20/4835 useless extension candidates. Maximal degree in co-relation 28031. Up to 2038 conditions per place. [2024-01-31 16:50:05,697 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 299 selfloop transitions, 140 changer transitions 3/445 dead transitions. [2024-01-31 16:50:05,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 445 transitions, 10387 flow [2024-01-31 16:50:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:50:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:50:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-01-31 16:50:05,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-01-31 16:50:05,699 INFO L175 Difference]: Start difference. First operand has 378 places, 415 transitions, 9421 flow. Second operand 9 states and 105 transitions. [2024-01-31 16:50:05,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 445 transitions, 10387 flow [2024-01-31 16:50:06,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 445 transitions, 9938 flow, removed 47 selfloop flow, removed 23 redundant places. [2024-01-31 16:50:06,036 INFO L231 Difference]: Finished difference. Result has 360 places, 410 transitions, 9100 flow [2024-01-31 16:50:06,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8572, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9100, PETRI_PLACES=360, PETRI_TRANSITIONS=410} [2024-01-31 16:50:06,036 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 334 predicate places. [2024-01-31 16:50:06,037 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 410 transitions, 9100 flow [2024-01-31 16:50:06,037 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 16:50:06,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:06,037 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:06,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:06,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-01-31 16:50:06,248 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:06,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -713757323, now seen corresponding path program 30 times [2024-01-31 16:50:06,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:06,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516455074] [2024-01-31 16:50:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:06,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 16:50:06,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516455074] [2024-01-31 16:50:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516455074] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657626890] [2024-01-31 16:50:06,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:50:06,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:06,506 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:06,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-31 16:50:06,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:50:06,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:06,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:50:06,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:06,782 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 91 treesize of output 59 [2024-01-31 16:50:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 16:50:06,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:06,902 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 16:50:06,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-01-31 16:50:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 16:50:06,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657626890] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:06,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:06,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-01-31 16:50:06,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759831883] [2024-01-31 16:50:06,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:06,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:50:06,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:06,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:50:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:50:06,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:06,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 410 transitions, 9100 flow. Second operand has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 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 16:50:06,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:06,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:06,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:08,117 INFO L124 PetriNetUnfolderBase]: 2265/4756 cut-off events. [2024-01-31 16:50:08,117 INFO L125 PetriNetUnfolderBase]: For 90883/90883 co-relation queries the response was YES. [2024-01-31 16:50:08,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27767 conditions, 4756 events. 2265/4756 cut-off events. For 90883/90883 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 39589 event pairs, 483 based on Foata normal form. 2/4758 useless extension candidates. Maximal degree in co-relation 27690. Up to 1855 conditions per place. [2024-01-31 16:50:08,146 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 283 selfloop transitions, 162 changer transitions 12/460 dead transitions. [2024-01-31 16:50:08,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 460 transitions, 10248 flow [2024-01-31 16:50:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:50:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:50:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-01-31 16:50:08,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-31 16:50:08,147 INFO L175 Difference]: Start difference. First operand has 360 places, 410 transitions, 9100 flow. Second operand 14 states and 162 transitions. [2024-01-31 16:50:08,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 460 transitions, 10248 flow [2024-01-31 16:50:08,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 460 transitions, 9989 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-01-31 16:50:08,399 INFO L231 Difference]: Finished difference. Result has 363 places, 404 transitions, 9048 flow [2024-01-31 16:50:08,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9048, PETRI_PLACES=363, PETRI_TRANSITIONS=404} [2024-01-31 16:50:08,400 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 337 predicate places. [2024-01-31 16:50:08,400 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 404 transitions, 9048 flow [2024-01-31 16:50:08,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 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 16:50:08,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:08,400 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:08,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-01-31 16:50:08,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:08,604 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:08,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1209492157, now seen corresponding path program 31 times [2024-01-31 16:50:08,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:08,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041226481] [2024-01-31 16:50:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:08,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 16:50:08,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:08,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041226481] [2024-01-31 16:50:08,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041226481] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:08,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561715889] [2024-01-31 16:50:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:50:08,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:08,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:08,909 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:08,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-31 16:50:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:09,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 16:50:09,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:09,177 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 112 treesize of output 72 [2024-01-31 16:50:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 16:50:09,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:09,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:09,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2024-01-31 16:50:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 16:50:09,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561715889] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:09,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:09,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-01-31 16:50:09,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873929970] [2024-01-31 16:50:09,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:09,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:50:09,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:09,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:50:09,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:50:09,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:09,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 404 transitions, 9048 flow. Second operand has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 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 16:50:09,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:09,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:09,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:10,330 INFO L124 PetriNetUnfolderBase]: 2251/4682 cut-off events. [2024-01-31 16:50:10,330 INFO L125 PetriNetUnfolderBase]: For 89552/89555 co-relation queries the response was YES. [2024-01-31 16:50:10,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27468 conditions, 4682 events. 2251/4682 cut-off events. For 89552/89555 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 38767 event pairs, 1266 based on Foata normal form. 4/4662 useless extension candidates. Maximal degree in co-relation 27392. Up to 3699 conditions per place. [2024-01-31 16:50:10,366 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 365 selfloop transitions, 45 changer transitions 10/423 dead transitions. [2024-01-31 16:50:10,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 423 transitions, 9847 flow [2024-01-31 16:50:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:50:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:50:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-01-31 16:50:10,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 16:50:10,368 INFO L175 Difference]: Start difference. First operand has 363 places, 404 transitions, 9048 flow. Second operand 10 states and 108 transitions. [2024-01-31 16:50:10,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 423 transitions, 9847 flow [2024-01-31 16:50:10,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 423 transitions, 9505 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-01-31 16:50:10,644 INFO L231 Difference]: Finished difference. Result has 355 places, 398 transitions, 8668 flow [2024-01-31 16:50:10,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8598, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8668, PETRI_PLACES=355, PETRI_TRANSITIONS=398} [2024-01-31 16:50:10,645 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 329 predicate places. [2024-01-31 16:50:10,645 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 398 transitions, 8668 flow [2024-01-31 16:50:10,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 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 16:50:10,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:10,646 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:10,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:10,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-01-31 16:50:10,852 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:10,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash -202804209, now seen corresponding path program 32 times [2024-01-31 16:50:10,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:10,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411592978] [2024-01-31 16:50:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:10,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:11,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411592978] [2024-01-31 16:50:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411592978] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591502296] [2024-01-31 16:50:11,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:50:11,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:11,521 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:11,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-31 16:50:11,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:50:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:11,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-31 16:50:11,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:11,700 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 16:50:11,713 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 19 treesize of output 1 [2024-01-31 16:50:12,180 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 137 treesize of output 89 [2024-01-31 16:50:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:50:12,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:14,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591502296] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:14,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:14,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 10] total 30 [2024-01-31 16:50:14,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535645903] [2024-01-31 16:50:14,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:14,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:50:14,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:14,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:50:14,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:50:14,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:14,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 398 transitions, 8668 flow. Second operand has 30 states, 30 states have (on average 6.866666666666666) internal successors, (206), 30 states have internal predecessors, (206), 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 16:50:14,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:14,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:14,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:19,922 INFO L124 PetriNetUnfolderBase]: 3637/7691 cut-off events. [2024-01-31 16:50:19,922 INFO L125 PetriNetUnfolderBase]: For 152500/152503 co-relation queries the response was YES. [2024-01-31 16:50:19,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45220 conditions, 7691 events. 3637/7691 cut-off events. For 152500/152503 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 68443 event pairs, 578 based on Foata normal form. 6/7687 useless extension candidates. Maximal degree in co-relation 45145. Up to 1210 conditions per place. [2024-01-31 16:50:19,969 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 447 selfloop transitions, 338 changer transitions 22/810 dead transitions. [2024-01-31 16:50:19,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 810 transitions, 17070 flow [2024-01-31 16:50:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-31 16:50:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-31 16:50:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 466 transitions. [2024-01-31 16:50:19,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43148148148148147 [2024-01-31 16:50:19,971 INFO L175 Difference]: Start difference. First operand has 355 places, 398 transitions, 8668 flow. Second operand 40 states and 466 transitions. [2024-01-31 16:50:19,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 810 transitions, 17070 flow [2024-01-31 16:50:20,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 810 transitions, 16961 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-01-31 16:50:20,439 INFO L231 Difference]: Finished difference. Result has 398 places, 526 transitions, 12738 flow [2024-01-31 16:50:20,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8575, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=12738, PETRI_PLACES=398, PETRI_TRANSITIONS=526} [2024-01-31 16:50:20,440 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 372 predicate places. [2024-01-31 16:50:20,440 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 526 transitions, 12738 flow [2024-01-31 16:50:20,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.866666666666666) internal successors, (206), 30 states have internal predecessors, (206), 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 16:50:20,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:20,441 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:20,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-01-31 16:50:20,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:20,641 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:20,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1697793473, now seen corresponding path program 33 times [2024-01-31 16:50:20,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:20,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058556481] [2024-01-31 16:50:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:21,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:21,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058556481] [2024-01-31 16:50:21,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058556481] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:21,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073479665] [2024-01-31 16:50:21,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:50:21,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:21,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:21,223 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:21,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-31 16:50:21,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:50:21,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:21,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjunts are in the unsatisfiable core [2024-01-31 16:50:21,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:21,412 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 16:50:21,429 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 19 treesize of output 1 [2024-01-31 16:50:21,862 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 98 treesize of output 62 [2024-01-31 16:50:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:50:21,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:23,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073479665] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:23,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:23,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 30 [2024-01-31 16:50:23,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065667737] [2024-01-31 16:50:23,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:23,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:50:23,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:50:23,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:50:23,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:23,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 526 transitions, 12738 flow. Second operand has 30 states, 30 states have (on average 6.966666666666667) internal successors, (209), 30 states have internal predecessors, (209), 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 16:50:23,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:23,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:23,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:27,684 INFO L124 PetriNetUnfolderBase]: 3745/7929 cut-off events. [2024-01-31 16:50:27,684 INFO L125 PetriNetUnfolderBase]: For 176976/176979 co-relation queries the response was YES. [2024-01-31 16:50:27,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48841 conditions, 7929 events. 3745/7929 cut-off events. For 176976/176979 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 70897 event pairs, 851 based on Foata normal form. 6/7925 useless extension candidates. Maximal degree in co-relation 48753. Up to 1306 conditions per place. [2024-01-31 16:50:27,751 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 526 selfloop transitions, 296 changer transitions 24/849 dead transitions. [2024-01-31 16:50:27,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 849 transitions, 18610 flow [2024-01-31 16:50:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 16:50:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 16:50:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 472 transitions. [2024-01-31 16:50:27,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600389863547758 [2024-01-31 16:50:27,752 INFO L175 Difference]: Start difference. First operand has 398 places, 526 transitions, 12738 flow. Second operand 38 states and 472 transitions. [2024-01-31 16:50:27,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 849 transitions, 18610 flow [2024-01-31 16:50:28,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 849 transitions, 18295 flow, removed 140 selfloop flow, removed 8 redundant places. [2024-01-31 16:50:28,574 INFO L231 Difference]: Finished difference. Result has 438 places, 559 transitions, 13879 flow [2024-01-31 16:50:28,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12525, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13879, PETRI_PLACES=438, PETRI_TRANSITIONS=559} [2024-01-31 16:50:28,575 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 412 predicate places. [2024-01-31 16:50:28,575 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 559 transitions, 13879 flow [2024-01-31 16:50:28,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.966666666666667) internal successors, (209), 30 states have internal predecessors, (209), 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 16:50:28,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:28,575 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:28,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:28,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-31 16:50:28,776 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:28,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:28,777 INFO L85 PathProgramCache]: Analyzing trace with hash -103643545, now seen corresponding path program 34 times [2024-01-31 16:50:28,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:28,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368495090] [2024-01-31 16:50:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:28,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:29,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:29,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368495090] [2024-01-31 16:50:29,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368495090] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:29,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808800650] [2024-01-31 16:50:29,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:50:29,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:29,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:29,309 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:29,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-31 16:50:29,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:50:29,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:29,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 16:50:29,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:29,829 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 122 treesize of output 78 [2024-01-31 16:50:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:50:29,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:30,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:30,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 146 [2024-01-31 16:50:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:31,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808800650] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:31,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:31,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 27 [2024-01-31 16:50:31,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293692687] [2024-01-31 16:50:31,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:31,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:50:31,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:50:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:50:31,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:31,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 559 transitions, 13879 flow. Second operand has 27 states, 27 states have (on average 7.074074074074074) internal successors, (191), 27 states have internal predecessors, (191), 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 16:50:31,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:31,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:31,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:36,731 INFO L124 PetriNetUnfolderBase]: 5361/11496 cut-off events. [2024-01-31 16:50:36,731 INFO L125 PetriNetUnfolderBase]: For 272540/272543 co-relation queries the response was YES. [2024-01-31 16:50:36,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72460 conditions, 11496 events. 5361/11496 cut-off events. For 272540/272543 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 108324 event pairs, 947 based on Foata normal form. 62/11550 useless extension candidates. Maximal degree in co-relation 72362. Up to 3619 conditions per place. [2024-01-31 16:50:36,839 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 518 selfloop transitions, 386 changer transitions 97/1004 dead transitions. [2024-01-31 16:50:36,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1004 transitions, 24408 flow [2024-01-31 16:50:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:50:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:50:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 434 transitions. [2024-01-31 16:50:36,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344344344344344 [2024-01-31 16:50:36,840 INFO L175 Difference]: Start difference. First operand has 438 places, 559 transitions, 13879 flow. Second operand 37 states and 434 transitions. [2024-01-31 16:50:36,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1004 transitions, 24408 flow [2024-01-31 16:50:38,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1004 transitions, 23583 flow, removed 103 selfloop flow, removed 18 redundant places. [2024-01-31 16:50:38,209 INFO L231 Difference]: Finished difference. Result has 476 places, 706 transitions, 17935 flow [2024-01-31 16:50:38,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13263, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17935, PETRI_PLACES=476, PETRI_TRANSITIONS=706} [2024-01-31 16:50:38,210 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 450 predicate places. [2024-01-31 16:50:38,210 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 706 transitions, 17935 flow [2024-01-31 16:50:38,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.074074074074074) internal successors, (191), 27 states have internal predecessors, (191), 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 16:50:38,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:38,210 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:38,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-01-31 16:50:38,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-31 16:50:38,411 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:38,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 228754353, now seen corresponding path program 35 times [2024-01-31 16:50:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:38,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533761996] [2024-01-31 16:50:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:38,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:38,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:38,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533761996] [2024-01-31 16:50:38,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533761996] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:38,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887774137] [2024-01-31 16:50:38,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:50:38,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:38,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:38,945 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:38,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-31 16:50:39,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:50:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:39,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjunts are in the unsatisfiable core [2024-01-31 16:50:39,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:39,125 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 16:50:39,138 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 19 treesize of output 1 [2024-01-31 16:50:39,519 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 116 treesize of output 76 [2024-01-31 16:50:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:50:39,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:41,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887774137] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:41,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:41,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 30 [2024-01-31 16:50:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937829527] [2024-01-31 16:50:41,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:41,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:50:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:50:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:50:41,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:41,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 706 transitions, 17935 flow. Second operand has 30 states, 30 states have (on average 6.933333333333334) internal successors, (208), 30 states have internal predecessors, (208), 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 16:50:41,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:41,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:41,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:49,325 INFO L124 PetriNetUnfolderBase]: 5472/11540 cut-off events. [2024-01-31 16:50:49,325 INFO L125 PetriNetUnfolderBase]: For 303582/303585 co-relation queries the response was YES. [2024-01-31 16:50:49,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76058 conditions, 11540 events. 5472/11540 cut-off events. For 303582/303585 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 107735 event pairs, 1876 based on Foata normal form. 7/11533 useless extension candidates. Maximal degree in co-relation 75941. Up to 4295 conditions per place. [2024-01-31 16:50:49,453 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 637 selfloop transitions, 369 changer transitions 37/1046 dead transitions. [2024-01-31 16:50:49,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1046 transitions, 25340 flow [2024-01-31 16:50:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 16:50:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 16:50:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 483 transitions. [2024-01-31 16:50:49,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586894586894587 [2024-01-31 16:50:49,454 INFO L175 Difference]: Start difference. First operand has 476 places, 706 transitions, 17935 flow. Second operand 39 states and 483 transitions. [2024-01-31 16:50:49,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1046 transitions, 25340 flow [2024-01-31 16:50:51,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1046 transitions, 24450 flow, removed 346 selfloop flow, removed 15 redundant places. [2024-01-31 16:50:51,112 INFO L231 Difference]: Finished difference. Result has 508 places, 787 transitions, 20800 flow [2024-01-31 16:50:51,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=17286, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=20800, PETRI_PLACES=508, PETRI_TRANSITIONS=787} [2024-01-31 16:50:51,121 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 482 predicate places. [2024-01-31 16:50:51,121 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 787 transitions, 20800 flow [2024-01-31 16:50:51,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.933333333333334) internal successors, (208), 30 states have internal predecessors, (208), 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 16:50:51,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:51,121 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:51,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-01-31 16:50:51,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-31 16:50:51,322 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:51,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:51,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1952781895, now seen corresponding path program 36 times [2024-01-31 16:50:51,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:51,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246147604] [2024-01-31 16:50:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:51,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:51,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246147604] [2024-01-31 16:50:51,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246147604] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:51,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868959961] [2024-01-31 16:50:51,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:50:51,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:51,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:51,914 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:51,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-31 16:50:52,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:50:52,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:52,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-31 16:50:52,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:52,510 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 122 treesize of output 78 [2024-01-31 16:50:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:52,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:54,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:54,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 221 [2024-01-31 16:50:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:50:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868959961] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:54,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:54,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2024-01-31 16:50:54,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087931404] [2024-01-31 16:50:54,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:54,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:50:54,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:54,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:50:54,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:50:54,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:50:54,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 787 transitions, 20800 flow. Second operand has 27 states, 27 states have (on average 7.0) internal successors, (189), 27 states have internal predecessors, (189), 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 16:50:54,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:54,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:50:54,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:00,813 INFO L124 PetriNetUnfolderBase]: 5607/11975 cut-off events. [2024-01-31 16:51:00,813 INFO L125 PetriNetUnfolderBase]: For 321341/321341 co-relation queries the response was YES. [2024-01-31 16:51:00,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79529 conditions, 11975 events. 5607/11975 cut-off events. For 321341/321341 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 113637 event pairs, 1289 based on Foata normal form. 11/11978 useless extension candidates. Maximal degree in co-relation 79401. Up to 4933 conditions per place. [2024-01-31 16:51:00,937 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 614 selfloop transitions, 387 changer transitions 45/1049 dead transitions. [2024-01-31 16:51:00,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1049 transitions, 26831 flow [2024-01-31 16:51:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:51:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:51:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 437 transitions. [2024-01-31 16:51:00,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43743743743743746 [2024-01-31 16:51:00,938 INFO L175 Difference]: Start difference. First operand has 508 places, 787 transitions, 20800 flow. Second operand 37 states and 437 transitions. [2024-01-31 16:51:00,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1049 transitions, 26831 flow [2024-01-31 16:51:02,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1049 transitions, 26323 flow, removed 194 selfloop flow, removed 13 redundant places. [2024-01-31 16:51:02,785 INFO L231 Difference]: Finished difference. Result has 541 places, 821 transitions, 22263 flow [2024-01-31 16:51:02,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=20350, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22263, PETRI_PLACES=541, PETRI_TRANSITIONS=821} [2024-01-31 16:51:02,785 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 515 predicate places. [2024-01-31 16:51:02,786 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 821 transitions, 22263 flow [2024-01-31 16:51:02,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.0) internal successors, (189), 27 states have internal predecessors, (189), 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 16:51:02,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:02,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:02,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:02,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-31 16:51:02,986 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:02,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1103562835, now seen corresponding path program 37 times [2024-01-31 16:51:02,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:02,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65689042] [2024-01-31 16:51:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:02,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:51:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65689042] [2024-01-31 16:51:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65689042] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188479432] [2024-01-31 16:51:03,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:51:03,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:03,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:03,536 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:03,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-31 16:51:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:03,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:51:03,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:03,997 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 239 treesize of output 131 [2024-01-31 16:51:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:51:04,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:05,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:05,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 180 [2024-01-31 16:51:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:51:05,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188479432] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:05,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:05,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-01-31 16:51:05,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24821095] [2024-01-31 16:51:05,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:05,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:51:05,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:51:05,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:51:05,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:51:05,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 821 transitions, 22263 flow. Second operand has 27 states, 27 states have (on average 7.0) internal successors, (189), 27 states have internal predecessors, (189), 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 16:51:05,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:05,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:51:05,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:14,025 INFO L124 PetriNetUnfolderBase]: 7031/15214 cut-off events. [2024-01-31 16:51:14,025 INFO L125 PetriNetUnfolderBase]: For 451766/451769 co-relation queries the response was YES. [2024-01-31 16:51:14,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105702 conditions, 15214 events. 7031/15214 cut-off events. For 451766/451769 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 150927 event pairs, 1561 based on Foata normal form. 28/15234 useless extension candidates. Maximal degree in co-relation 105565. Up to 5359 conditions per place. [2024-01-31 16:51:14,194 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 774 selfloop transitions, 517 changer transitions 48/1342 dead transitions. [2024-01-31 16:51:14,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1342 transitions, 36363 flow [2024-01-31 16:51:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-31 16:51:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-31 16:51:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 509 transitions. [2024-01-31 16:51:14,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598012646793135 [2024-01-31 16:51:14,195 INFO L175 Difference]: Start difference. First operand has 541 places, 821 transitions, 22263 flow. Second operand 41 states and 509 transitions. [2024-01-31 16:51:14,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1342 transitions, 36363 flow [2024-01-31 16:51:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 1342 transitions, 35662 flow, removed 186 selfloop flow, removed 19 redundant places. [2024-01-31 16:51:17,256 INFO L231 Difference]: Finished difference. Result has 574 places, 994 transitions, 28328 flow [2024-01-31 16:51:17,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=21708, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=28328, PETRI_PLACES=574, PETRI_TRANSITIONS=994} [2024-01-31 16:51:17,257 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 548 predicate places. [2024-01-31 16:51:17,257 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 994 transitions, 28328 flow [2024-01-31 16:51:17,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.0) internal successors, (189), 27 states have internal predecessors, (189), 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 16:51:17,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:17,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:17,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:17,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-31 16:51:17,463 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:17,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1298384979, now seen corresponding path program 38 times [2024-01-31 16:51:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:17,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567270383] [2024-01-31 16:51:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:17,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:51:17,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:17,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567270383] [2024-01-31 16:51:17,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567270383] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:17,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465527538] [2024-01-31 16:51:17,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:51:17,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:17,981 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:17,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-31 16:51:18,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:51:18,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:18,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:51:18,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:18,459 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 161 treesize of output 105 [2024-01-31 16:51:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:51:18,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:20,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:20,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 208 [2024-01-31 16:51:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:51:20,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465527538] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:20,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:20,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2024-01-31 16:51:20,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285548165] [2024-01-31 16:51:20,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:20,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:51:20,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:20,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:51:20,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:51:20,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:51:20,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 994 transitions, 28328 flow. Second operand has 27 states, 27 states have (on average 7.0) internal successors, (189), 27 states have internal predecessors, (189), 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 16:51:20,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:20,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:51:20,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:32,159 INFO L124 PetriNetUnfolderBase]: 8699/18756 cut-off events. [2024-01-31 16:51:32,159 INFO L125 PetriNetUnfolderBase]: For 643028/643031 co-relation queries the response was YES. [2024-01-31 16:51:32,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138083 conditions, 18756 events. 8699/18756 cut-off events. For 643028/643031 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 190698 event pairs, 1416 based on Foata normal form. 92/18840 useless extension candidates. Maximal degree in co-relation 137937. Up to 4801 conditions per place. [2024-01-31 16:51:32,373 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 777 selfloop transitions, 768 changer transitions 57/1605 dead transitions. [2024-01-31 16:51:32,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1605 transitions, 45381 flow [2024-01-31 16:51:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-31 16:51:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-31 16:51:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 609 transitions. [2024-01-31 16:51:32,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2024-01-31 16:51:32,374 INFO L175 Difference]: Start difference. First operand has 574 places, 994 transitions, 28328 flow. Second operand 48 states and 609 transitions. [2024-01-31 16:51:32,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1605 transitions, 45381 flow [2024-01-31 16:51:37,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1605 transitions, 43270 flow, removed 1032 selfloop flow, removed 10 redundant places. [2024-01-31 16:51:37,632 INFO L231 Difference]: Finished difference. Result has 624 places, 1280 transitions, 38019 flow [2024-01-31 16:51:37,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=27050, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=38019, PETRI_PLACES=624, PETRI_TRANSITIONS=1280} [2024-01-31 16:51:37,633 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 598 predicate places. [2024-01-31 16:51:37,633 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 1280 transitions, 38019 flow [2024-01-31 16:51:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.0) internal successors, (189), 27 states have internal predecessors, (189), 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 16:51:37,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:37,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:37,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:37,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:37,845 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:37,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1907113167, now seen corresponding path program 39 times [2024-01-31 16:51:37,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:37,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476851325] [2024-01-31 16:51:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:37,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:51:38,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:38,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476851325] [2024-01-31 16:51:38,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476851325] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:38,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972961011] [2024-01-31 16:51:38,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:51:38,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:38,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:38,384 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:38,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-31 16:51:38,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-31 16:51:38,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:38,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-31 16:51:38,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:38,600 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 16:51:38,613 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 19 treesize of output 1 [2024-01-31 16:51:38,846 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 117 treesize of output 77 [2024-01-31 16:51:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:51:38,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:51:41,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972961011] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:41,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:41,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 30 [2024-01-31 16:51:41,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448046623] [2024-01-31 16:51:41,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:41,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:51:41,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:51:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:51:41,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:51:41,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 1280 transitions, 38019 flow. Second operand has 30 states, 30 states have (on average 6.933333333333334) internal successors, (208), 30 states have internal predecessors, (208), 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 16:51:41,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:41,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:51:41,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:53,073 INFO L124 PetriNetUnfolderBase]: 9326/20207 cut-off events. [2024-01-31 16:51:53,073 INFO L125 PetriNetUnfolderBase]: For 697069/697069 co-relation queries the response was YES. [2024-01-31 16:51:53,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148182 conditions, 20207 events. 9326/20207 cut-off events. For 697069/697069 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 207471 event pairs, 2914 based on Foata normal form. 10/20189 useless extension candidates. Maximal degree in co-relation 148024. Up to 7217 conditions per place. [2024-01-31 16:51:53,325 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 889 selfloop transitions, 592 changer transitions 27/1511 dead transitions. [2024-01-31 16:51:53,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1511 transitions, 46049 flow [2024-01-31 16:51:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:51:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:51:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 303 transitions. [2024-01-31 16:51:53,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156378600823045 [2024-01-31 16:51:53,327 INFO L175 Difference]: Start difference. First operand has 624 places, 1280 transitions, 38019 flow. Second operand 27 states and 303 transitions. [2024-01-31 16:51:53,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1511 transitions, 46049 flow [2024-01-31 16:52:00,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 1511 transitions, 44082 flow, removed 721 selfloop flow, removed 16 redundant places. [2024-01-31 16:52:00,607 INFO L231 Difference]: Finished difference. Result has 640 places, 1371 transitions, 40531 flow [2024-01-31 16:52:00,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=36241, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=511, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=40531, PETRI_PLACES=640, PETRI_TRANSITIONS=1371} [2024-01-31 16:52:00,608 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 614 predicate places. [2024-01-31 16:52:00,608 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 1371 transitions, 40531 flow [2024-01-31 16:52:00,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.933333333333334) internal successors, (208), 30 states have internal predecessors, (208), 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 16:52:00,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:00,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:00,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:00,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-01-31 16:52:00,818 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:00,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:00,819 INFO L85 PathProgramCache]: Analyzing trace with hash -251982761, now seen corresponding path program 40 times [2024-01-31 16:52:00,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:00,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548530309] [2024-01-31 16:52:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:00,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:52:01,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:01,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548530309] [2024-01-31 16:52:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548530309] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:01,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172253198] [2024-01-31 16:52:01,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:52:01,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:01,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:01,331 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:01,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-31 16:52:01,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:52:01,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:01,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 16:52:01,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:01,795 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 161 treesize of output 105 [2024-01-31 16:52:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:52:01,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:03,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:03,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 200 [2024-01-31 16:52:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:52:03,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172253198] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:03,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 27 [2024-01-31 16:52:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656027555] [2024-01-31 16:52:03,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:03,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:52:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:52:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:52:03,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 16:52:03,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 1371 transitions, 40531 flow. Second operand has 27 states, 27 states have (on average 7.0) internal successors, (189), 27 states have internal predecessors, (189), 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 16:52:03,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:03,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 16:52:03,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:17,799 INFO L124 PetriNetUnfolderBase]: 11779/25682 cut-off events. [2024-01-31 16:52:17,800 INFO L125 PetriNetUnfolderBase]: For 908233/908236 co-relation queries the response was YES. [2024-01-31 16:52:18,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190407 conditions, 25682 events. 11779/25682 cut-off events. For 908233/908236 co-relation queries the response was YES. Maximal size of possible extension queue 1423. Compared 273303 event pairs, 3197 based on Foata normal form. 34/25674 useless extension candidates. Maximal degree in co-relation 190244. Up to 7471 conditions per place. [2024-01-31 16:52:18,353 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1200 selfloop transitions, 754 changer transitions 53/2010 dead transitions. [2024-01-31 16:52:18,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 2010 transitions, 61660 flow [2024-01-31 16:52:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:52:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:52:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 443 transitions. [2024-01-31 16:52:18,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44344344344344344 [2024-01-31 16:52:18,355 INFO L175 Difference]: Start difference. First operand has 640 places, 1371 transitions, 40531 flow. Second operand 37 states and 443 transitions. [2024-01-31 16:52:18,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 2010 transitions, 61660 flow