./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:00:29,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:00:29,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:00:29,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:00:29,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:00:29,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:00:29,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:00:29,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:00:29,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:00:29,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:00:29,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:00:29,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:00:29,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:00:29,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:00:29,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:00:29,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:00:29,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:00:29,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:00:29,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:00:29,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:00:29,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:00:29,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:00:29,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:00:29,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:00:29,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:00:29,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:00:29,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:00:29,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:00:29,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:00:29,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:00:29,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:00:29,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:00:29,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:00:29,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:00:29,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:00:29,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:00:29,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:00:29,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:00:29,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:00:29,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:00:29,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:00:29,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:00:29,199 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:00:29,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:00:29,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:00:29,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:00:29,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:00:29,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:00:29,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:00:29,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:00:29,202 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:00:29,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:00:29,202 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:00:29,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:00:29,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:00:29,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:00:29,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:00:29,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:00:29,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:00:29,204 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:00:29,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:00:29,204 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:00:29,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:00:29,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:00:29,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:00:29,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:00:29,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:00:29,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:00:29,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:00:29,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:00:29,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:00:29,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:00:29,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:00:29,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:00:29,207 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:00:29,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:00:29,207 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:00:29,207 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:00:29,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:00:29,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:00:29,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:00:29,524 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:00:29,525 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:00:29,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-30 20:00:30,788 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:00:30,969 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:00:30,970 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-30 20:00:30,978 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/302cf1be7/8e768a750d424f189cf38ffd6f0434e0/FLAG9a59a8065 [2023-08-30 20:00:30,990 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/302cf1be7/8e768a750d424f189cf38ffd6f0434e0 [2023-08-30 20:00:30,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:00:30,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:00:30,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:00:30,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:00:30,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:00:30,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:00:30" (1/1) ... [2023-08-30 20:00:30,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4b4fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:30, skipping insertion in model container [2023-08-30 20:00:30,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:00:30" (1/1) ... [2023-08-30 20:00:31,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:00:31,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:00:31,240 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2023-08-30 20:00:31,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:00:31,266 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:00:31,304 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2023-08-30 20:00:31,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:00:31,322 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:00:31,323 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:00:31,329 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:00:31,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31 WrapperNode [2023-08-30 20:00:31,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:00:31,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:00:31,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:00:31,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:00:31,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,399 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 325 [2023-08-30 20:00:31,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:00:31,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:00:31,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:00:31,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:00:31,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,454 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:00:31,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:00:31,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:00:31,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:00:31,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (1/1) ... [2023-08-30 20:00:31,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:00:31,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:31,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:00:31,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:00:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:00:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:00:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:00:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:00:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:00:31,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:00:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:00:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:00:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:00:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:00:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:00:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:00:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:00:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:00:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:00:31,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:00:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:00:31,530 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:00:31,638 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:00:31,640 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:00:32,080 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:00:32,232 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:00:32,232 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 20:00:32,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:00:32 BoogieIcfgContainer [2023-08-30 20:00:32,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:00:32,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:00:32,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:00:32,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:00:32,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:00:30" (1/3) ... [2023-08-30 20:00:32,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e29a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:00:32, skipping insertion in model container [2023-08-30 20:00:32,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:31" (2/3) ... [2023-08-30 20:00:32,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e29a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:00:32, skipping insertion in model container [2023-08-30 20:00:32,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:00:32" (3/3) ... [2023-08-30 20:00:32,245 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-08-30 20:00:32,254 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:00:32,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:00:32,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:00:32,263 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:00:32,355 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 20:00:32,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 255 transitions, 534 flow [2023-08-30 20:00:32,482 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2023-08-30 20:00:32,482 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:00:32,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 252 events. 22/252 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-08-30 20:00:32,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 255 transitions, 534 flow [2023-08-30 20:00:32,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 242 transitions, 502 flow [2023-08-30 20:00:32,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:00:32,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 242 transitions, 502 flow [2023-08-30 20:00:32,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 242 transitions, 502 flow [2023-08-30 20:00:32,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 242 transitions, 502 flow [2023-08-30 20:00:32,572 INFO L130 PetriNetUnfolder]: 22/242 cut-off events. [2023-08-30 20:00:32,572 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:00:32,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 22/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-08-30 20:00:32,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 1962 [2023-08-30 20:00:40,786 INFO L134 LiptonReduction]: Checked pairs total: 3161 [2023-08-30 20:00:40,786 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-30 20:00:40,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:00:40,812 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@249bd2b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:00:40,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 20:00:40,820 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2023-08-30 20:00:40,820 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:00:40,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:40,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:40,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:40,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1137441367, now seen corresponding path program 1 times [2023-08-30 20:00:40,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:40,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957476402] [2023-08-30 20:00:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:41,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957476402] [2023-08-30 20:00:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957476402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:41,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:41,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 20:00:41,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203886736] [2023-08-30 20:00:41,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:41,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 20:00:41,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 20:00:41,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 20:00:41,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 507 [2023-08-30 20:00:41,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 84 flow. Second operand has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:41,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 507 [2023-08-30 20:00:41,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:41,391 INFO L130 PetriNetUnfolder]: 468/682 cut-off events. [2023-08-30 20:00:41,392 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-08-30 20:00:41,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 682 events. 468/682 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2010 event pairs, 333 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 1160. Up to 683 conditions per place. [2023-08-30 20:00:41,399 INFO L137 encePairwiseOnDemand]: 505/507 looper letters, 31 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-08-30 20:00:41,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 142 flow [2023-08-30 20:00:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 20:00:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 20:00:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 483 transitions. [2023-08-30 20:00:41,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47633136094674555 [2023-08-30 20:00:41,437 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 483 transitions. [2023-08-30 20:00:41,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 483 transitions. [2023-08-30 20:00:41,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:41,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 483 transitions. [2023-08-30 20:00:41,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 241.5) internal successors, (483), 2 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,454 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,455 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 84 flow. Second operand 2 states and 483 transitions. [2023-08-30 20:00:41,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 142 flow [2023-08-30 20:00:41,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 20:00:41,461 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 68 flow [2023-08-30 20:00:41,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2023-08-30 20:00:41,466 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2023-08-30 20:00:41,467 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 68 flow [2023-08-30 20:00:41,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:41,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:41,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:00:41,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:41,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash -341274689, now seen corresponding path program 1 times [2023-08-30 20:00:41,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:41,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500327867] [2023-08-30 20:00:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:41,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:41,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500327867] [2023-08-30 20:00:41,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500327867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:41,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:41,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:00:41,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389210710] [2023-08-30 20:00:41,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:41,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:00:41,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:00:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:00:41,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-08-30 20:00:41,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:41,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-08-30 20:00:41,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:41,981 INFO L130 PetriNetUnfolder]: 529/791 cut-off events. [2023-08-30 20:00:41,982 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 20:00:41,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 791 events. 529/791 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2481 event pairs, 384 based on Foata normal form. 42/687 useless extension candidates. Maximal degree in co-relation 1610. Up to 683 conditions per place. [2023-08-30 20:00:41,986 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 30 selfloop transitions, 2 changer transitions 17/49 dead transitions. [2023-08-30 20:00:41,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 205 flow [2023-08-30 20:00:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:00:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:00:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 896 transitions. [2023-08-30 20:00:41,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418145956607495 [2023-08-30 20:00:41,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 896 transitions. [2023-08-30 20:00:41,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 896 transitions. [2023-08-30 20:00:41,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:41,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 896 transitions. [2023-08-30 20:00:41,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,998 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:41,998 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 68 flow. Second operand 4 states and 896 transitions. [2023-08-30 20:00:41,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 205 flow [2023-08-30 20:00:41,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 20:00:42,001 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 86 flow [2023-08-30 20:00:42,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-30 20:00:42,002 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-30 20:00:42,002 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 86 flow [2023-08-30 20:00:42,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:42,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:42,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:00:42,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:42,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1803368648, now seen corresponding path program 1 times [2023-08-30 20:00:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:42,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382064197] [2023-08-30 20:00:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:42,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:00:42,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:42,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382064197] [2023-08-30 20:00:42,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382064197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:42,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:42,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:00:42,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409324660] [2023-08-30 20:00:42,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:42,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:00:42,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:42,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:00:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:00:42,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-08-30 20:00:42,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:42,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-08-30 20:00:42,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:42,457 INFO L130 PetriNetUnfolder]: 755/1159 cut-off events. [2023-08-30 20:00:42,458 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-30 20:00:42,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1159 events. 755/1159 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4347 event pairs, 579 based on Foata normal form. 116/1097 useless extension candidates. Maximal degree in co-relation 2646. Up to 684 conditions per place. [2023-08-30 20:00:42,462 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 31 selfloop transitions, 2 changer transitions 35/68 dead transitions. [2023-08-30 20:00:42,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 68 transitions, 314 flow [2023-08-30 20:00:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:00:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:00:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2023-08-30 20:00:42,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44497041420118344 [2023-08-30 20:00:42,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2023-08-30 20:00:42,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2023-08-30 20:00:42,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:42,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2023-08-30 20:00:42,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,475 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,475 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 86 flow. Second operand 5 states and 1128 transitions. [2023-08-30 20:00:42,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 68 transitions, 314 flow [2023-08-30 20:00:42,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 68 transitions, 310 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:00:42,478 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 108 flow [2023-08-30 20:00:42,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-30 20:00:42,479 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-30 20:00:42,479 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 108 flow [2023-08-30 20:00:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:42,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:42,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:00:42,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:42,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1356236085, now seen corresponding path program 1 times [2023-08-30 20:00:42,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:42,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669940836] [2023-08-30 20:00:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669940836] [2023-08-30 20:00:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669940836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:00:42,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887418755] [2023-08-30 20:00:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:42,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:00:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:00:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:00:42,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-08-30 20:00:42,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:42,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-08-30 20:00:42,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:42,845 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2023-08-30 20:00:42,845 INFO L131 PetriNetUnfolder]: For 431/431 co-relation queries the response was YES. [2023-08-30 20:00:42,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3097 conditions, 1143 events. 759/1143 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4122 event pairs, 586 based on Foata normal form. 76/1014 useless extension candidates. Maximal degree in co-relation 3088. Up to 685 conditions per place. [2023-08-30 20:00:42,850 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 32 selfloop transitions, 2 changer transitions 20/54 dead transitions. [2023-08-30 20:00:42,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 283 flow [2023-08-30 20:00:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:00:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:00:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 899 transitions. [2023-08-30 20:00:42,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432938856015779 [2023-08-30 20:00:42,855 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 899 transitions. [2023-08-30 20:00:42,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 899 transitions. [2023-08-30 20:00:42,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:42,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 899 transitions. [2023-08-30 20:00:42,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,862 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,862 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 108 flow. Second operand 4 states and 899 transitions. [2023-08-30 20:00:42,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 283 flow [2023-08-30 20:00:42,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 263 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 20:00:42,868 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 114 flow [2023-08-30 20:00:42,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-30 20:00:42,870 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2023-08-30 20:00:42,870 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 114 flow [2023-08-30 20:00:42,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:42,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:42,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:42,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:00:42,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:42,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2052825742, now seen corresponding path program 1 times [2023-08-30 20:00:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:42,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405099589] [2023-08-30 20:00:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:42,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:00:43,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:43,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405099589] [2023-08-30 20:00:43,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405099589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:43,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:43,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 20:00:43,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015206628] [2023-08-30 20:00:43,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:00:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:00:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:00:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 507 [2023-08-30 20:00:43,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:43,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:43,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 507 [2023-08-30 20:00:43,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:43,215 INFO L130 PetriNetUnfolder]: 834/1218 cut-off events. [2023-08-30 20:00:43,215 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-08-30 20:00:43,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 1218 events. 834/1218 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4372 event pairs, 333 based on Foata normal form. 1/972 useless extension candidates. Maximal degree in co-relation 3221. Up to 642 conditions per place. [2023-08-30 20:00:43,220 INFO L137 encePairwiseOnDemand]: 504/507 looper letters, 47 selfloop transitions, 2 changer transitions 6/55 dead transitions. [2023-08-30 20:00:43,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 289 flow [2023-08-30 20:00:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:00:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:00:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-08-30 20:00:43,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472715318869165 [2023-08-30 20:00:43,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-08-30 20:00:43,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-08-30 20:00:43,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:43,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-08-30 20:00:43,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:43,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:43,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:43,229 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 114 flow. Second operand 3 states and 719 transitions. [2023-08-30 20:00:43,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 289 flow [2023-08-30 20:00:43,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:00:43,233 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 124 flow [2023-08-30 20:00:43,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-30 20:00:43,236 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-08-30 20:00:43,236 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 124 flow [2023-08-30 20:00:43,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:43,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:43,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:43,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:00:43,237 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:43,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash 402993380, now seen corresponding path program 1 times [2023-08-30 20:00:43,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:43,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338833134] [2023-08-30 20:00:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:43,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338833134] [2023-08-30 20:00:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338833134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483818719] [2023-08-30 20:00:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:43,445 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) [2023-08-30 20:00:43,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:00:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:43,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:00:43,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:43,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483818719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:43,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:43,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 20:00:43,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940547108] [2023-08-30 20:00:43,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:43,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:00:43,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:43,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:00:43,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:00:44,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 507 [2023-08-30 20:00:44,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 124 flow. Second operand has 11 states, 11 states have (on average 207.27272727272728) internal successors, (2280), 11 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:44,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 507 [2023-08-30 20:00:44,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:44,436 INFO L130 PetriNetUnfolder]: 1355/2016 cut-off events. [2023-08-30 20:00:44,436 INFO L131 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2023-08-30 20:00:44,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5516 conditions, 2016 events. 1355/2016 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8244 event pairs, 714 based on Foata normal form. 72/1706 useless extension candidates. Maximal degree in co-relation 5505. Up to 1218 conditions per place. [2023-08-30 20:00:44,443 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 33 selfloop transitions, 3 changer transitions 42/78 dead transitions. [2023-08-30 20:00:44,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 419 flow [2023-08-30 20:00:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:00:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:00:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1293 transitions. [2023-08-30 20:00:44,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250493096646943 [2023-08-30 20:00:44,447 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1293 transitions. [2023-08-30 20:00:44,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1293 transitions. [2023-08-30 20:00:44,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:44,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1293 transitions. [2023-08-30 20:00:44,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 215.5) internal successors, (1293), 6 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,455 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,456 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 124 flow. Second operand 6 states and 1293 transitions. [2023-08-30 20:00:44,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 419 flow [2023-08-30 20:00:44,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:00:44,459 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 148 flow [2023-08-30 20:00:44,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-08-30 20:00:44,462 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-08-30 20:00:44,463 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 148 flow [2023-08-30 20:00:44,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.27272727272728) internal successors, (2280), 11 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:44,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:44,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 20:00:44,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 20:00:44,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:44,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1520183157, now seen corresponding path program 2 times [2023-08-30 20:00:44,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:44,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110012478] [2023-08-30 20:00:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:44,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:00:44,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:44,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110012478] [2023-08-30 20:00:44,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110012478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:44,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:44,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:00:44,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6472665] [2023-08-30 20:00:44,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:44,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:00:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:00:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:00:44,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-30 20:00:44,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:44,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-30 20:00:44,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:45,029 INFO L130 PetriNetUnfolder]: 906/1311 cut-off events. [2023-08-30 20:00:45,030 INFO L131 PetriNetUnfolder]: For 950/950 co-relation queries the response was YES. [2023-08-30 20:00:45,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 1311 events. 906/1311 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4447 event pairs, 287 based on Foata normal form. 34/1052 useless extension candidates. Maximal degree in co-relation 3971. Up to 844 conditions per place. [2023-08-30 20:00:45,037 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 43 selfloop transitions, 3 changer transitions 5/51 dead transitions. [2023-08-30 20:00:45,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 308 flow [2023-08-30 20:00:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:00:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:00:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-08-30 20:00:45,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46679815910585143 [2023-08-30 20:00:45,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-08-30 20:00:45,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-08-30 20:00:45,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:45,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-08-30 20:00:45,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:45,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:45,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:45,049 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 148 flow. Second operand 3 states and 710 transitions. [2023-08-30 20:00:45,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 308 flow [2023-08-30 20:00:45,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 280 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 20:00:45,053 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 153 flow [2023-08-30 20:00:45,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-30 20:00:45,054 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-30 20:00:45,054 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 153 flow [2023-08-30 20:00:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:45,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:45,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 20:00:45,055 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:45,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash -821181061, now seen corresponding path program 3 times [2023-08-30 20:00:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:45,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101439529] [2023-08-30 20:00:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:45,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:45,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:45,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101439529] [2023-08-30 20:00:45,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101439529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:45,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143301550] [2023-08-30 20:00:45,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:00:45,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:45,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:45,921 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) [2023-08-30 20:00:45,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:00:46,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:00:46,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:46,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:00:46,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:46,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 838 treesize of output 822 [2023-08-30 20:00:46,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:00:46,304 INFO L350 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 23 treesize of output 7 [2023-08-30 20:00:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:00:46,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:00:46,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143301550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:46,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:00:46,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2023-08-30 20:00:46,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256213551] [2023-08-30 20:00:46,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:46,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:00:46,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:46,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:00:46,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:00:46,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 507 [2023-08-30 20:00:46,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 205.625) internal successors, (1645), 8 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:46,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:46,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 507 [2023-08-30 20:00:46,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:46,745 INFO L130 PetriNetUnfolder]: 1046/1548 cut-off events. [2023-08-30 20:00:46,745 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-08-30 20:00:46,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4682 conditions, 1548 events. 1046/1548 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5963 event pairs, 300 based on Foata normal form. 28/1283 useless extension candidates. Maximal degree in co-relation 4669. Up to 901 conditions per place. [2023-08-30 20:00:46,753 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 80 selfloop transitions, 6 changer transitions 2/88 dead transitions. [2023-08-30 20:00:46,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 534 flow [2023-08-30 20:00:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:00:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:00:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1489 transitions. [2023-08-30 20:00:46,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195548041701888 [2023-08-30 20:00:46,757 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1489 transitions. [2023-08-30 20:00:46,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1489 transitions. [2023-08-30 20:00:46,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:46,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1489 transitions. [2023-08-30 20:00:46,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 212.71428571428572) internal successors, (1489), 7 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:46,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:46,766 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:46,766 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 153 flow. Second operand 7 states and 1489 transitions. [2023-08-30 20:00:46,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 534 flow [2023-08-30 20:00:46,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 509 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 20:00:46,769 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 189 flow [2023-08-30 20:00:46,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=189, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-30 20:00:46,770 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-08-30 20:00:46,770 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 189 flow [2023-08-30 20:00:46,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 205.625) internal successors, (1645), 8 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:46,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:46,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:46,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:46,984 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 [2023-08-30 20:00:46,984 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:46,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2136771815, now seen corresponding path program 4 times [2023-08-30 20:00:46,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:46,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387794215] [2023-08-30 20:00:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:47,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387794215] [2023-08-30 20:00:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387794215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:47,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798225031] [2023-08-30 20:00:47,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:00:47,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:47,769 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) [2023-08-30 20:00:47,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:00:47,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:00:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 20:00:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:48,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:00:48,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:00:48,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:00:48,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:00:48,258 INFO L350 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 25 treesize of output 7 [2023-08-30 20:00:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:48,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:48,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:48,491 INFO L350 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 157 treesize of output 141 [2023-08-30 20:00:48,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 20:00:48,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-08-30 20:00:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:48,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798225031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:48,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:48,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-08-30 20:00:48,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686393430] [2023-08-30 20:00:48,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:48,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:00:48,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:48,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:00:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=744, Unknown=2, NotChecked=0, Total=870 [2023-08-30 20:00:50,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 507 [2023-08-30 20:00:50,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 189 flow. Second operand has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:50,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:50,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 507 [2023-08-30 20:00:50,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:52,259 INFO L130 PetriNetUnfolder]: 3012/4487 cut-off events. [2023-08-30 20:00:52,260 INFO L131 PetriNetUnfolder]: For 4802/4802 co-relation queries the response was YES. [2023-08-30 20:00:52,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14807 conditions, 4487 events. 3012/4487 cut-off events. For 4802/4802 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21533 event pairs, 762 based on Foata normal form. 198/4072 useless extension candidates. Maximal degree in co-relation 14791. Up to 1109 conditions per place. [2023-08-30 20:00:52,285 INFO L137 encePairwiseOnDemand]: 499/507 looper letters, 202 selfloop transitions, 29 changer transitions 24/255 dead transitions. [2023-08-30 20:00:52,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 255 transitions, 1633 flow [2023-08-30 20:00:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:00:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:00:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3988 transitions. [2023-08-30 20:00:52,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575398960014345 [2023-08-30 20:00:52,295 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3988 transitions. [2023-08-30 20:00:52,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3988 transitions. [2023-08-30 20:00:52,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:52,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3988 transitions. [2023-08-30 20:00:52,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 181.27272727272728) internal successors, (3988), 22 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 507.0) internal successors, (11661), 23 states have internal predecessors, (11661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,321 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 507.0) internal successors, (11661), 23 states have internal predecessors, (11661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,321 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 189 flow. Second operand 22 states and 3988 transitions. [2023-08-30 20:00:52,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 255 transitions, 1633 flow [2023-08-30 20:00:52,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 255 transitions, 1612 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 20:00:52,332 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 498 flow [2023-08-30 20:00:52,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=498, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-08-30 20:00:52,333 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2023-08-30 20:00:52,333 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 498 flow [2023-08-30 20:00:52,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:52,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:52,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:52,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:52,547 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:52,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:52,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1230266139, now seen corresponding path program 5 times [2023-08-30 20:00:52,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:52,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735059928] [2023-08-30 20:00:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:52,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:00:52,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:52,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735059928] [2023-08-30 20:00:52,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735059928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:52,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:52,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:00:52,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479796597] [2023-08-30 20:00:52,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:52,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:00:52,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:00:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:00:52,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 507 [2023-08-30 20:00:52,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 498 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:52,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 507 [2023-08-30 20:00:52,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:52,950 INFO L130 PetriNetUnfolder]: 1118/1789 cut-off events. [2023-08-30 20:00:52,951 INFO L131 PetriNetUnfolder]: For 6358/6358 co-relation queries the response was YES. [2023-08-30 20:00:52,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7589 conditions, 1789 events. 1118/1789 cut-off events. For 6358/6358 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7126 event pairs, 405 based on Foata normal form. 60/1658 useless extension candidates. Maximal degree in co-relation 7563. Up to 1363 conditions per place. [2023-08-30 20:00:52,965 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 68 selfloop transitions, 4 changer transitions 1/73 dead transitions. [2023-08-30 20:00:52,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 665 flow [2023-08-30 20:00:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:00:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:00:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2023-08-30 20:00:52,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45825115055884286 [2023-08-30 20:00:52,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2023-08-30 20:00:52,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2023-08-30 20:00:52,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:52,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2023-08-30 20:00:52,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,973 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 498 flow. Second operand 3 states and 697 transitions. [2023-08-30 20:00:52,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 665 flow [2023-08-30 20:00:52,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 546 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-30 20:00:52,990 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 401 flow [2023-08-30 20:00:52,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-08-30 20:00:52,991 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 41 predicate places. [2023-08-30 20:00:52,991 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 401 flow [2023-08-30 20:00:52,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:52,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:52,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:52,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 20:00:52,992 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:52,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash 118049101, now seen corresponding path program 1 times [2023-08-30 20:00:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:52,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177135678] [2023-08-30 20:00:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:00:53,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:53,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177135678] [2023-08-30 20:00:53,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177135678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:53,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135242008] [2023-08-30 20:00:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:53,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:53,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:53,162 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) [2023-08-30 20:00:53,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:00:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:00:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:00:53,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:00:53,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135242008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:53,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:53,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 20:00:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545728445] [2023-08-30 20:00:53,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:53,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:00:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:00:53,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:00:53,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 507 [2023-08-30 20:00:53,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 401 flow. Second operand has 11 states, 11 states have (on average 207.0) internal successors, (2277), 11 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:53,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:53,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 507 [2023-08-30 20:00:53,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:54,119 INFO L130 PetriNetUnfolder]: 1919/3133 cut-off events. [2023-08-30 20:00:54,119 INFO L131 PetriNetUnfolder]: For 8872/8872 co-relation queries the response was YES. [2023-08-30 20:00:54,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12186 conditions, 3133 events. 1919/3133 cut-off events. For 8872/8872 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14911 event pairs, 935 based on Foata normal form. 176/2969 useless extension candidates. Maximal degree in co-relation 12164. Up to 1742 conditions per place. [2023-08-30 20:00:54,143 INFO L137 encePairwiseOnDemand]: 502/507 looper letters, 95 selfloop transitions, 9 changer transitions 17/121 dead transitions. [2023-08-30 20:00:54,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 121 transitions, 947 flow [2023-08-30 20:00:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:00:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:00:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-08-30 20:00:54,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227481919789612 [2023-08-30 20:00:54,147 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-08-30 20:00:54,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-08-30 20:00:54,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:54,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-08-30 20:00:54,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:54,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:54,211 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:54,211 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 401 flow. Second operand 6 states and 1286 transitions. [2023-08-30 20:00:54,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 121 transitions, 947 flow [2023-08-30 20:00:54,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 121 transitions, 916 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 20:00:54,224 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 447 flow [2023-08-30 20:00:54,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=447, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-08-30 20:00:54,225 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2023-08-30 20:00:54,225 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 447 flow [2023-08-30 20:00:54,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.0) internal successors, (2277), 11 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:54,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:54,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:54,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:54,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:54,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:54,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:54,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1946385854, now seen corresponding path program 2 times [2023-08-30 20:00:54,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:54,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172165495] [2023-08-30 20:00:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:54,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:00:55,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:55,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172165495] [2023-08-30 20:00:55,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172165495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:55,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579906068] [2023-08-30 20:00:55,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:00:55,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:55,856 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) [2023-08-30 20:00:55,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:00:56,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:00:56,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 20:00:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:56,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:00:56,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 20:00:56,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:56,775 INFO L350 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 31 [2023-08-30 20:00:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:00:56,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:57,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:57,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 190 [2023-08-30 20:00:57,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:57,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 97 [2023-08-30 20:00:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:00:58,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579906068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:58,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:58,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 44 [2023-08-30 20:00:58,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383954596] [2023-08-30 20:00:58,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:58,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 20:00:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 20:00:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1712, Unknown=2, NotChecked=0, Total=1980 [2023-08-30 20:01:01,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 507 [2023-08-30 20:01:01,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 447 flow. Second operand has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:01,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 507 [2023-08-30 20:01:01,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:04,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:06,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:08,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:22,536 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 95 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:01:29,632 WARN L222 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 92 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:01:32,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:35,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:37,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:39,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:41,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:01:42,106 INFO L130 PetriNetUnfolder]: 2218/3792 cut-off events. [2023-08-30 20:01:42,106 INFO L131 PetriNetUnfolder]: For 10414/10414 co-relation queries the response was YES. [2023-08-30 20:01:42,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14328 conditions, 3792 events. 2218/3792 cut-off events. For 10414/10414 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 20237 event pairs, 530 based on Foata normal form. 64/3489 useless extension candidates. Maximal degree in co-relation 14304. Up to 794 conditions per place. [2023-08-30 20:01:42,124 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 328 selfloop transitions, 110 changer transitions 29/467 dead transitions. [2023-08-30 20:01:42,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 467 transitions, 3301 flow [2023-08-30 20:01:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 20:01:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 20:01:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8706 transitions. [2023-08-30 20:01:42,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3066356720202874 [2023-08-30 20:01:42,148 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8706 transitions. [2023-08-30 20:01:42,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8706 transitions. [2023-08-30 20:01:42,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:42,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8706 transitions. [2023-08-30 20:01:42,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 155.46428571428572) internal successors, (8706), 56 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:42,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 507.0) internal successors, (28899), 57 states have internal predecessors, (28899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:42,208 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 507.0) internal successors, (28899), 57 states have internal predecessors, (28899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:42,209 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 447 flow. Second operand 56 states and 8706 transitions. [2023-08-30 20:01:42,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 467 transitions, 3301 flow [2023-08-30 20:01:42,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 467 transitions, 3198 flow, removed 43 selfloop flow, removed 3 redundant places. [2023-08-30 20:01:42,234 INFO L231 Difference]: Finished difference. Result has 161 places, 181 transitions, 1673 flow [2023-08-30 20:01:42,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1673, PETRI_PLACES=161, PETRI_TRANSITIONS=181} [2023-08-30 20:01:42,235 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2023-08-30 20:01:42,235 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 181 transitions, 1673 flow [2023-08-30 20:01:42,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:42,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:42,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:42,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:01:42,447 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,SelfDestructingSolverStorable11 [2023-08-30 20:01:42,447 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:01:42,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash -716681592, now seen corresponding path program 3 times [2023-08-30 20:01:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:42,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026478918] [2023-08-30 20:01:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:42,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:01:43,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026478918] [2023-08-30 20:01:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026478918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:01:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806484785] [2023-08-30 20:01:43,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:01:43,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:43,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:01:43,853 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) [2023-08-30 20:01:43,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:01:44,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:01:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:01:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 20:01:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:01:44,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:01:44,826 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 20:01:44,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2023-08-30 20:01:44,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2023-08-30 20:01:44,901 INFO L350 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 23 treesize of output 7 [2023-08-30 20:01:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:01:44,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:01:45,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:45,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 122 [2023-08-30 20:01:45,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-30 20:01:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:01:45,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806484785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:01:45,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:01:45,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2023-08-30 20:01:45,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562262237] [2023-08-30 20:01:45,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:01:45,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 20:01:45,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:45,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 20:01:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1469, Unknown=5, NotChecked=0, Total=1640 [2023-08-30 20:01:48,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 20:01:54,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 20:01:54,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 507 [2023-08-30 20:01:54,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 181 transitions, 1673 flow. Second operand has 41 states, 41 states have (on average 176.1951219512195) internal successors, (7224), 41 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:54,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:54,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 507 [2023-08-30 20:01:54,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:02:02,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 20:02:09,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 20:02:16,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 20:02:36,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 20:02:44,023 INFO L130 PetriNetUnfolder]: 19460/31112 cut-off events. [2023-08-30 20:02:44,023 INFO L131 PetriNetUnfolder]: For 224127/224127 co-relation queries the response was YES. [2023-08-30 20:02:44,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159311 conditions, 31112 events. 19460/31112 cut-off events. For 224127/224127 co-relation queries the response was YES. Maximal size of possible extension queue 1060. Compared 222191 event pairs, 2384 based on Foata normal form. 2490/32590 useless extension candidates. Maximal degree in co-relation 159261. Up to 7061 conditions per place. [2023-08-30 20:02:44,289 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1497 selfloop transitions, 940 changer transitions 278/2715 dead transitions. [2023-08-30 20:02:44,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 2715 transitions, 27369 flow [2023-08-30 20:02:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2023-08-30 20:02:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2023-08-30 20:02:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 39035 transitions. [2023-08-30 20:02:44,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597762170731258 [2023-08-30 20:02:44,341 INFO L72 ComplementDD]: Start complementDD. Operand 214 states and 39035 transitions. [2023-08-30 20:02:44,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 214 states and 39035 transitions. [2023-08-30 20:02:44,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:44,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 214 states and 39035 transitions. [2023-08-30 20:02:44,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 215 states, 214 states have (on average 182.40654205607476) internal successors, (39035), 214 states have internal predecessors, (39035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:44,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 215 states, 215 states have (on average 507.0) internal successors, (109005), 215 states have internal predecessors, (109005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:44,535 INFO L81 ComplementDD]: Finished complementDD. Result has 215 states, 215 states have (on average 507.0) internal successors, (109005), 215 states have internal predecessors, (109005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:44,536 INFO L175 Difference]: Start difference. First operand has 161 places, 181 transitions, 1673 flow. Second operand 214 states and 39035 transitions. [2023-08-30 20:02:44,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 2715 transitions, 27369 flow [2023-08-30 20:02:46,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 2715 transitions, 24164 flow, removed 1551 selfloop flow, removed 8 redundant places. [2023-08-30 20:02:46,216 INFO L231 Difference]: Finished difference. Result has 485 places, 1156 transitions, 13661 flow [2023-08-30 20:02:46,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=214, PETRI_FLOW=13661, PETRI_PLACES=485, PETRI_TRANSITIONS=1156} [2023-08-30 20:02:46,218 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 450 predicate places. [2023-08-30 20:02:46,218 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1156 transitions, 13661 flow [2023-08-30 20:02:46,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 176.1951219512195) internal successors, (7224), 41 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:46,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:02:46,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:02:46,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:02:46,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:46,434 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:02:46,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:02:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1581646834, now seen corresponding path program 4 times [2023-08-30 20:02:46,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:02:46,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138962781] [2023-08-30 20:02:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:02:46,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:02:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:02:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:02:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:02:48,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138962781] [2023-08-30 20:02:48,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138962781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:02:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417116955] [2023-08-30 20:02:48,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:02:48,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:48,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:02:48,689 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) [2023-08-30 20:02:48,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:02:48,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:02:48,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:02:48,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 20:02:48,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:02:49,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:02:49,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 20:02:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:02:49,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 20:02:50,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:50,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-08-30 20:02:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:02:50,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:02:50,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:50,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 516 treesize of output 528 [2023-08-30 20:02:50,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:50,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 365 [2023-08-30 20:02:51,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:02:51,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 290 [2023-08-30 20:03:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:03:10,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417116955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:03:10,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:03:10,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 47 [2023-08-30 20:03:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971156397] [2023-08-30 20:03:10,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:03:10,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 20:03:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:03:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 20:03:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1997, Unknown=4, NotChecked=0, Total=2256 [2023-08-30 20:03:14,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-08-30 20:03:14,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1156 transitions, 13661 flow. Second operand has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:14,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:03:14,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-08-30 20:03:14,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:03:18,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:03:25,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:03:27,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:03:36,450 INFO L130 PetriNetUnfolder]: 15769/25593 cut-off events. [2023-08-30 20:03:36,450 INFO L131 PetriNetUnfolder]: For 3109853/3109853 co-relation queries the response was YES. [2023-08-30 20:03:36,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253255 conditions, 25593 events. 15769/25593 cut-off events. For 3109853/3109853 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 181195 event pairs, 4339 based on Foata normal form. 374/25067 useless extension candidates. Maximal degree in co-relation 253083. Up to 13661 conditions per place. [2023-08-30 20:03:37,013 INFO L137 encePairwiseOnDemand]: 489/507 looper letters, 836 selfloop transitions, 480 changer transitions 51/1367 dead transitions. [2023-08-30 20:03:37,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1367 transitions, 19456 flow [2023-08-30 20:03:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 20:03:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 20:03:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6691 transitions. [2023-08-30 20:03:37,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29993724224493457 [2023-08-30 20:03:37,023 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6691 transitions. [2023-08-30 20:03:37,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6691 transitions. [2023-08-30 20:03:37,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:03:37,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6691 transitions. [2023-08-30 20:03:37,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 152.0681818181818) internal successors, (6691), 44 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:37,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 507.0) internal successors, (22815), 45 states have internal predecessors, (22815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:37,051 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 507.0) internal successors, (22815), 45 states have internal predecessors, (22815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:37,051 INFO L175 Difference]: Start difference. First operand has 485 places, 1156 transitions, 13661 flow. Second operand 44 states and 6691 transitions. [2023-08-30 20:03:37,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1367 transitions, 19456 flow [2023-08-30 20:04:02,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1367 transitions, 16955 flow, removed 1137 selfloop flow, removed 50 redundant places. [2023-08-30 20:04:02,074 INFO L231 Difference]: Finished difference. Result has 477 places, 1061 transitions, 12897 flow [2023-08-30 20:04:02,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=9752, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=12897, PETRI_PLACES=477, PETRI_TRANSITIONS=1061} [2023-08-30 20:04:02,076 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 442 predicate places. [2023-08-30 20:04:02,076 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1061 transitions, 12897 flow [2023-08-30 20:04:02,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:02,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:04:02,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:04:02,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 20:04:02,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:02,278 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:04:02,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:04:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash -861947296, now seen corresponding path program 5 times [2023-08-30 20:04:02,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:04:02,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162234574] [2023-08-30 20:04:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:04:02,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:04:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:04:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:04:03,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:04:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162234574] [2023-08-30 20:04:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162234574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:04:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719870870] [2023-08-30 20:04:03,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:04:03,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:04:03,756 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) [2023-08-30 20:04:03,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:04:04,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:04:04,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:04:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 20:04:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:04:04,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:04:04,062 INFO L321 Elim1Store]: treesize reduction 63, result has 32.3 percent of original size [2023-08-30 20:04:04,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 20:04:04,229 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 20:04:04,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 20:04:04,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:04:04,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 20:04:04,906 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 20:04:04,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 42 [2023-08-30 20:04:04,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-08-30 20:04:05,018 INFO L350 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 23 treesize of output 7 [2023-08-30 20:04:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:04:05,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:04:05,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:04:05,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 262 treesize of output 298 [2023-08-30 20:04:05,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:04:05,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 111 [2023-08-30 20:04:05,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-30 20:04:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:04:08,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719870870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:04:08,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:04:08,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 45 [2023-08-30 20:04:08,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750499419] [2023-08-30 20:04:08,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:04:08,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 20:04:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:04:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 20:04:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1887, Unknown=4, NotChecked=0, Total=2070 [2023-08-30 20:04:11,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:04:11,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 507 [2023-08-30 20:04:11,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1061 transitions, 12897 flow. Second operand has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:11,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:04:11,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 507 [2023-08-30 20:04:11,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:04:30,767 WARN L222 SmtUtils]: Spent 16.30s on a formula simplification. DAG size of input: 102 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:04:32,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:04:39,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:04:57,934 WARN L222 SmtUtils]: Spent 16.22s on a formula simplification. DAG size of input: 112 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:05:00,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:02,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:04,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:06,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:16,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:18,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:20,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:25,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:27,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:29,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:31,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:33,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:36,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:38,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:40,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:42,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:44,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:46,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:48,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:50,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:52,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:54,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:56,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:05:58,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:06:01,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:06:04,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:06:11,780 INFO L130 PetriNetUnfolder]: 21795/35353 cut-off events. [2023-08-30 20:06:11,780 INFO L131 PetriNetUnfolder]: For 1723863/1723863 co-relation queries the response was YES. [2023-08-30 20:06:12,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295933 conditions, 35353 events. 21795/35353 cut-off events. For 1723863/1723863 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 263339 event pairs, 5880 based on Foata normal form. 98/34315 useless extension candidates. Maximal degree in co-relation 295780. Up to 15039 conditions per place. [2023-08-30 20:06:12,644 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1246 selfloop transitions, 877 changer transitions 28/2151 dead transitions. [2023-08-30 20:06:12,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 2151 transitions, 30727 flow [2023-08-30 20:06:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-08-30 20:06:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-08-30 20:06:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 11832 transitions. [2023-08-30 20:06:12,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2778247393632009 [2023-08-30 20:06:12,655 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 11832 transitions. [2023-08-30 20:06:12,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 11832 transitions. [2023-08-30 20:06:12,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:06:12,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 11832 transitions. [2023-08-30 20:06:12,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 140.85714285714286) internal successors, (11832), 84 states have internal predecessors, (11832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:12,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 507.0) internal successors, (43095), 85 states have internal predecessors, (43095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:12,708 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 507.0) internal successors, (43095), 85 states have internal predecessors, (43095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:12,709 INFO L175 Difference]: Start difference. First operand has 477 places, 1061 transitions, 12897 flow. Second operand 84 states and 11832 transitions. [2023-08-30 20:06:12,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 2151 transitions, 30727 flow [2023-08-30 20:06:34,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 2151 transitions, 29639 flow, removed 442 selfloop flow, removed 16 redundant places. [2023-08-30 20:06:34,575 INFO L231 Difference]: Finished difference. Result has 582 places, 1549 transitions, 22386 flow [2023-08-30 20:06:34,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=12442, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=22386, PETRI_PLACES=582, PETRI_TRANSITIONS=1549} [2023-08-30 20:06:34,576 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 547 predicate places. [2023-08-30 20:06:34,576 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 1549 transitions, 22386 flow [2023-08-30 20:06:34,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:34,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:06:34,577 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:06:34,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:06:34,777 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,SelfDestructingSolverStorable14 [2023-08-30 20:06:34,778 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:06:34,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:06:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -148778941, now seen corresponding path program 6 times [2023-08-30 20:06:34,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:06:34,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432813233] [2023-08-30 20:06:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:06:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:06:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:06:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:06:34,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:06:34,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432813233] [2023-08-30 20:06:34,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432813233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:06:34,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552481079] [2023-08-30 20:06:34,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:06:34,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:06:34,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:06:34,953 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) [2023-08-30 20:06:34,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:06:35,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:06:35,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:06:35,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:06:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:06:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 20:06:35,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:06:35,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552481079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:06:35,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:06:35,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-08-30 20:06:35,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111007558] [2023-08-30 20:06:35,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:06:35,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:06:35,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:06:35,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:06:35,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 20:06:35,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-30 20:06:35,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 1549 transitions, 22386 flow. Second operand has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:35,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:06:35,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-30 20:06:35,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:06:55,655 INFO L130 PetriNetUnfolder]: 30813/48716 cut-off events. [2023-08-30 20:06:55,655 INFO L131 PetriNetUnfolder]: For 3547844/3547844 co-relation queries the response was YES. [2023-08-30 20:06:56,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468423 conditions, 48716 events. 30813/48716 cut-off events. For 3547844/3547844 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 362939 event pairs, 6556 based on Foata normal form. 1834/47828 useless extension candidates. Maximal degree in co-relation 468233. Up to 18979 conditions per place. [2023-08-30 20:06:57,325 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 1551 selfloop transitions, 198 changer transitions 67/1816 dead transitions. [2023-08-30 20:06:57,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1816 transitions, 29996 flow [2023-08-30 20:06:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:06:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:06:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 953 transitions. [2023-08-30 20:06:57,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46992110453648916 [2023-08-30 20:06:57,327 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 953 transitions. [2023-08-30 20:06:57,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 953 transitions. [2023-08-30 20:06:57,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:06:57,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 953 transitions. [2023-08-30 20:06:57,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:57,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:57,331 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:57,332 INFO L175 Difference]: Start difference. First operand has 582 places, 1549 transitions, 22386 flow. Second operand 4 states and 953 transitions. [2023-08-30 20:06:57,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 1816 transitions, 29996 flow [2023-08-30 20:08:04,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1816 transitions, 27982 flow, removed 793 selfloop flow, removed 55 redundant places. [2023-08-30 20:08:04,530 INFO L231 Difference]: Finished difference. Result has 491 places, 1212 transitions, 16864 flow [2023-08-30 20:08:04,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=16279, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1043, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=16864, PETRI_PLACES=491, PETRI_TRANSITIONS=1212} [2023-08-30 20:08:04,532 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 456 predicate places. [2023-08-30 20:08:04,532 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1212 transitions, 16864 flow [2023-08-30 20:08:04,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:04,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:08:04,533 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:08:04,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:08:04,733 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,SelfDestructingSolverStorable15 [2023-08-30 20:08:04,733 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:08:04,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:08:04,734 INFO L85 PathProgramCache]: Analyzing trace with hash -784039819, now seen corresponding path program 7 times [2023-08-30 20:08:04,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:08:04,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082888152] [2023-08-30 20:08:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:08:04,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:08:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:08:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:08:06,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:08:06,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082888152] [2023-08-30 20:08:06,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082888152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:08:06,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615747345] [2023-08-30 20:08:06,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:08:06,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:08:06,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:08:06,725 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) [2023-08-30 20:08:06,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:08:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:08:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 20:08:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:08:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:08:07,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:08:07,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:08:07,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:08:07,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:08:07,534 INFO L350 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 32 [2023-08-30 20:08:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:08:07,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:08:08,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:08:08,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 964 treesize of output 912 [2023-08-30 20:08:08,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:08:08,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 365 [2023-08-30 20:08:08,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:08:08,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 290 [2023-08-30 20:08:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 20:08:21,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615747345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:08:21,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:08:21,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-08-30 20:08:21,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170362178] [2023-08-30 20:08:21,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:08:21,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 20:08:21,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:08:21,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 20:08:21,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1767, Unknown=5, NotChecked=0, Total=1980 [2023-08-30 20:08:24,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-08-30 20:08:24,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1212 transitions, 16864 flow. Second operand has 45 states, 45 states have (on average 147.0222222222222) internal successors, (6616), 45 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:24,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:08:24,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-08-30 20:08:24,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:08:32,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:08:45,848 WARN L222 SmtUtils]: Spent 12.47s on a formula simplification. DAG size of input: 120 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:08:55,613 WARN L222 SmtUtils]: Spent 8.39s on a formula simplification. DAG size of input: 83 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:09:02,621 WARN L222 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 116 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:09:15,475 WARN L222 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 100 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:09:26,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:28,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:30,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:32,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:34,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:36,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:40,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:42,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:44,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:46,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:48,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:50,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:52,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:09:54,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:10:02,158 WARN L222 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 112 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:10:10,159 WARN L222 SmtUtils]: Spent 7.68s on a formula simplification. DAG size of input: 95 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:10:25,188 WARN L222 SmtUtils]: Spent 13.90s on a formula simplification. DAG size of input: 117 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:10:31,597 WARN L222 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 101 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:10:52,827 WARN L222 SmtUtils]: Spent 14.39s on a formula simplification. DAG size of input: 108 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:10:55,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:10:57,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:10:59,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:01,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:03,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:05,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:07,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:09,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:11,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:17,711 WARN L222 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 86 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:11:20,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:29,031 WARN L222 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 113 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:11:34,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:37,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:39,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:41,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:43,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:45,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:47,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:51,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:57,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:01,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:03,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:05,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:09,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:14,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:18,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:20,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:23,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:25,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:27,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:29,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:31,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:36,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:38,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:42,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:46,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:49,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:01,729 INFO L130 PetriNetUnfolder]: 60137/93727 cut-off events. [2023-08-30 20:13:01,729 INFO L131 PetriNetUnfolder]: For 3643722/3643722 co-relation queries the response was YES. [2023-08-30 20:13:03,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826087 conditions, 93727 events. 60137/93727 cut-off events. For 3643722/3643722 co-relation queries the response was YES. Maximal size of possible extension queue 3418. Compared 755122 event pairs, 4532 based on Foata normal form. 4812/92531 useless extension candidates. Maximal degree in co-relation 825933. Up to 26505 conditions per place. [2023-08-30 20:13:04,348 INFO L137 encePairwiseOnDemand]: 491/507 looper letters, 1376 selfloop transitions, 1490 changer transitions 156/3022 dead transitions. [2023-08-30 20:13:04,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 3022 transitions, 50798 flow [2023-08-30 20:13:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-30 20:13:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-30 20:13:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 12152 transitions. [2023-08-30 20:13:04,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30339799765310965 [2023-08-30 20:13:04,363 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 12152 transitions. [2023-08-30 20:13:04,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 12152 transitions. [2023-08-30 20:13:04,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:04,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 12152 transitions. [2023-08-30 20:13:04,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 153.8227848101266) internal successors, (12152), 79 states have internal predecessors, (12152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:04,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 507.0) internal successors, (40560), 80 states have internal predecessors, (40560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:04,415 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 507.0) internal successors, (40560), 80 states have internal predecessors, (40560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:04,415 INFO L175 Difference]: Start difference. First operand has 491 places, 1212 transitions, 16864 flow. Second operand 79 states and 12152 transitions. [2023-08-30 20:13:04,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 3022 transitions, 50798 flow Killed by 15