./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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 ../sv-benchmarks/c/weaver/popl20-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:48:00,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:48:00,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:48:00,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:48:00,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:48:00,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:48:00,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:48:00,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:48:00,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:48:00,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:48:00,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:48:00,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:48:00,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:48:00,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:48:00,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:48:00,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:48:00,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:48:00,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:48:00,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:48:00,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:48:00,253 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:48:00,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:48:00,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:48:00,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:48:00,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:48:00,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:48:00,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:48:00,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:48:00,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:48:00,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:48:00,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:48:00,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:48:00,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:48:00,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:48:00,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:48:00,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:48:00,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:48:00,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:48:00,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:48:00,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:48:00,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:48:00,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:48:00,275 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:48:00,310 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:48:00,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:48:00,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:48:00,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:48:00,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:48:00,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:48:00,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:48:00,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:48:00,313 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:48:00,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:48:00,314 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:48:00,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:48:00,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:48:00,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:48:00,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:48:00,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:48:00,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:48:00,315 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:48:00,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:48:00,316 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:48:00,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:48:00,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:48:00,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:48:00,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:48:00,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:48:00,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:48:00,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:48:00,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:48:00,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:48:00,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:48:00,318 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:48:00,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:48:00,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:48:00,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-07-22 21:48:00,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:48:00,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:48:00,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:48:00,576 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:48:00,576 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:48:00,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-07-22 21:48:00,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5d2e7aa6/38b98db297a14e90bc2a3ba53fa67244/FLAG8eb4f1104 [2022-07-22 21:48:01,103 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:48:01,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-07-22 21:48:01,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5d2e7aa6/38b98db297a14e90bc2a3ba53fa67244/FLAG8eb4f1104 [2022-07-22 21:48:01,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5d2e7aa6/38b98db297a14e90bc2a3ba53fa67244 [2022-07-22 21:48:01,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:48:01,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:48:01,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:48:01,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:48:01,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:48:01,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596ad88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01, skipping insertion in model container [2022-07-22 21:48:01,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:48:01,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:48:01,657 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-07-22 21:48:01,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:48:01,667 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:48:01,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-07-22 21:48:01,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:48:01,695 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:48:01,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01 WrapperNode [2022-07-22 21:48:01,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:48:01,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:48:01,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:48:01,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:48:01,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,731 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-07-22 21:48:01,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:48:01,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:48:01,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:48:01,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:48:01,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:48:01,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:48:01,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:48:01,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:48:01,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (1/1) ... [2022-07-22 21:48:01,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:48:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:01,796 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) [2022-07-22 21:48:01,804 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 [2022-07-22 21:48:01,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:48:01,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:48:01,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:48:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:48:01,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:48:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:48:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:48:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:48:01,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:48:01,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:48:01,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:48:01,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:48:01,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:48:01,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:48:01,839 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:48:01,933 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:48:01,935 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:48:02,145 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:48:02,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:48:02,183 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:48:02,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:02 BoogieIcfgContainer [2022-07-22 21:48:02,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:48:02,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:48:02,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:48:02,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:48:02,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:48:01" (1/3) ... [2022-07-22 21:48:02,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e21cbaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:02, skipping insertion in model container [2022-07-22 21:48:02,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:01" (2/3) ... [2022-07-22 21:48:02,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e21cbaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:02, skipping insertion in model container [2022-07-22 21:48:02,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:02" (3/3) ... [2022-07-22 21:48:02,200 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-07-22 21:48:02,205 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:48:02,213 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:48:02,213 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:48:02,213 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:48:02,286 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:48:02,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-07-22 21:48:02,359 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-22 21:48:02,360 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:48:02,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-07-22 21:48:02,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-07-22 21:48:02,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-07-22 21:48:02,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:48:02,403 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@740a632c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@791209b [2022-07-22 21:48:02,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:48:02,442 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-07-22 21:48:02,443 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:48:02,443 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:02,444 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-22 21:48:02,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2022-07-22 21:48:02,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:02,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407596738] [2022-07-22 21:48:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:02,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:02,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407596738] [2022-07-22 21:48:02,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407596738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:02,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:02,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:48:02,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033679720] [2022-07-22 21:48:02,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:02,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:48:02,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:48:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:48:02,887 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-22 21:48:02,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:02,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:02,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-22 21:48:02,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:03,001 INFO L129 PetriNetUnfolder]: 8/110 cut-off events. [2022-07-22 21:48:03,002 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-22 21:48:03,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 110 events. 8/110 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 1 based on Foata normal form. 15/117 useless extension candidates. Maximal degree in co-relation 62. Up to 18 conditions per place. [2022-07-22 21:48:03,004 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 15 selfloop transitions, 2 changer transitions 8/80 dead transitions. [2022-07-22 21:48:03,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 231 flow [2022-07-22 21:48:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:48:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:48:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2022-07-22 21:48:03,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8029556650246306 [2022-07-22 21:48:03,019 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2022-07-22 21:48:03,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2022-07-22 21:48:03,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:03,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2022-07-22 21:48:03,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,034 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,036 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 7 states and 489 transitions. [2022-07-22 21:48:03,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 231 flow [2022-07-22 21:48:03,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 217 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:48:03,042 INFO L242 Difference]: Finished difference. Result has 82 places, 71 transitions, 162 flow [2022-07-22 21:48:03,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=82, PETRI_TRANSITIONS=71} [2022-07-22 21:48:03,047 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-07-22 21:48:03,047 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 71 transitions, 162 flow [2022-07-22 21:48:03,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,048 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:03,048 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:03,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:48:03,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2080326486, now seen corresponding path program 1 times [2022-07-22 21:48:03,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300776193] [2022-07-22 21:48:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:03,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:03,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:03,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300776193] [2022-07-22 21:48:03,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300776193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:03,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:03,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:48:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463864355] [2022-07-22 21:48:03,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:03,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:48:03,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:03,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:48:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:48:03,177 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-22 21:48:03,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 71 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:03,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-22 21:48:03,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:03,277 INFO L129 PetriNetUnfolder]: 74/272 cut-off events. [2022-07-22 21:48:03,277 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-22 21:48:03,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 272 events. 74/272 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1161 event pairs, 22 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 468. Up to 95 conditions per place. [2022-07-22 21:48:03,280 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 31 selfloop transitions, 7 changer transitions 4/96 dead transitions. [2022-07-22 21:48:03,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 305 flow [2022-07-22 21:48:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:48:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:48:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2022-07-22 21:48:03,283 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482758620689655 [2022-07-22 21:48:03,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2022-07-22 21:48:03,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2022-07-22 21:48:03,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:03,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2022-07-22 21:48:03,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,287 INFO L186 Difference]: Start difference. First operand has 82 places, 71 transitions, 162 flow. Second operand 5 states and 369 transitions. [2022-07-22 21:48:03,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 305 flow [2022-07-22 21:48:03,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 299 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:48:03,290 INFO L242 Difference]: Finished difference. Result has 80 places, 77 transitions, 207 flow [2022-07-22 21:48:03,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2022-07-22 21:48:03,291 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-07-22 21:48:03,291 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 207 flow [2022-07-22 21:48:03,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,292 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:03,292 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:03,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:48:03,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1370932692, now seen corresponding path program 2 times [2022-07-22 21:48:03,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:03,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60408670] [2022-07-22 21:48:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:03,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:03,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60408670] [2022-07-22 21:48:03,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60408670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:03,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11748528] [2022-07-22 21:48:03,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:48:03,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:03,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:03,407 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) [2022-07-22 21:48:03,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:48:03,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:48:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:03,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:48:03,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:03,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:48:03,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11748528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:03,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:48:03,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-22 21:48:03,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335330036] [2022-07-22 21:48:03,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:03,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:48:03,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:03,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:48:03,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:48:03,617 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-07-22 21:48:03,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:03,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-07-22 21:48:03,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:03,692 INFO L129 PetriNetUnfolder]: 64/245 cut-off events. [2022-07-22 21:48:03,692 INFO L130 PetriNetUnfolder]: For 75/81 co-relation queries the response was YES. [2022-07-22 21:48:03,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 245 events. 64/245 cut-off events. For 75/81 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1064 event pairs, 19 based on Foata normal form. 7/239 useless extension candidates. Maximal degree in co-relation 365. Up to 74 conditions per place. [2022-07-22 21:48:03,695 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 23 selfloop transitions, 7 changer transitions 3/92 dead transitions. [2022-07-22 21:48:03,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 92 transitions, 329 flow [2022-07-22 21:48:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:48:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:48:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 302 transitions. [2022-07-22 21:48:03,697 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.867816091954023 [2022-07-22 21:48:03,697 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 302 transitions. [2022-07-22 21:48:03,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 302 transitions. [2022-07-22 21:48:03,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:03,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 302 transitions. [2022-07-22 21:48:03,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,700 INFO L186 Difference]: Start difference. First operand has 80 places, 77 transitions, 207 flow. Second operand 4 states and 302 transitions. [2022-07-22 21:48:03,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 92 transitions, 329 flow [2022-07-22 21:48:03,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:48:03,704 INFO L242 Difference]: Finished difference. Result has 86 places, 81 transitions, 263 flow [2022-07-22 21:48:03,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2022-07-22 21:48:03,705 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2022-07-22 21:48:03,705 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 263 flow [2022-07-22 21:48:03,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:03,706 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:03,706 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:03,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:03,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:03,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1132170860, now seen corresponding path program 3 times [2022-07-22 21:48:03,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669417101] [2022-07-22 21:48:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:04,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:04,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669417101] [2022-07-22 21:48:04,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669417101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:04,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:04,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:48:04,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309753806] [2022-07-22 21:48:04,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:04,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:48:04,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:04,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:48:04,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:48:04,028 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-22 21:48:04,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:04,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-22 21:48:04,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:04,158 INFO L129 PetriNetUnfolder]: 127/424 cut-off events. [2022-07-22 21:48:04,158 INFO L130 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2022-07-22 21:48:04,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 424 events. 127/424 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2139 event pairs, 52 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 752. Up to 125 conditions per place. [2022-07-22 21:48:04,162 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 4/104 dead transitions. [2022-07-22 21:48:04,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 104 transitions, 460 flow [2022-07-22 21:48:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:48:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:48:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-07-22 21:48:04,163 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-07-22 21:48:04,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-07-22 21:48:04,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-07-22 21:48:04,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:04,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-07-22 21:48:04,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,166 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,167 INFO L186 Difference]: Start difference. First operand has 86 places, 81 transitions, 263 flow. Second operand 6 states and 429 transitions. [2022-07-22 21:48:04,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 104 transitions, 460 flow [2022-07-22 21:48:04,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 452 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-22 21:48:04,171 INFO L242 Difference]: Finished difference. Result has 94 places, 83 transitions, 305 flow [2022-07-22 21:48:04,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2022-07-22 21:48:04,174 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 17 predicate places. [2022-07-22 21:48:04,175 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 305 flow [2022-07-22 21:48:04,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:04,176 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:04,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:48:04,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:04,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1391320060, now seen corresponding path program 4 times [2022-07-22 21:48:04,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:04,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714064940] [2022-07-22 21:48:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:04,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:04,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714064940] [2022-07-22 21:48:04,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714064940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:04,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903725373] [2022-07-22 21:48:04,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:48:04,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:04,287 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) [2022-07-22 21:48:04,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:48:04,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:48:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:48:04,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:04,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:04,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903725373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:04,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:04,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-22 21:48:04,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614150014] [2022-07-22 21:48:04,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:04,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:48:04,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:48:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:48:04,577 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-22 21:48:04,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:04,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-22 21:48:04,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:04,848 INFO L129 PetriNetUnfolder]: 209/644 cut-off events. [2022-07-22 21:48:04,848 INFO L130 PetriNetUnfolder]: For 775/784 co-relation queries the response was YES. [2022-07-22 21:48:04,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 644 events. 209/644 cut-off events. For 775/784 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3836 event pairs, 19 based on Foata normal form. 8/640 useless extension candidates. Maximal degree in co-relation 1171. Up to 100 conditions per place. [2022-07-22 21:48:04,855 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 53 selfloop transitions, 36 changer transitions 10/153 dead transitions. [2022-07-22 21:48:04,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 153 transitions, 848 flow [2022-07-22 21:48:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:48:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:48:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 736 transitions. [2022-07-22 21:48:04,859 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459770114942529 [2022-07-22 21:48:04,860 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 736 transitions. [2022-07-22 21:48:04,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 736 transitions. [2022-07-22 21:48:04,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:04,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 736 transitions. [2022-07-22 21:48:04,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,864 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,864 INFO L186 Difference]: Start difference. First operand has 94 places, 83 transitions, 305 flow. Second operand 10 states and 736 transitions. [2022-07-22 21:48:04,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 153 transitions, 848 flow [2022-07-22 21:48:04,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 153 transitions, 817 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-07-22 21:48:04,872 INFO L242 Difference]: Finished difference. Result has 108 places, 107 transitions, 610 flow [2022-07-22 21:48:04,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=610, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2022-07-22 21:48:04,875 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 31 predicate places. [2022-07-22 21:48:04,875 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 610 flow [2022-07-22 21:48:04,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:04,876 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:04,876 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:04,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:05,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:05,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2053154838, now seen corresponding path program 5 times [2022-07-22 21:48:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:05,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61585402] [2022-07-22 21:48:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:05,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:05,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61585402] [2022-07-22 21:48:05,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61585402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:05,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:05,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:48:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900280249] [2022-07-22 21:48:05,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:05,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:48:05,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:48:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:48:05,228 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-22 21:48:05,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:05,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-22 21:48:05,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:05,396 INFO L129 PetriNetUnfolder]: 207/624 cut-off events. [2022-07-22 21:48:05,396 INFO L130 PetriNetUnfolder]: For 1956/1960 co-relation queries the response was YES. [2022-07-22 21:48:05,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 624 events. 207/624 cut-off events. For 1956/1960 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3659 event pairs, 81 based on Foata normal form. 8/621 useless extension candidates. Maximal degree in co-relation 1629. Up to 229 conditions per place. [2022-07-22 21:48:05,402 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 47 selfloop transitions, 27 changer transitions 7/135 dead transitions. [2022-07-22 21:48:05,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 946 flow [2022-07-22 21:48:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:48:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:48:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 442 transitions. [2022-07-22 21:48:05,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8467432950191571 [2022-07-22 21:48:05,404 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 442 transitions. [2022-07-22 21:48:05,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 442 transitions. [2022-07-22 21:48:05,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:05,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 442 transitions. [2022-07-22 21:48:05,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,407 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,407 INFO L186 Difference]: Start difference. First operand has 108 places, 107 transitions, 610 flow. Second operand 6 states and 442 transitions. [2022-07-22 21:48:05,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 946 flow [2022-07-22 21:48:05,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 135 transitions, 920 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-07-22 21:48:05,417 INFO L242 Difference]: Finished difference. Result has 115 places, 111 transitions, 710 flow [2022-07-22 21:48:05,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=710, PETRI_PLACES=115, PETRI_TRANSITIONS=111} [2022-07-22 21:48:05,418 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2022-07-22 21:48:05,418 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 111 transitions, 710 flow [2022-07-22 21:48:05,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,418 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:05,418 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:05,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:48:05,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1438588188, now seen corresponding path program 1 times [2022-07-22 21:48:05,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:05,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777198873] [2022-07-22 21:48:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:05,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:05,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777198873] [2022-07-22 21:48:05,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777198873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:05,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381381690] [2022-07-22 21:48:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:05,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:05,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:05,526 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) [2022-07-22 21:48:05,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:48:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 21:48:05,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:48:05,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:48:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381381690] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:05,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:05,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2022-07-22 21:48:05,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830078183] [2022-07-22 21:48:05,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:05,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:48:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:05,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:48:05,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:48:05,810 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:05,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 111 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:05,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:05,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:05,971 INFO L129 PetriNetUnfolder]: 108/637 cut-off events. [2022-07-22 21:48:05,971 INFO L130 PetriNetUnfolder]: For 1574/1604 co-relation queries the response was YES. [2022-07-22 21:48:05,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 637 events. 108/637 cut-off events. For 1574/1604 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4282 event pairs, 18 based on Foata normal form. 12/639 useless extension candidates. Maximal degree in co-relation 1476. Up to 88 conditions per place. [2022-07-22 21:48:05,977 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 23 selfloop transitions, 7 changer transitions 4/126 dead transitions. [2022-07-22 21:48:05,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 818 flow [2022-07-22 21:48:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:48:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:48:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2022-07-22 21:48:05,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2022-07-22 21:48:05,980 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2022-07-22 21:48:05,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2022-07-22 21:48:05,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:05,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2022-07-22 21:48:05,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,984 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,984 INFO L186 Difference]: Start difference. First operand has 115 places, 111 transitions, 710 flow. Second operand 7 states and 476 transitions. [2022-07-22 21:48:05,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 818 flow [2022-07-22 21:48:05,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 126 transitions, 755 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-22 21:48:05,995 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 691 flow [2022-07-22 21:48:05,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=691, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-07-22 21:48:05,996 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-07-22 21:48:05,996 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 691 flow [2022-07-22 21:48:05,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:05,997 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:05,997 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:06,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:06,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:06,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:06,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:06,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2121607920, now seen corresponding path program 2 times [2022-07-22 21:48:06,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:06,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272019202] [2022-07-22 21:48:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272019202] [2022-07-22 21:48:06,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272019202] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812288153] [2022-07-22 21:48:06,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:48:06,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:06,380 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) [2022-07-22 21:48:06,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:48:06,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:48:06,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:06,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:48:06,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:06,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:06,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812288153] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:06,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:48:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631396502] [2022-07-22 21:48:06,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:06,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:48:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:48:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:48:06,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:06,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 691 flow. Second operand has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:06,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:06,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:06,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:09,921 INFO L129 PetriNetUnfolder]: 883/2531 cut-off events. [2022-07-22 21:48:09,921 INFO L130 PetriNetUnfolder]: For 6718/6737 co-relation queries the response was YES. [2022-07-22 21:48:09,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8330 conditions, 2531 events. 883/2531 cut-off events. For 6718/6737 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19769 event pairs, 62 based on Foata normal form. 32/2548 useless extension candidates. Maximal degree in co-relation 8273. Up to 294 conditions per place. [2022-07-22 21:48:09,944 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 173 selfloop transitions, 210 changer transitions 24/461 dead transitions. [2022-07-22 21:48:09,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 461 transitions, 3794 flow [2022-07-22 21:48:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-22 21:48:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-22 21:48:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4883 transitions. [2022-07-22 21:48:09,957 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7795338441890166 [2022-07-22 21:48:09,957 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4883 transitions. [2022-07-22 21:48:09,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4883 transitions. [2022-07-22 21:48:09,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:09,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4883 transitions. [2022-07-22 21:48:09,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 67.81944444444444) internal successors, (4883), 72 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:09,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 87.0) internal successors, (6351), 73 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:09,984 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 87.0) internal successors, (6351), 73 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:09,985 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 691 flow. Second operand 72 states and 4883 transitions. [2022-07-22 21:48:09,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 461 transitions, 3794 flow [2022-07-22 21:48:10,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 461 transitions, 3726 flow, removed 33 selfloop flow, removed 3 redundant places. [2022-07-22 21:48:10,016 INFO L242 Difference]: Finished difference. Result has 218 places, 299 transitions, 2745 flow [2022-07-22 21:48:10,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2745, PETRI_PLACES=218, PETRI_TRANSITIONS=299} [2022-07-22 21:48:10,019 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 141 predicate places. [2022-07-22 21:48:10,019 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 299 transitions, 2745 flow [2022-07-22 21:48:10,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:10,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:10,020 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:10,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:10,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:10,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:10,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1078465688, now seen corresponding path program 3 times [2022-07-22 21:48:10,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:10,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823529570] [2022-07-22 21:48:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:10,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:10,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823529570] [2022-07-22 21:48:10,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823529570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417712960] [2022-07-22 21:48:10,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:48:10,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:10,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:10,384 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) [2022-07-22 21:48:10,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:48:10,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:48:10,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:48:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:10,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:10,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417712960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:10,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:10,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-22 21:48:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999820630] [2022-07-22 21:48:10,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:10,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:48:10,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:48:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:48:10,777 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:10,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 299 transitions, 2745 flow. Second operand has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:10,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:10,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:10,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:12,673 INFO L129 PetriNetUnfolder]: 1220/3244 cut-off events. [2022-07-22 21:48:12,673 INFO L130 PetriNetUnfolder]: For 34165/34183 co-relation queries the response was YES. [2022-07-22 21:48:12,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17105 conditions, 3244 events. 1220/3244 cut-off events. For 34165/34183 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 26181 event pairs, 58 based on Foata normal form. 36/3258 useless extension candidates. Maximal degree in co-relation 15734. Up to 438 conditions per place. [2022-07-22 21:48:12,727 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 171 selfloop transitions, 431 changer transitions 12/668 dead transitions. [2022-07-22 21:48:12,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 668 transitions, 8330 flow [2022-07-22 21:48:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-22 21:48:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-22 21:48:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3176 transitions. [2022-07-22 21:48:12,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7767180239667401 [2022-07-22 21:48:12,734 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3176 transitions. [2022-07-22 21:48:12,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3176 transitions. [2022-07-22 21:48:12,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:12,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3176 transitions. [2022-07-22 21:48:12,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.57446808510639) internal successors, (3176), 47 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:12,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:12,754 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:12,754 INFO L186 Difference]: Start difference. First operand has 218 places, 299 transitions, 2745 flow. Second operand 47 states and 3176 transitions. [2022-07-22 21:48:12,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 668 transitions, 8330 flow [2022-07-22 21:48:12,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 668 transitions, 7510 flow, removed 346 selfloop flow, removed 6 redundant places. [2022-07-22 21:48:12,933 INFO L242 Difference]: Finished difference. Result has 284 places, 547 transitions, 6270 flow [2022-07-22 21:48:12,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=6270, PETRI_PLACES=284, PETRI_TRANSITIONS=547} [2022-07-22 21:48:12,934 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 207 predicate places. [2022-07-22 21:48:12,934 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 547 transitions, 6270 flow [2022-07-22 21:48:12,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:12,935 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:12,935 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:12,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:13,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:13,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash -599658512, now seen corresponding path program 4 times [2022-07-22 21:48:13,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:13,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827399592] [2022-07-22 21:48:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:13,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:13,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827399592] [2022-07-22 21:48:13,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827399592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:13,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114689274] [2022-07-22 21:48:13,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:48:13,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:13,296 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) [2022-07-22 21:48:13,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:48:13,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:48:13,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:48:13,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:13,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:13,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114689274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:13,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:13,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-22 21:48:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989407010] [2022-07-22 21:48:13,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:13,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:48:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:48:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:48:13,625 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:13,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 547 transitions, 6270 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:13,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:13,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:13,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:15,498 INFO L129 PetriNetUnfolder]: 1238/3407 cut-off events. [2022-07-22 21:48:15,498 INFO L130 PetriNetUnfolder]: For 62138/62174 co-relation queries the response was YES. [2022-07-22 21:48:15,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20630 conditions, 3407 events. 1238/3407 cut-off events. For 62138/62174 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 28274 event pairs, 77 based on Foata normal form. 15/3388 useless extension candidates. Maximal degree in co-relation 19180. Up to 544 conditions per place. [2022-07-22 21:48:15,546 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 341 selfloop transitions, 279 changer transitions 42/716 dead transitions. [2022-07-22 21:48:15,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 716 transitions, 10316 flow [2022-07-22 21:48:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 21:48:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-22 21:48:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2574 transitions. [2022-07-22 21:48:15,551 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.778584392014519 [2022-07-22 21:48:15,551 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2574 transitions. [2022-07-22 21:48:15,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2574 transitions. [2022-07-22 21:48:15,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:15,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2574 transitions. [2022-07-22 21:48:15,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 67.73684210526316) internal successors, (2574), 38 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:15,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:15,562 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:15,563 INFO L186 Difference]: Start difference. First operand has 284 places, 547 transitions, 6270 flow. Second operand 38 states and 2574 transitions. [2022-07-22 21:48:15,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 716 transitions, 10316 flow [2022-07-22 21:48:15,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 716 transitions, 9327 flow, removed 350 selfloop flow, removed 2 redundant places. [2022-07-22 21:48:15,886 INFO L242 Difference]: Finished difference. Result has 332 places, 584 transitions, 6655 flow [2022-07-22 21:48:15,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=5504, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6655, PETRI_PLACES=332, PETRI_TRANSITIONS=584} [2022-07-22 21:48:15,888 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 255 predicate places. [2022-07-22 21:48:15,888 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 584 transitions, 6655 flow [2022-07-22 21:48:15,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:15,888 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:15,889 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:15,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:16,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:16,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:16,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash -907958500, now seen corresponding path program 5 times [2022-07-22 21:48:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:16,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662433225] [2022-07-22 21:48:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:16,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:16,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662433225] [2022-07-22 21:48:16,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662433225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:16,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696092003] [2022-07-22 21:48:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:48:16,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:16,234 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) [2022-07-22 21:48:16,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:48:16,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:48:16,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:16,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 21:48:16,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:16,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:16,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696092003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:16,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:16,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2022-07-22 21:48:16,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997722385] [2022-07-22 21:48:16,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:16,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:48:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:48:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:48:16,816 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:16,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 584 transitions, 6655 flow. Second operand has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:16,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:16,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:16,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:18,537 INFO L129 PetriNetUnfolder]: 1514/4097 cut-off events. [2022-07-22 21:48:18,537 INFO L130 PetriNetUnfolder]: For 81650/81663 co-relation queries the response was YES. [2022-07-22 21:48:18,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25293 conditions, 4097 events. 1514/4097 cut-off events. For 81650/81663 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 34473 event pairs, 121 based on Foata normal form. 10/4100 useless extension candidates. Maximal degree in co-relation 24928. Up to 798 conditions per place. [2022-07-22 21:48:18,597 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 365 selfloop transitions, 429 changer transitions 5/853 dead transitions. [2022-07-22 21:48:18,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 853 transitions, 11707 flow [2022-07-22 21:48:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 21:48:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-22 21:48:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1887 transitions. [2022-07-22 21:48:18,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7746305418719212 [2022-07-22 21:48:18,601 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1887 transitions. [2022-07-22 21:48:18,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1887 transitions. [2022-07-22 21:48:18,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:18,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1887 transitions. [2022-07-22 21:48:18,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 67.39285714285714) internal successors, (1887), 28 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:18,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 87.0) internal successors, (2523), 29 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:18,610 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 87.0) internal successors, (2523), 29 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:18,611 INFO L186 Difference]: Start difference. First operand has 332 places, 584 transitions, 6655 flow. Second operand 28 states and 1887 transitions. [2022-07-22 21:48:18,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 853 transitions, 11707 flow [2022-07-22 21:48:19,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 853 transitions, 11412 flow, removed 109 selfloop flow, removed 6 redundant places. [2022-07-22 21:48:19,088 INFO L242 Difference]: Finished difference. Result has 357 places, 746 transitions, 10190 flow [2022-07-22 21:48:19,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10190, PETRI_PLACES=357, PETRI_TRANSITIONS=746} [2022-07-22 21:48:19,089 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 280 predicate places. [2022-07-22 21:48:19,090 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 746 transitions, 10190 flow [2022-07-22 21:48:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:19,091 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:19,091 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:19,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 21:48:19,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:19,301 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash 996319846, now seen corresponding path program 6 times [2022-07-22 21:48:19,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:19,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314202535] [2022-07-22 21:48:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:19,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:19,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:19,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314202535] [2022-07-22 21:48:19,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314202535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:19,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272756828] [2022-07-22 21:48:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:48:19,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:19,450 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) [2022-07-22 21:48:19,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:48:19,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 21:48:19,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:19,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:48:19,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:19,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:19,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272756828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:19,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:19,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-22 21:48:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877098340] [2022-07-22 21:48:19,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:19,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:48:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:19,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:48:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:48:19,836 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:19,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 746 transitions, 10190 flow. Second operand has 20 states, 20 states have (on average 65.8) internal successors, (1316), 20 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:19,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:19,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:19,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:24,570 INFO L129 PetriNetUnfolder]: 2382/6414 cut-off events. [2022-07-22 21:48:24,570 INFO L130 PetriNetUnfolder]: For 156511/156537 co-relation queries the response was YES. [2022-07-22 21:48:24,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43397 conditions, 6414 events. 2382/6414 cut-off events. For 156511/156537 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 59614 event pairs, 33 based on Foata normal form. 32/6420 useless extension candidates. Maximal degree in co-relation 42984. Up to 750 conditions per place. [2022-07-22 21:48:24,672 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 289 selfloop transitions, 1096 changer transitions 5/1444 dead transitions. [2022-07-22 21:48:24,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1444 transitions, 24022 flow [2022-07-22 21:48:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-22 21:48:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-07-22 21:48:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7224 transitions. [2022-07-22 21:48:24,682 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2022-07-22 21:48:24,682 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7224 transitions. [2022-07-22 21:48:24,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7224 transitions. [2022-07-22 21:48:24,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:24,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7224 transitions. [2022-07-22 21:48:24,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.88888888888889) internal successors, (7224), 108 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) [2022-07-22 21:48:24,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:24,719 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:24,719 INFO L186 Difference]: Start difference. First operand has 357 places, 746 transitions, 10190 flow. Second operand 108 states and 7224 transitions. [2022-07-22 21:48:24,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1444 transitions, 24022 flow [2022-07-22 21:48:25,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1444 transitions, 22667 flow, removed 629 selfloop flow, removed 7 redundant places. [2022-07-22 21:48:25,903 INFO L242 Difference]: Finished difference. Result has 487 places, 1261 transitions, 20726 flow [2022-07-22 21:48:25,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=20726, PETRI_PLACES=487, PETRI_TRANSITIONS=1261} [2022-07-22 21:48:25,905 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 410 predicate places. [2022-07-22 21:48:25,906 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1261 transitions, 20726 flow [2022-07-22 21:48:25,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.8) internal successors, (1316), 20 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:25,906 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:25,906 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:25,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:26,119 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,SelfDestructingSolverStorable11 [2022-07-22 21:48:26,119 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash 356696528, now seen corresponding path program 7 times [2022-07-22 21:48:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:26,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921490445] [2022-07-22 21:48:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:26,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:26,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921490445] [2022-07-22 21:48:26,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921490445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14558213] [2022-07-22 21:48:26,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:48:26,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:26,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:26,282 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) [2022-07-22 21:48:26,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:48:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:26,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:48:26,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:26,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:26,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14558213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:26,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:26,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:48:26,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890933328] [2022-07-22 21:48:26,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:26,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:48:26,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:48:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:48:26,629 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:26,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1261 transitions, 20726 flow. Second operand has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:26,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:26,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:26,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:31,598 INFO L129 PetriNetUnfolder]: 3289/8637 cut-off events. [2022-07-22 21:48:31,598 INFO L130 PetriNetUnfolder]: For 260282/260321 co-relation queries the response was YES. [2022-07-22 21:48:31,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66445 conditions, 8637 events. 3289/8637 cut-off events. For 260282/260321 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 84543 event pairs, 120 based on Foata normal form. 51/8596 useless extension candidates. Maximal degree in co-relation 66002. Up to 1078 conditions per place. [2022-07-22 21:48:31,826 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 352 selfloop transitions, 1545 changer transitions 3/1954 dead transitions. [2022-07-22 21:48:31,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1954 transitions, 36611 flow [2022-07-22 21:48:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-22 21:48:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-22 21:48:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4171 transitions. [2022-07-22 21:48:31,842 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7732665925101965 [2022-07-22 21:48:31,843 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4171 transitions. [2022-07-22 21:48:31,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4171 transitions. [2022-07-22 21:48:32,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:32,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4171 transitions. [2022-07-22 21:48:32,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.2741935483871) internal successors, (4171), 62 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:32,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:32,056 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:32,056 INFO L186 Difference]: Start difference. First operand has 487 places, 1261 transitions, 20726 flow. Second operand 62 states and 4171 transitions. [2022-07-22 21:48:32,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1954 transitions, 36611 flow [2022-07-22 21:48:33,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1954 transitions, 34119 flow, removed 1110 selfloop flow, removed 8 redundant places. [2022-07-22 21:48:34,011 INFO L242 Difference]: Finished difference. Result has 569 places, 1846 transitions, 34105 flow [2022-07-22 21:48:34,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=19253, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=34105, PETRI_PLACES=569, PETRI_TRANSITIONS=1846} [2022-07-22 21:48:34,013 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 492 predicate places. [2022-07-22 21:48:34,013 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1846 transitions, 34105 flow [2022-07-22 21:48:34,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:34,013 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:34,014 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:34,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:34,214 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,SelfDestructingSolverStorable12 [2022-07-22 21:48:34,214 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash 768637718, now seen corresponding path program 8 times [2022-07-22 21:48:34,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:34,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128413522] [2022-07-22 21:48:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:34,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:34,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128413522] [2022-07-22 21:48:34,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128413522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:34,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204501537] [2022-07-22 21:48:34,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:48:34,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:34,346 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) [2022-07-22 21:48:34,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:48:34,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:48:34,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:34,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:48:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:34,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:34,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204501537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:34,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:34,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:48:34,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120189819] [2022-07-22 21:48:34,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:34,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:48:34,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:48:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:48:34,644 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:34,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1846 transitions, 34105 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:34,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:34,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:34,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:43,054 INFO L129 PetriNetUnfolder]: 4079/10778 cut-off events. [2022-07-22 21:48:43,054 INFO L130 PetriNetUnfolder]: For 303815/303840 co-relation queries the response was YES. [2022-07-22 21:48:43,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83501 conditions, 10778 events. 4079/10778 cut-off events. For 303815/303840 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 111162 event pairs, 86 based on Foata normal form. 31/10762 useless extension candidates. Maximal degree in co-relation 83132. Up to 1331 conditions per place. [2022-07-22 21:48:43,333 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 313 selfloop transitions, 2117 changer transitions 3/2487 dead transitions. [2022-07-22 21:48:43,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 2487 transitions, 50680 flow [2022-07-22 21:48:43,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-22 21:48:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-07-22 21:48:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2022-07-22 21:48:43,338 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2022-07-22 21:48:43,338 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2022-07-22 21:48:43,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2022-07-22 21:48:43,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:43,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2022-07-22 21:48:43,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:43,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:43,357 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:43,358 INFO L186 Difference]: Start difference. First operand has 569 places, 1846 transitions, 34105 flow. Second operand 79 states and 5263 transitions. [2022-07-22 21:48:43,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 2487 transitions, 50680 flow [2022-07-22 21:48:46,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2487 transitions, 50128 flow, removed 149 selfloop flow, removed 13 redundant places. [2022-07-22 21:48:46,657 INFO L242 Difference]: Finished difference. Result has 666 places, 2387 transitions, 50391 flow [2022-07-22 21:48:46,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=33652, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=50391, PETRI_PLACES=666, PETRI_TRANSITIONS=2387} [2022-07-22 21:48:46,659 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 589 predicate places. [2022-07-22 21:48:46,660 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 2387 transitions, 50391 flow [2022-07-22 21:48:46,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:46,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:46,660 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:46,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:46,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 21:48:46,868 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:48:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1627796726, now seen corresponding path program 9 times [2022-07-22 21:48:46,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:46,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218727101] [2022-07-22 21:48:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:46,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:46,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218727101] [2022-07-22 21:48:46,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218727101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:46,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478933801] [2022-07-22 21:48:46,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:48:46,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:46,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:46,980 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:48:46,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:48:47,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 21:48:47,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:48:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:47,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:47,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478933801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:47,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:47,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:48:47,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311835578] [2022-07-22 21:48:47,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:47,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:48:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:48:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:48:47,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:48:47,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2387 transitions, 50391 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:47,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:47,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:48:47,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:57,241 INFO L129 PetriNetUnfolder]: 4231/11248 cut-off events. [2022-07-22 21:48:57,241 INFO L130 PetriNetUnfolder]: For 366383/366409 co-relation queries the response was YES. [2022-07-22 21:48:57,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94663 conditions, 11248 events. 4231/11248 cut-off events. For 366383/366409 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 117497 event pairs, 131 based on Foata normal form. 27/11158 useless extension candidates. Maximal degree in co-relation 94392. Up to 1392 conditions per place. [2022-07-22 21:48:57,522 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 854 selfloop transitions, 1765 changer transitions 26/2699 dead transitions. [2022-07-22 21:48:57,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 2699 transitions, 61925 flow [2022-07-22 21:48:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-22 21:48:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-22 21:48:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4370 transitions. [2022-07-22 21:48:57,526 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7727674624226348 [2022-07-22 21:48:57,526 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4370 transitions. [2022-07-22 21:48:57,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4370 transitions. [2022-07-22 21:48:57,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:57,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4370 transitions. [2022-07-22 21:48:57,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 67.23076923076923) internal successors, (4370), 65 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:57,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:57,541 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:57,541 INFO L186 Difference]: Start difference. First operand has 666 places, 2387 transitions, 50391 flow. Second operand 65 states and 4370 transitions. [2022-07-22 21:48:57,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 2699 transitions, 61925 flow [2022-07-22 21:49:02,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 2699 transitions, 61349 flow, removed 155 selfloop flow, removed 18 redundant places. [2022-07-22 21:49:02,262 INFO L242 Difference]: Finished difference. Result has 724 places, 2545 transitions, 58046 flow [2022-07-22 21:49:02,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49721, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=58046, PETRI_PLACES=724, PETRI_TRANSITIONS=2545} [2022-07-22 21:49:02,266 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 647 predicate places. [2022-07-22 21:49:02,266 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 2545 transitions, 58046 flow [2022-07-22 21:49:02,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:02,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:02,267 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:02,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 21:49:02,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 21:49:02,491 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:49:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:02,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1906991496, now seen corresponding path program 10 times [2022-07-22 21:49:02,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:02,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26821094] [2022-07-22 21:49:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:02,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:02,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26821094] [2022-07-22 21:49:02,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26821094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042154906] [2022-07-22 21:49:02,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:49:02,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:02,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:02,637 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:02,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:49:02,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:49:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:49:02,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:02,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:02,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042154906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:02,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:02,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-22 21:49:02,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258051665] [2022-07-22 21:49:02,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:02,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:49:02,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:02,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:49:02,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:49:02,968 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:49:02,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 2545 transitions, 58046 flow. Second operand has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:02,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:02,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:49:02,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:18,706 INFO L129 PetriNetUnfolder]: 5636/14703 cut-off events. [2022-07-22 21:49:18,706 INFO L130 PetriNetUnfolder]: For 615022/615058 co-relation queries the response was YES. [2022-07-22 21:49:19,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138398 conditions, 14703 events. 5636/14703 cut-off events. For 615022/615058 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 159622 event pairs, 579 based on Foata normal form. 52/14586 useless extension candidates. Maximal degree in co-relation 138123. Up to 2145 conditions per place. [2022-07-22 21:49:19,540 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1011 selfloop transitions, 2492 changer transitions 2/3559 dead transitions. [2022-07-22 21:49:19,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 3559 transitions, 88295 flow [2022-07-22 21:49:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-22 21:49:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-07-22 21:49:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4991 transitions. [2022-07-22 21:49:19,544 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7752407579993786 [2022-07-22 21:49:19,544 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4991 transitions. [2022-07-22 21:49:19,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4991 transitions. [2022-07-22 21:49:19,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:19,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4991 transitions. [2022-07-22 21:49:19,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 67.44594594594595) internal successors, (4991), 74 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:19,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:19,560 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:19,560 INFO L186 Difference]: Start difference. First operand has 724 places, 2545 transitions, 58046 flow. Second operand 74 states and 4991 transitions. [2022-07-22 21:49:19,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 3559 transitions, 88295 flow [2022-07-22 21:49:27,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 3559 transitions, 86706 flow, removed 413 selfloop flow, removed 25 redundant places. [2022-07-22 21:49:27,852 INFO L242 Difference]: Finished difference. Result has 793 places, 3328 transitions, 84740 flow [2022-07-22 21:49:27,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=57036, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=84740, PETRI_PLACES=793, PETRI_TRANSITIONS=3328} [2022-07-22 21:49:27,856 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 716 predicate places. [2022-07-22 21:49:27,856 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 3328 transitions, 84740 flow [2022-07-22 21:49:27,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:27,857 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:27,857 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:27,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:49:28,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 21:49:28,074 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:49:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:28,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1650327980, now seen corresponding path program 11 times [2022-07-22 21:49:28,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:28,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157782417] [2022-07-22 21:49:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:28,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:28,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:28,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157782417] [2022-07-22 21:49:28,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157782417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985922929] [2022-07-22 21:49:28,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:49:28,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:28,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:28,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:28,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:49:28,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:49:28,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:28,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:49:28,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:28,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:28,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985922929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:28,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:28,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:49:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731637135] [2022-07-22 21:49:28,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:28,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:49:28,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:49:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:49:28,503 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:49:28,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 3328 transitions, 84740 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:28,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:28,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:49:28,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:48,314 INFO L129 PetriNetUnfolder]: 6268/16422 cut-off events. [2022-07-22 21:49:48,314 INFO L130 PetriNetUnfolder]: For 868432/868481 co-relation queries the response was YES. [2022-07-22 21:49:48,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167517 conditions, 16422 events. 6268/16422 cut-off events. For 868432/868481 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 180918 event pairs, 421 based on Foata normal form. 48/16267 useless extension candidates. Maximal degree in co-relation 167157. Up to 2169 conditions per place. [2022-07-22 21:49:48,858 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 711 selfloop transitions, 3100 changer transitions 4/3869 dead transitions. [2022-07-22 21:49:48,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 3869 transitions, 105785 flow [2022-07-22 21:49:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-22 21:49:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-22 21:49:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5585 transitions. [2022-07-22 21:49:48,863 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7734385819138624 [2022-07-22 21:49:48,863 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5585 transitions. [2022-07-22 21:49:48,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5585 transitions. [2022-07-22 21:49:48,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:48,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5585 transitions. [2022-07-22 21:49:48,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.28915662650603) internal successors, (5585), 83 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:48,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:48,879 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:48,879 INFO L186 Difference]: Start difference. First operand has 793 places, 3328 transitions, 84740 flow. Second operand 83 states and 5585 transitions. [2022-07-22 21:49:48,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 875 places, 3869 transitions, 105785 flow [2022-07-22 21:50:01,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 3869 transitions, 104582 flow, removed 426 selfloop flow, removed 19 redundant places. [2022-07-22 21:50:01,439 INFO L242 Difference]: Finished difference. Result has 877 places, 3634 transitions, 102351 flow [2022-07-22 21:50:01,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=83816, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=102351, PETRI_PLACES=877, PETRI_TRANSITIONS=3634} [2022-07-22 21:50:01,442 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 800 predicate places. [2022-07-22 21:50:01,442 INFO L495 AbstractCegarLoop]: Abstraction has has 877 places, 3634 transitions, 102351 flow [2022-07-22 21:50:01,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:01,443 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:50:01,443 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:50:01,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:50:01,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:50:01,652 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:50:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:50:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash 917077054, now seen corresponding path program 12 times [2022-07-22 21:50:01,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:50:01,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551697665] [2022-07-22 21:50:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:50:01,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:50:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:50:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:50:01,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:50:01,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551697665] [2022-07-22 21:50:01,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551697665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:50:01,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237499134] [2022-07-22 21:50:01,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:50:01,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:50:01,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:50:01,789 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:50:01,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:50:01,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 21:50:01,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:50:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:50:01,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:50:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:50:01,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:50:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:50:02,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237499134] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:50:02,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:50:02,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:50:02,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531565549] [2022-07-22 21:50:02,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:50:02,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:50:02,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:50:02,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:50:02,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:50:02,102 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:50:02,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 877 places, 3634 transitions, 102351 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:02,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:50:02,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:50:02,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:50:32,833 INFO L129 PetriNetUnfolder]: 8477/22116 cut-off events. [2022-07-22 21:50:32,833 INFO L130 PetriNetUnfolder]: For 1434075/1434159 co-relation queries the response was YES. [2022-07-22 21:50:34,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244450 conditions, 22116 events. 8477/22116 cut-off events. For 1434075/1434159 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 255398 event pairs, 549 based on Foata normal form. 59/21942 useless extension candidates. Maximal degree in co-relation 243965. Up to 3110 conditions per place. [2022-07-22 21:50:34,361 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 756 selfloop transitions, 4596 changer transitions 3/5409 dead transitions. [2022-07-22 21:50:34,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 5409 transitions, 163256 flow [2022-07-22 21:50:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-07-22 21:50:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-07-22 21:50:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8664 transitions. [2022-07-22 21:50:34,367 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7660477453580902 [2022-07-22 21:50:34,367 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8664 transitions. [2022-07-22 21:50:34,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8664 transitions. [2022-07-22 21:50:34,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:50:34,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8664 transitions. [2022-07-22 21:50:34,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.64615384615385) internal successors, (8664), 130 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:34,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:34,384 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:34,384 INFO L186 Difference]: Start difference. First operand has 877 places, 3634 transitions, 102351 flow. Second operand 130 states and 8664 transitions. [2022-07-22 21:50:34,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 5409 transitions, 163256 flow [2022-07-22 21:51:00,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 975 places, 5409 transitions, 159081 flow, removed 534 selfloop flow, removed 31 redundant places. [2022-07-22 21:51:00,416 INFO L242 Difference]: Finished difference. Result has 1015 places, 5163 transitions, 157846 flow [2022-07-22 21:51:00,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=99384, PETRI_DIFFERENCE_MINUEND_PLACES=846, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=157846, PETRI_PLACES=1015, PETRI_TRANSITIONS=5163} [2022-07-22 21:51:00,420 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 938 predicate places. [2022-07-22 21:51:00,420 INFO L495 AbstractCegarLoop]: Abstraction has has 1015 places, 5163 transitions, 157846 flow [2022-07-22 21:51:00,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:00,421 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:00,421 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:00,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:00,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:00,635 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:51:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:00,636 INFO L85 PathProgramCache]: Analyzing trace with hash 641559098, now seen corresponding path program 13 times [2022-07-22 21:51:00,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:00,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492650563] [2022-07-22 21:51:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:00,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492650563] [2022-07-22 21:51:00,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492650563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438886951] [2022-07-22 21:51:00,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:51:00,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:00,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:00,736 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:51:00,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:51:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:00,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:51:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:00,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:01,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438886951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:51:01,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:51:01,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:51:01,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115997110] [2022-07-22 21:51:01,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:51:01,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:51:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:51:01,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:51:01,027 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-22 21:51:01,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1015 places, 5163 transitions, 157846 flow. Second operand has 18 states, 18 states have (on average 65.44444444444444) internal successors, (1178), 18 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:01,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:01,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-22 21:51:01,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:49,091 INFO L129 PetriNetUnfolder]: 10147/26155 cut-off events. [2022-07-22 21:51:49,092 INFO L130 PetriNetUnfolder]: For 2118904/2119006 co-relation queries the response was YES.