./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:10:59,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:10:59,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:10:59,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:10:59,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:10:59,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:10:59,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:10:59,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:10:59,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:10:59,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:10:59,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:10:59,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:10:59,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:10:59,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:10:59,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:10:59,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:10:59,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:10:59,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:10:59,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:10:59,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:10:59,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:10:59,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:10:59,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:10:59,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:10:59,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:10:59,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:10:59,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:10:59,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:10:59,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:10:59,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:10:59,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:10:59,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:10:59,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:10:59,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:10:59,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:10:59,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:10:59,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:10:59,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:10:59,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:10:59,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:10:59,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:10:59,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:10:59,252 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:10:59,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:10:59,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:10:59,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:10:59,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:10:59,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:10:59,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:10:59,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:10:59,255 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:10:59,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:10:59,256 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:10:59,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:10:59,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:10:59,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:10:59,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:10:59,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:10:59,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:10:59,258 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:10:59,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:10:59,258 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:10:59,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:10:59,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:10:59,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:10:59,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:10:59,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:10:59,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:10:59,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:10:59,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:10:59,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:10:59,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:10:59,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:10:59,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:10:59,261 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:10:59,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:10:59,261 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:10:59,261 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:10:59,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:10:59,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:10:59,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:10:59,621 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:10:59,622 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:10:59,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-31 02:11:00,832 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:11:00,998 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:11:00,999 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-31 02:11:01,008 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd92efcaa/dad027689a7a4192a36343fab7c52ff4/FLAG8fc5cf47c [2023-08-31 02:11:01,020 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd92efcaa/dad027689a7a4192a36343fab7c52ff4 [2023-08-31 02:11:01,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:11:01,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:11:01,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:11:01,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:11:01,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:11:01,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b19a99c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01, skipping insertion in model container [2023-08-31 02:11:01,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:11:01,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:11:01,220 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-31 02:11:01,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:11:01,252 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:11:01,295 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-31 02:11:01,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:11:01,323 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:11:01,325 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:11:01,331 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:11:01,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01 WrapperNode [2023-08-31 02:11:01,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:11:01,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:11:01,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:11:01,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:11:01,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,410 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 330 [2023-08-31 02:11:01,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:11:01,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:11:01,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:11:01,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:11:01,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:11:01,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:11:01,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:11:01,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:11:01,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (1/1) ... [2023-08-31 02:11:01,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:11:01,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:11:01,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 02:11:01,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 02:11:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:11:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:11:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:11:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:11:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:11:01,572 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:11:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:11:01,572 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:11:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:11:01,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:11:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 02:11:01,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 02:11:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:11:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:11:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:11:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:11:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:11:01,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:11:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:11:01,576 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:11:01,745 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:11:01,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:11:02,209 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:11:02,377 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:11:02,377 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-31 02:11:02,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:11:02 BoogieIcfgContainer [2023-08-31 02:11:02,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:11:02,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:11:02,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:11:02,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:11:02,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:11:01" (1/3) ... [2023-08-31 02:11:02,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b577609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:11:02, skipping insertion in model container [2023-08-31 02:11:02,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:11:01" (2/3) ... [2023-08-31 02:11:02,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b577609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:11:02, skipping insertion in model container [2023-08-31 02:11:02,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:11:02" (3/3) ... [2023-08-31 02:11:02,391 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-08-31 02:11:02,401 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:11:02,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:11:02,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:11:02,411 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:11:02,526 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 02:11:02,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 239 transitions, 510 flow [2023-08-31 02:11:02,679 INFO L130 PetriNetUnfolder]: 19/235 cut-off events. [2023-08-31 02:11:02,680 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:11:02,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 235 events. 19/235 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 119 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2023-08-31 02:11:02,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 239 transitions, 510 flow [2023-08-31 02:11:02,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 223 transitions, 470 flow [2023-08-31 02:11:02,701 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:11:02,718 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 223 transitions, 470 flow [2023-08-31 02:11:02,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 223 transitions, 470 flow [2023-08-31 02:11:02,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 223 transitions, 470 flow [2023-08-31 02:11:02,780 INFO L130 PetriNetUnfolder]: 19/223 cut-off events. [2023-08-31 02:11:02,780 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:11:02,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 223 events. 19/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2023-08-31 02:11:02,786 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-08-31 02:11:11,576 INFO L134 LiptonReduction]: Checked pairs total: 4193 [2023-08-31 02:11:11,576 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-31 02:11:11,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:11:11,594 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2988fc60, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:11:11,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 02:11:11,601 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2023-08-31 02:11:11,602 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:11:11,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:11:11,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:11:11,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:11:11,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:11:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash -13559017, now seen corresponding path program 1 times [2023-08-31 02:11:11,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:11:11,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089586247] [2023-08-31 02:11:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:11:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:11:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:11:12,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:11:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089586247] [2023-08-31 02:11:12,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089586247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:11:12,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:11:12,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:11:12,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546185448] [2023-08-31 02:11:12,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:11:12,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:11:12,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:11:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:11:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:11:12,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 458 [2023-08-31 02:11:12,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:12,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:11:12,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 458 [2023-08-31 02:11:12,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:11:13,329 INFO L130 PetriNetUnfolder]: 4038/5324 cut-off events. [2023-08-31 02:11:13,330 INFO L131 PetriNetUnfolder]: For 385/385 co-relation queries the response was YES. [2023-08-31 02:11:13,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10975 conditions, 5324 events. 4038/5324 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23782 event pairs, 572 based on Foata normal form. 0/3871 useless extension candidates. Maximal degree in co-relation 8632. Up to 2390 conditions per place. [2023-08-31 02:11:13,374 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 72 selfloop transitions, 6 changer transitions 9/91 dead transitions. [2023-08-31 02:11:13,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 91 transitions, 413 flow [2023-08-31 02:11:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:11:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:11:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1319 transitions. [2023-08-31 02:11:13,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799854439592431 [2023-08-31 02:11:13,398 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1319 transitions. [2023-08-31 02:11:13,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1319 transitions. [2023-08-31 02:11:13,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:11:13,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1319 transitions. [2023-08-31 02:11:13,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.83333333333334) internal successors, (1319), 6 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:13,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:13,423 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:13,424 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 6 states and 1319 transitions. [2023-08-31 02:11:13,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 91 transitions, 413 flow [2023-08-31 02:11:13,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 91 transitions, 375 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 02:11:13,443 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 121 flow [2023-08-31 02:11:13,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-31 02:11:13,449 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-31 02:11:13,452 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 121 flow [2023-08-31 02:11:13,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:13,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:11:13,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:11:13,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:11:13,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:11:13,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:11:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1324692751, now seen corresponding path program 1 times [2023-08-31 02:11:13,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:11:13,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633581939] [2023-08-31 02:11:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:11:13,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:11:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:11:13,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:11:13,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633581939] [2023-08-31 02:11:13,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633581939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:11:13,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:11:13,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:11:13,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140465347] [2023-08-31 02:11:13,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:11:13,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:11:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:11:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:11:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:11:13,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 458 [2023-08-31 02:11:13,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:13,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:11:13,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 458 [2023-08-31 02:11:13,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:11:14,259 INFO L130 PetriNetUnfolder]: 3465/4770 cut-off events. [2023-08-31 02:11:14,260 INFO L131 PetriNetUnfolder]: For 1569/1795 co-relation queries the response was YES. [2023-08-31 02:11:14,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 4770 events. 3465/4770 cut-off events. For 1569/1795 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23731 event pairs, 2333 based on Foata normal form. 312/3898 useless extension candidates. Maximal degree in co-relation 6367. Up to 4194 conditions per place. [2023-08-31 02:11:14,293 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 32 selfloop transitions, 2 changer transitions 21/63 dead transitions. [2023-08-31 02:11:14,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 284 flow [2023-08-31 02:11:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:11:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:11:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 859 transitions. [2023-08-31 02:11:14,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46888646288209607 [2023-08-31 02:11:14,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 859 transitions. [2023-08-31 02:11:14,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 859 transitions. [2023-08-31 02:11:14,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:11:14,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 859 transitions. [2023-08-31 02:11:14,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:14,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:14,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:14,304 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 121 flow. Second operand 4 states and 859 transitions. [2023-08-31 02:11:14,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 284 flow [2023-08-31 02:11:14,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 02:11:14,309 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2023-08-31 02:11:14,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-31 02:11:14,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-31 02:11:14,311 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2023-08-31 02:11:14,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:14,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:11:14,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:11:14,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:11:14,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:11:14,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:11:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1032841996, now seen corresponding path program 1 times [2023-08-31 02:11:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:11:14,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930458037] [2023-08-31 02:11:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:11:14,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:11:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:11:14,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:11:14,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930458037] [2023-08-31 02:11:14,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930458037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:11:14,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:11:14,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:11:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314839280] [2023-08-31 02:11:14,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:11:14,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:11:14,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:11:14,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:11:14,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:11:14,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 458 [2023-08-31 02:11:14,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:14,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:11:14,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 458 [2023-08-31 02:11:14,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:11:15,958 INFO L130 PetriNetUnfolder]: 8577/11322 cut-off events. [2023-08-31 02:11:15,959 INFO L131 PetriNetUnfolder]: For 4049/4049 co-relation queries the response was YES. [2023-08-31 02:11:15,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27965 conditions, 11322 events. 8577/11322 cut-off events. For 4049/4049 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 58378 event pairs, 1867 based on Foata normal form. 126/9403 useless extension candidates. Maximal degree in co-relation 27950. Up to 4329 conditions per place. [2023-08-31 02:11:16,059 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 93 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2023-08-31 02:11:16,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 539 flow [2023-08-31 02:11:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:11:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:11:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1318 transitions. [2023-08-31 02:11:16,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796215429403202 [2023-08-31 02:11:16,063 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1318 transitions. [2023-08-31 02:11:16,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1318 transitions. [2023-08-31 02:11:16,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:11:16,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1318 transitions. [2023-08-31 02:11:16,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.66666666666666) internal successors, (1318), 6 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:16,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:16,072 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:16,072 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 6 states and 1318 transitions. [2023-08-31 02:11:16,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 539 flow [2023-08-31 02:11:16,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 535 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:11:16,078 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 227 flow [2023-08-31 02:11:16,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=227, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-31 02:11:16,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-31 02:11:16,083 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 227 flow [2023-08-31 02:11:16,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:16,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:11:16,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:11:16,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:11:16,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:11:16,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:11:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash -88060108, now seen corresponding path program 1 times [2023-08-31 02:11:16,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:11:16,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24214181] [2023-08-31 02:11:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:11:16,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:11:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:11:16,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:11:16,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24214181] [2023-08-31 02:11:16,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24214181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:11:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100474501] [2023-08-31 02:11:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:11:16,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:11:16,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:11:16,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:11:16,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:11:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 02:11:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:11:17,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 02:11:17,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:11:17,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:11:17,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:11:17,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-31 02:11:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:11:18,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:11:18,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:11:18,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2023-08-31 02:11:18,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 287 [2023-08-31 02:11:18,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 263 [2023-08-31 02:11:19,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 215 [2023-08-31 02:11:19,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 101 [2023-08-31 02:11:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:11:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100474501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:11:19,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:11:19,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 26 [2023-08-31 02:11:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12235905] [2023-08-31 02:11:19,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:11:19,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 02:11:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:11:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 02:11:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=610, Unknown=4, NotChecked=0, Total=756 [2023-08-31 02:11:22,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:11:24,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:11:27,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:11:29,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:11:29,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 458 [2023-08-31 02:11:29,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 227 flow. Second operand has 28 states, 28 states have (on average 132.71428571428572) internal successors, (3716), 28 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:29,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:11:29,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 458 [2023-08-31 02:11:29,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:11:32,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:11:56,447 INFO L130 PetriNetUnfolder]: 84742/112047 cut-off events. [2023-08-31 02:11:56,447 INFO L131 PetriNetUnfolder]: For 158294/158294 co-relation queries the response was YES. [2023-08-31 02:11:56,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332910 conditions, 112047 events. 84742/112047 cut-off events. For 158294/158294 co-relation queries the response was YES. Maximal size of possible extension queue 3472. Compared 665591 event pairs, 3928 based on Foata normal form. 122/98717 useless extension candidates. Maximal degree in co-relation 262697. Up to 16590 conditions per place. [2023-08-31 02:11:57,154 INFO L137 encePairwiseOnDemand]: 440/458 looper letters, 921 selfloop transitions, 245 changer transitions 97/1263 dead transitions. [2023-08-31 02:11:57,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 1263 transitions, 7819 flow [2023-08-31 02:11:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-31 02:11:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-31 02:11:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 9493 transitions. [2023-08-31 02:11:57,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31887806516627476 [2023-08-31 02:11:57,183 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 9493 transitions. [2023-08-31 02:11:57,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 9493 transitions. [2023-08-31 02:11:57,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:11:57,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 9493 transitions. [2023-08-31 02:11:57,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 146.04615384615386) internal successors, (9493), 65 states have internal predecessors, (9493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:57,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 458.0) internal successors, (30228), 66 states have internal predecessors, (30228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:57,262 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 458.0) internal successors, (30228), 66 states have internal predecessors, (30228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:57,263 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 227 flow. Second operand 65 states and 9493 transitions. [2023-08-31 02:11:57,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 1263 transitions, 7819 flow [2023-08-31 02:11:57,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 1263 transitions, 7664 flow, removed 75 selfloop flow, removed 1 redundant places. [2023-08-31 02:11:57,460 INFO L231 Difference]: Finished difference. Result has 160 places, 352 transitions, 2933 flow [2023-08-31 02:11:57,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=2933, PETRI_PLACES=160, PETRI_TRANSITIONS=352} [2023-08-31 02:11:57,462 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2023-08-31 02:11:57,462 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 352 transitions, 2933 flow [2023-08-31 02:11:57,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 132.71428571428572) internal successors, (3716), 28 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:57,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:11:57,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:11:57,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:11:57,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:11:57,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:11:57,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:11:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1387397044, now seen corresponding path program 2 times [2023-08-31 02:11:57,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:11:57,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863682863] [2023-08-31 02:11:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:11:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:11:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:11:58,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:11:58,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863682863] [2023-08-31 02:11:58,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863682863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:11:58,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733435177] [2023-08-31 02:11:58,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:11:58,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:11:58,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:11:58,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:11:58,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:11:58,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:11:58,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:11:59,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 02:11:59,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:11:59,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 02:11:59,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:11:59,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:11:59,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:11:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:11:59,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:11:59,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 02:11:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:11:59,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:12:00,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:12:00,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-08-31 02:12:00,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2837 treesize of output 2765 [2023-08-31 02:12:00,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 216 [2023-08-31 02:12:00,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 233 [2023-08-31 02:12:00,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 209 [2023-08-31 02:12:00,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 114 [2023-08-31 02:12:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:12:01,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733435177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:12:01,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:12:01,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-08-31 02:12:01,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205323699] [2023-08-31 02:12:01,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:12:01,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 02:12:01,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:12:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 02:12:01,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=504, Unknown=10, NotChecked=0, Total=600 [2023-08-31 02:12:03,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 458 [2023-08-31 02:12:03,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 352 transitions, 2933 flow. Second operand has 25 states, 25 states have (on average 148.0) internal successors, (3700), 25 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:03,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:12:03,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 458 [2023-08-31 02:12:03,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:12:06,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:12:23,750 INFO L130 PetriNetUnfolder]: 93262/122630 cut-off events. [2023-08-31 02:12:23,750 INFO L131 PetriNetUnfolder]: For 1453059/1457313 co-relation queries the response was YES. [2023-08-31 02:12:24,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612121 conditions, 122630 events. 93262/122630 cut-off events. For 1453059/1457313 co-relation queries the response was YES. Maximal size of possible extension queue 5212. Compared 778220 event pairs, 14914 based on Foata normal form. 2298/122148 useless extension candidates. Maximal degree in co-relation 611982. Up to 62258 conditions per place. [2023-08-31 02:12:25,377 INFO L137 encePairwiseOnDemand]: 442/458 looper letters, 403 selfloop transitions, 107 changer transitions 27/568 dead transitions. [2023-08-31 02:12:25,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 568 transitions, 5623 flow [2023-08-31 02:12:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:12:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:12:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2796 transitions. [2023-08-31 02:12:25,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33915574963609896 [2023-08-31 02:12:25,386 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2796 transitions. [2023-08-31 02:12:25,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2796 transitions. [2023-08-31 02:12:25,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:12:25,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2796 transitions. [2023-08-31 02:12:25,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.33333333333334) internal successors, (2796), 18 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:25,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:25,406 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:25,407 INFO L175 Difference]: Start difference. First operand has 160 places, 352 transitions, 2933 flow. Second operand 18 states and 2796 transitions. [2023-08-31 02:12:25,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 568 transitions, 5623 flow [2023-08-31 02:13:02,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 568 transitions, 5175 flow, removed 223 selfloop flow, removed 3 redundant places. [2023-08-31 02:13:02,752 INFO L231 Difference]: Finished difference. Result has 177 places, 376 transitions, 3110 flow [2023-08-31 02:13:02,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3110, PETRI_PLACES=177, PETRI_TRANSITIONS=376} [2023-08-31 02:13:02,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2023-08-31 02:13:02,754 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 376 transitions, 3110 flow [2023-08-31 02:13:02,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 148.0) internal successors, (3700), 25 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:02,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:13:02,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:13:02,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:13:02,963 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 [2023-08-31 02:13:02,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:13:02,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:13:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1080676777, now seen corresponding path program 3 times [2023-08-31 02:13:02,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:13:02,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076181231] [2023-08-31 02:13:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:02,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:13:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:13:04,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:13:04,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076181231] [2023-08-31 02:13:04,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076181231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:13:04,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733206485] [2023-08-31 02:13:04,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:13:04,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:13:04,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:13:04,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:13:04,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:13:04,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:13:04,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:13:04,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-31 02:13:04,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:13:05,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:13:05,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:13:05,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-31 02:13:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:13:05,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:13:05,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:13:05,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-31 02:13:05,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-31 02:13:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:13:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733206485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:13:05,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:13:05,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-08-31 02:13:05,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306910186] [2023-08-31 02:13:05,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:13:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:13:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:13:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:13:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=359, Unknown=2, NotChecked=0, Total=420 [2023-08-31 02:13:06,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 458 [2023-08-31 02:13:06,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 376 transitions, 3110 flow. Second operand has 21 states, 21 states have (on average 150.9047619047619) internal successors, (3169), 21 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:06,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:06,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 458 [2023-08-31 02:13:06,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:13:32,259 INFO L130 PetriNetUnfolder]: 127697/168649 cut-off events. [2023-08-31 02:13:32,259 INFO L131 PetriNetUnfolder]: For 1989156/1994258 co-relation queries the response was YES. [2023-08-31 02:13:33,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884825 conditions, 168649 events. 127697/168649 cut-off events. For 1989156/1994258 co-relation queries the response was YES. Maximal size of possible extension queue 7268. Compared 1119241 event pairs, 18229 based on Foata normal form. 2391/166892 useless extension candidates. Maximal degree in co-relation 884678. Up to 99293 conditions per place. [2023-08-31 02:13:34,780 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 489 selfloop transitions, 202 changer transitions 17/739 dead transitions. [2023-08-31 02:13:34,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 739 transitions, 7353 flow [2023-08-31 02:13:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 02:13:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 02:13:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2254 transitions. [2023-08-31 02:13:34,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35152838427947597 [2023-08-31 02:13:34,787 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2254 transitions. [2023-08-31 02:13:34,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2254 transitions. [2023-08-31 02:13:34,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:13:34,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2254 transitions. [2023-08-31 02:13:34,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.0) internal successors, (2254), 14 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:34,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:34,802 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:34,802 INFO L175 Difference]: Start difference. First operand has 177 places, 376 transitions, 3110 flow. Second operand 14 states and 2254 transitions. [2023-08-31 02:13:34,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 739 transitions, 7353 flow [2023-08-31 02:15:12,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 739 transitions, 7183 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-08-31 02:15:12,926 INFO L231 Difference]: Finished difference. Result has 179 places, 492 transitions, 4744 flow [2023-08-31 02:15:12,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4744, PETRI_PLACES=179, PETRI_TRANSITIONS=492} [2023-08-31 02:15:12,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2023-08-31 02:15:12,927 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 492 transitions, 4744 flow [2023-08-31 02:15:12,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 150.9047619047619) internal successors, (3169), 21 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:12,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:15:12,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:15:12,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:15:13,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:15:13,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 02:15:13,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:15:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash -112453905, now seen corresponding path program 4 times [2023-08-31 02:15:13,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:15:13,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121383428] [2023-08-31 02:15:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:15:13,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:15:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:15:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:15:14,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:15:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121383428] [2023-08-31 02:15:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121383428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:15:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758843441] [2023-08-31 02:15:14,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:15:14,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:15:14,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:15:14,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:15:14,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:15:15,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:15:15,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:15:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 02:15:15,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:15:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:15:15,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-31 02:15:15,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:15:15,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-31 02:15:15,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-08-31 02:15:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:15:15,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:15:16,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:15:16,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 79 [2023-08-31 02:15:16,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-31 02:15:16,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-31 02:15:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:15:16,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758843441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:15:16,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:15:16,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-31 02:15:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476367693] [2023-08-31 02:15:16,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:15:16,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 02:15:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:15:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 02:15:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=602, Unknown=2, NotChecked=0, Total=702 [2023-08-31 02:15:19,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:15:21,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:15:23,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:15:25,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:15:28,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:15:30,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:15:32,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:15:34,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:15:34,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 458 [2023-08-31 02:15:34,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 492 transitions, 4744 flow. Second operand has 27 states, 27 states have (on average 147.88888888888889) internal successors, (3993), 27 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:34,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:15:34,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 458 [2023-08-31 02:15:34,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand