./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:23:56,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:23:56,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:23:56,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:23:56,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:23:56,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:23:56,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:23:56,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:23:56,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:23:56,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:23:56,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:23:56,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:23:56,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:23:56,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:23:56,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:23:56,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:23:56,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:23:56,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:23:56,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:23:56,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:23:56,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:23:56,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:23:56,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:23:56,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:23:56,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:23:56,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:23:56,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:23:56,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:23:56,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:23:56,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:23:56,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:23:56,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:23:56,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:23:56,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:23:56,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:23:56,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:23:56,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:23:56,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:23:56,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:23:56,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:23:56,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:23:56,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:23:56,433 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:23:56,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:23:56,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:23:56,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:23:56,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:23:56,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:23:56,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:23:56,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:23:56,436 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:23:56,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:23:56,436 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:23:56,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:23:56,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:23:56,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:23:56,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:23:56,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:23:56,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:23:56,438 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:23:56,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:23:56,438 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:23:56,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:23:56,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:23:56,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:23:56,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:23:56,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:23:56,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:23:56,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:23:56,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:23:56,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:23:56,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:23:56,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:23:56,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:23:56,440 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:23:56,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:23:56,440 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:23:56,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:23:56,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:23:56,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:23:56,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:23:56,701 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:23:56,701 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:23:56,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-30 21:23:57,660 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:23:57,831 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:23:57,832 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-30 21:23:57,836 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed8821f0c/fd98cb9d17a943019f8abead7b5575e8/FLAG1688d7ffb [2023-08-30 21:23:57,844 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed8821f0c/fd98cb9d17a943019f8abead7b5575e8 [2023-08-30 21:23:57,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:23:57,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:23:57,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:23:57,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:23:57,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:23:57,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:57,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c51319a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57, skipping insertion in model container [2023-08-30 21:23:57,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:57,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:23:57,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:23:57,955 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-queue-add-2.wvr.c[2696,2709] [2023-08-30 21:23:57,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:23:57,965 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:23:57,977 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-queue-add-2.wvr.c[2696,2709] [2023-08-30 21:23:57,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:23:57,984 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:23:57,985 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:23:57,989 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:23:57,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57 WrapperNode [2023-08-30 21:23:57,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:23:57,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:23:57,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:23:57,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:23:57,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:57,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,014 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 158 [2023-08-30 21:23:58,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:23:58,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:23:58,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:23:58,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:23:58,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,032 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:23:58,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:23:58,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:23:58,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:23:58,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (1/1) ... [2023-08-30 21:23:58,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:23:58,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:23:58,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 21:23:58,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:23:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:23:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:23:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:23:58,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:23:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:23:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:23:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:23:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:23:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:23:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:23:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:23:58,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:23:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:23:58,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:23:58,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 21:23:58,117 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:23:58,240 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:23:58,244 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:23:58,492 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:23:58,573 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:23:58,573 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:23:58,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:23:58 BoogieIcfgContainer [2023-08-30 21:23:58,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:23:58,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:23:58,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:23:58,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:23:58,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:23:57" (1/3) ... [2023-08-30 21:23:58,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4305a068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:23:58, skipping insertion in model container [2023-08-30 21:23:58,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:23:57" (2/3) ... [2023-08-30 21:23:58,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4305a068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:23:58, skipping insertion in model container [2023-08-30 21:23:58,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:23:58" (3/3) ... [2023-08-30 21:23:58,586 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-08-30 21:23:58,591 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:23:58,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:23:58,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:23:58,598 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:23:58,651 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:23:58,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 272 flow [2023-08-30 21:23:58,751 INFO L130 PetriNetUnfolder]: 11/126 cut-off events. [2023-08-30 21:23:58,752 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:23:58,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-08-30 21:23:58,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 128 transitions, 272 flow [2023-08-30 21:23:58,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 118 transitions, 248 flow [2023-08-30 21:23:58,763 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:23:58,775 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-30 21:23:58,778 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-30 21:23:58,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 118 transitions, 248 flow [2023-08-30 21:23:58,810 INFO L130 PetriNetUnfolder]: 11/118 cut-off events. [2023-08-30 21:23:58,810 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:23:58,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 11/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-08-30 21:23:58,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 538 [2023-08-30 21:24:02,113 INFO L134 LiptonReduction]: Checked pairs total: 676 [2023-08-30 21:24:02,113 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-30 21:24:02,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:24:02,125 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;@2ad3536b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:24:02,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:24:02,130 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-30 21:24:02,130 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:24:02,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:02,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:02,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:02,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1821199336, now seen corresponding path program 1 times [2023-08-30 21:24:02,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:02,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089339404] [2023-08-30 21:24:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:02,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:02,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089339404] [2023-08-30 21:24:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089339404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:24:02,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:24:02,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:24:02,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847473319] [2023-08-30 21:24:02,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:24:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:24:02,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:24:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:24:02,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 249 [2023-08-30 21:24:02,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:02,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 249 [2023-08-30 21:24:02,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:02,593 INFO L130 PetriNetUnfolder]: 45/87 cut-off events. [2023-08-30 21:24:02,594 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 21:24:02,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 87 events. 45/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 18 based on Foata normal form. 4/63 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-30 21:24:02,595 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 14 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2023-08-30 21:24:02,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2023-08-30 21:24:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:24:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:24:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2023-08-30 21:24:02,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508032128514056 [2023-08-30 21:24:02,612 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2023-08-30 21:24:02,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2023-08-30 21:24:02,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:02,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2023-08-30 21:24:02,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,622 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 449 transitions. [2023-08-30 21:24:02,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 106 flow [2023-08-30 21:24:02,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:24:02,625 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-08-30 21:24:02,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-08-30 21:24:02,628 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-30 21:24:02,628 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-08-30 21:24:02,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:02,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:02,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:24:02,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:02,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash -885649661, now seen corresponding path program 1 times [2023-08-30 21:24:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:02,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846199970] [2023-08-30 21:24:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:02,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:02,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846199970] [2023-08-30 21:24:02,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846199970] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:24:02,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:24:02,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:24:02,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964471001] [2023-08-30 21:24:02,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:24:02,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:24:02,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:02,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:24:02,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:24:02,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 249 [2023-08-30 21:24:02,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:02,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 249 [2023-08-30 21:24:02,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:02,979 INFO L130 PetriNetUnfolder]: 72/136 cut-off events. [2023-08-30 21:24:02,980 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 21:24:02,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 136 events. 72/136 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 422 event pairs, 15 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 350. Up to 77 conditions per place. [2023-08-30 21:24:02,981 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 32 selfloop transitions, 8 changer transitions 2/43 dead transitions. [2023-08-30 21:24:02,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 218 flow [2023-08-30 21:24:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:24:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:24:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 672 transitions. [2023-08-30 21:24:02,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497991967871486 [2023-08-30 21:24:02,985 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 672 transitions. [2023-08-30 21:24:02,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 672 transitions. [2023-08-30 21:24:02,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:02,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 672 transitions. [2023-08-30 21:24:02,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,991 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,992 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 6 states and 672 transitions. [2023-08-30 21:24:02,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 218 flow [2023-08-30 21:24:02,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 21:24:02,993 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 112 flow [2023-08-30 21:24:02,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-08-30 21:24:02,994 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-30 21:24:02,994 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 112 flow [2023-08-30 21:24:02,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:02,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:02,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:02,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:24:02,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:02,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 919629356, now seen corresponding path program 1 times [2023-08-30 21:24:02,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:02,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567853681] [2023-08-30 21:24:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:02,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:03,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567853681] [2023-08-30 21:24:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567853681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:24:03,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:24:03,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:24:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281622756] [2023-08-30 21:24:03,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:24:03,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:24:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:24:03,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:24:03,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 249 [2023-08-30 21:24:03,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:03,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 249 [2023-08-30 21:24:03,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:03,198 INFO L130 PetriNetUnfolder]: 87/181 cut-off events. [2023-08-30 21:24:03,198 INFO L131 PetriNetUnfolder]: For 122/124 co-relation queries the response was YES. [2023-08-30 21:24:03,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 181 events. 87/181 cut-off events. For 122/124 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 640 event pairs, 12 based on Foata normal form. 17/170 useless extension candidates. Maximal degree in co-relation 577. Up to 109 conditions per place. [2023-08-30 21:24:03,200 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 30 selfloop transitions, 9 changer transitions 2/43 dead transitions. [2023-08-30 21:24:03,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 262 flow [2023-08-30 21:24:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:24:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:24:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-30 21:24:03,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708835341365462 [2023-08-30 21:24:03,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-30 21:24:03,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-30 21:24:03,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:03,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-30 21:24:03,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,204 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,204 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 112 flow. Second operand 4 states and 469 transitions. [2023-08-30 21:24:03,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 262 flow [2023-08-30 21:24:03,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 249 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 21:24:03,206 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 165 flow [2023-08-30 21:24:03,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-30 21:24:03,207 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-30 21:24:03,207 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 165 flow [2023-08-30 21:24:03,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:03,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:03,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:24:03,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:03,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash -86135109, now seen corresponding path program 1 times [2023-08-30 21:24:03,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:03,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260411373] [2023-08-30 21:24:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:03,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260411373] [2023-08-30 21:24:03,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260411373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:03,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341901035] [2023-08-30 21:24:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:03,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:03,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:03,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:03,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:24:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 21:24:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:03,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341901035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:03,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:03,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 21:24:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077165830] [2023-08-30 21:24:03,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:03,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:24:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:24:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:24:03,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 249 [2023-08-30 21:24:03,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:03,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 249 [2023-08-30 21:24:03,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:03,733 INFO L130 PetriNetUnfolder]: 82/182 cut-off events. [2023-08-30 21:24:03,733 INFO L131 PetriNetUnfolder]: For 327/332 co-relation queries the response was YES. [2023-08-30 21:24:03,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 182 events. 82/182 cut-off events. For 327/332 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 36 based on Foata normal form. 13/166 useless extension candidates. Maximal degree in co-relation 733. Up to 158 conditions per place. [2023-08-30 21:24:03,735 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 23 selfloop transitions, 3 changer transitions 11/39 dead transitions. [2023-08-30 21:24:03,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 290 flow [2023-08-30 21:24:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:24:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:24:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2023-08-30 21:24:03,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42971887550200805 [2023-08-30 21:24:03,737 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2023-08-30 21:24:03,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2023-08-30 21:24:03,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:03,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2023-08-30 21:24:03,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,740 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,740 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 165 flow. Second operand 6 states and 642 transitions. [2023-08-30 21:24:03,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 290 flow [2023-08-30 21:24:03,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 262 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-30 21:24:03,743 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 167 flow [2023-08-30 21:24:03,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=167, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-30 21:24:03,743 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-08-30 21:24:03,743 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 167 flow [2023-08-30 21:24:03,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:03,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:03,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:03,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 21:24:03,949 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 [2023-08-30 21:24:03,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:03,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash -984099166, now seen corresponding path program 2 times [2023-08-30 21:24:03,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:03,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633591672] [2023-08-30 21:24:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:03,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:04,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:04,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633591672] [2023-08-30 21:24:04,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633591672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:04,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527691886] [2023-08-30 21:24:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:24:04,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:04,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:04,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:24:04,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:24:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:24:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:04,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:24:04,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:24:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:04,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:04,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:04,889 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 [2023-08-30 21:24:04,894 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 24 treesize of output 18 [2023-08-30 21:24:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:05,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527691886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:05,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:05,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 21:24:05,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322536439] [2023-08-30 21:24:05,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:05,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:24:05,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:24:05,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:24:05,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 21:24:05,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 167 flow. Second operand has 23 states, 23 states have (on average 91.6086956521739) internal successors, (2107), 23 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:05,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:05,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 21:24:05,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:07,030 INFO L130 PetriNetUnfolder]: 301/624 cut-off events. [2023-08-30 21:24:07,031 INFO L131 PetriNetUnfolder]: For 1182/1190 co-relation queries the response was YES. [2023-08-30 21:24:07,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 624 events. 301/624 cut-off events. For 1182/1190 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3121 event pairs, 20 based on Foata normal form. 54/569 useless extension candidates. Maximal degree in co-relation 2380. Up to 255 conditions per place. [2023-08-30 21:24:07,037 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 108 selfloop transitions, 68 changer transitions 1/179 dead transitions. [2023-08-30 21:24:07,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 179 transitions, 1278 flow [2023-08-30 21:24:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:24:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:24:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2492 transitions. [2023-08-30 21:24:07,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492431263515603 [2023-08-30 21:24:07,044 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2492 transitions. [2023-08-30 21:24:07,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2492 transitions. [2023-08-30 21:24:07,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:07,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2492 transitions. [2023-08-30 21:24:07,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 95.84615384615384) internal successors, (2492), 26 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:07,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:07,071 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:07,072 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 167 flow. Second operand 26 states and 2492 transitions. [2023-08-30 21:24:07,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 179 transitions, 1278 flow [2023-08-30 21:24:07,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 179 transitions, 1228 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-08-30 21:24:07,077 INFO L231 Difference]: Finished difference. Result has 62 places, 106 transitions, 944 flow [2023-08-30 21:24:07,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=944, PETRI_PLACES=62, PETRI_TRANSITIONS=106} [2023-08-30 21:24:07,079 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-08-30 21:24:07,090 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 106 transitions, 944 flow [2023-08-30 21:24:07,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.6086956521739) internal successors, (2107), 23 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:07,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:07,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:07,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:07,292 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 [2023-08-30 21:24:07,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:07,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1199743108, now seen corresponding path program 3 times [2023-08-30 21:24:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:07,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670861844] [2023-08-30 21:24:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:07,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:07,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670861844] [2023-08-30 21:24:07,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670861844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973077707] [2023-08-30 21:24:07,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:24:07,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:07,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:07,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:07,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:24:07,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:24:07,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:24:07,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:24:07,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:24:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:08,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:08,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:08,215 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 [2023-08-30 21:24:08,219 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 24 treesize of output 18 [2023-08-30 21:24:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:08,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973077707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:08,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:08,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 21:24:08,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278004365] [2023-08-30 21:24:08,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:08,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:24:08,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:24:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:24:08,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 21:24:08,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 106 transitions, 944 flow. Second operand has 23 states, 23 states have (on average 91.78260869565217) internal successors, (2111), 23 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:08,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:08,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 21:24:08,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:09,647 INFO L130 PetriNetUnfolder]: 325/648 cut-off events. [2023-08-30 21:24:09,648 INFO L131 PetriNetUnfolder]: For 1774/1777 co-relation queries the response was YES. [2023-08-30 21:24:09,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 648 events. 325/648 cut-off events. For 1774/1777 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3087 event pairs, 40 based on Foata normal form. 21/564 useless extension candidates. Maximal degree in co-relation 2333. Up to 285 conditions per place. [2023-08-30 21:24:09,652 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 103 selfloop transitions, 52 changer transitions 0/157 dead transitions. [2023-08-30 21:24:09,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 157 transitions, 1511 flow [2023-08-30 21:24:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 21:24:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 21:24:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1712 transitions. [2023-08-30 21:24:09,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819723337795627 [2023-08-30 21:24:09,657 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1712 transitions. [2023-08-30 21:24:09,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1712 transitions. [2023-08-30 21:24:09,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:09,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1712 transitions. [2023-08-30 21:24:09,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 95.11111111111111) internal successors, (1712), 18 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:09,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:09,665 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:09,665 INFO L175 Difference]: Start difference. First operand has 62 places, 106 transitions, 944 flow. Second operand 18 states and 1712 transitions. [2023-08-30 21:24:09,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 157 transitions, 1511 flow [2023-08-30 21:24:09,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 157 transitions, 1205 flow, removed 149 selfloop flow, removed 5 redundant places. [2023-08-30 21:24:09,675 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 900 flow [2023-08-30 21:24:09,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=900, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2023-08-30 21:24:09,677 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2023-08-30 21:24:09,678 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 900 flow [2023-08-30 21:24:09,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.78260869565217) internal successors, (2111), 23 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:09,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:09,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:09,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:09,883 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 [2023-08-30 21:24:09,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:09,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1201797661, now seen corresponding path program 1 times [2023-08-30 21:24:09,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:09,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41112460] [2023-08-30 21:24:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:09,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:10,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:10,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41112460] [2023-08-30 21:24:10,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41112460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:10,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106732168] [2023-08-30 21:24:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:10,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:10,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:10,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:10,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:24:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:24:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:24:10,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:10,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:10,670 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 53 treesize of output 29 [2023-08-30 21:24:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:24:10,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106732168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:10,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:10,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-08-30 21:24:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238288706] [2023-08-30 21:24:10,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:10,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:24:10,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:24:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:24:11,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 21:24:11,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 111 transitions, 900 flow. Second operand has 19 states, 19 states have (on average 90.26315789473684) internal successors, (1715), 19 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:11,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:11,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 21:24:11,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:11,584 INFO L130 PetriNetUnfolder]: 365/730 cut-off events. [2023-08-30 21:24:11,584 INFO L131 PetriNetUnfolder]: For 1900/1900 co-relation queries the response was YES. [2023-08-30 21:24:11,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3203 conditions, 730 events. 365/730 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3606 event pairs, 57 based on Foata normal form. 10/680 useless extension candidates. Maximal degree in co-relation 2904. Up to 599 conditions per place. [2023-08-30 21:24:11,588 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 125 selfloop transitions, 30 changer transitions 4/160 dead transitions. [2023-08-30 21:24:11,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 160 transitions, 1458 flow [2023-08-30 21:24:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 21:24:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 21:24:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1396 transitions. [2023-08-30 21:24:11,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37376171352074966 [2023-08-30 21:24:11,591 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1396 transitions. [2023-08-30 21:24:11,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1396 transitions. [2023-08-30 21:24:11,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:11,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1396 transitions. [2023-08-30 21:24:11,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.06666666666666) internal successors, (1396), 15 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:11,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:11,597 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:11,597 INFO L175 Difference]: Start difference. First operand has 79 places, 111 transitions, 900 flow. Second operand 15 states and 1396 transitions. [2023-08-30 21:24:11,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 160 transitions, 1458 flow [2023-08-30 21:24:11,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 160 transitions, 1409 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 21:24:11,605 INFO L231 Difference]: Finished difference. Result has 90 places, 125 transitions, 1098 flow [2023-08-30 21:24:11,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1098, PETRI_PLACES=90, PETRI_TRANSITIONS=125} [2023-08-30 21:24:11,606 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-08-30 21:24:11,606 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 125 transitions, 1098 flow [2023-08-30 21:24:11,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.26315789473684) internal successors, (1715), 19 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:11,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:11,607 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:11,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 21:24:11,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:11,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:11,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash 232462075, now seen corresponding path program 4 times [2023-08-30 21:24:11,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:11,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128928993] [2023-08-30 21:24:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:12,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128928993] [2023-08-30 21:24:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128928993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:12,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917235940] [2023-08-30 21:24:12,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:24:12,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:12,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:12,457 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:12,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:24:12,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:24:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 21:24:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:12,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:24:12,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:24:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:24:12,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:12,659 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-08-30 21:24:12,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:12,667 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 [2023-08-30 21:24:12,669 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 24 treesize of output 18 [2023-08-30 21:24:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:24:12,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917235940] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:12,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:24:12,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 18 [2023-08-30 21:24:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603573367] [2023-08-30 21:24:12,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:24:12,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:24:12,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:24:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=266, Unknown=1, NotChecked=32, Total=342 [2023-08-30 21:24:12,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 21:24:12,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 125 transitions, 1098 flow. Second operand has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:12,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:12,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 21:24:12,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:12,767 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (not (= (select (select |c_#memory_int| c_~q~0.base) .cse0) 0)) (forall ((v_ArrVal_216 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~q~0.base) .cse0) 0))))) is different from false [2023-08-30 21:24:12,859 INFO L130 PetriNetUnfolder]: 398/774 cut-off events. [2023-08-30 21:24:12,859 INFO L131 PetriNetUnfolder]: For 3282/3292 co-relation queries the response was YES. [2023-08-30 21:24:12,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3753 conditions, 774 events. 398/774 cut-off events. For 3282/3292 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3807 event pairs, 56 based on Foata normal form. 12/734 useless extension candidates. Maximal degree in co-relation 3452. Up to 622 conditions per place. [2023-08-30 21:24:12,864 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 129 selfloop transitions, 31 changer transitions 0/163 dead transitions. [2023-08-30 21:24:12,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 163 transitions, 1806 flow [2023-08-30 21:24:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:24:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:24:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2023-08-30 21:24:12,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39598393574297186 [2023-08-30 21:24:12,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2023-08-30 21:24:12,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2023-08-30 21:24:12,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:12,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2023-08-30 21:24:12,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:12,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:12,869 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:12,869 INFO L175 Difference]: Start difference. First operand has 90 places, 125 transitions, 1098 flow. Second operand 5 states and 493 transitions. [2023-08-30 21:24:12,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 163 transitions, 1806 flow [2023-08-30 21:24:12,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 163 transitions, 1712 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-30 21:24:12,879 INFO L231 Difference]: Finished difference. Result has 87 places, 140 transitions, 1365 flow [2023-08-30 21:24:12,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1365, PETRI_PLACES=87, PETRI_TRANSITIONS=140} [2023-08-30 21:24:12,880 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 66 predicate places. [2023-08-30 21:24:12,880 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 140 transitions, 1365 flow [2023-08-30 21:24:12,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:12,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:12,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:12,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 21:24:13,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:13,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:13,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1314770777, now seen corresponding path program 2 times [2023-08-30 21:24:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541635647] [2023-08-30 21:24:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:13,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:13,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541635647] [2023-08-30 21:24:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541635647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:13,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103155212] [2023-08-30 21:24:13,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:24:13,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:13,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:13,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:24:13,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:24:13,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:13,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:24:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:13,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:13,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:13,745 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 42 treesize of output 26 [2023-08-30 21:24:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:24:13,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103155212] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:13,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:13,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 18 [2023-08-30 21:24:13,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814389549] [2023-08-30 21:24:13,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:13,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:24:13,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:24:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:24:14,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 21:24:14,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 140 transitions, 1365 flow. Second operand has 20 states, 20 states have (on average 90.25) internal successors, (1805), 20 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:14,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:14,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 21:24:14,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:14,689 INFO L130 PetriNetUnfolder]: 421/828 cut-off events. [2023-08-30 21:24:14,690 INFO L131 PetriNetUnfolder]: For 3957/3957 co-relation queries the response was YES. [2023-08-30 21:24:14,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4248 conditions, 828 events. 421/828 cut-off events. For 3957/3957 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4207 event pairs, 61 based on Foata normal form. 2/779 useless extension candidates. Maximal degree in co-relation 3921. Up to 616 conditions per place. [2023-08-30 21:24:14,694 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 129 selfloop transitions, 41 changer transitions 17/188 dead transitions. [2023-08-30 21:24:14,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 188 transitions, 2020 flow [2023-08-30 21:24:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 21:24:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 21:24:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1401 transitions. [2023-08-30 21:24:14,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3751004016064257 [2023-08-30 21:24:14,697 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1401 transitions. [2023-08-30 21:24:14,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1401 transitions. [2023-08-30 21:24:14,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:14,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1401 transitions. [2023-08-30 21:24:14,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.4) internal successors, (1401), 15 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:14,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:14,703 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:14,703 INFO L175 Difference]: Start difference. First operand has 87 places, 140 transitions, 1365 flow. Second operand 15 states and 1401 transitions. [2023-08-30 21:24:14,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 188 transitions, 2020 flow [2023-08-30 21:24:14,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 188 transitions, 2008 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:24:14,714 INFO L231 Difference]: Finished difference. Result has 103 places, 142 transitions, 1489 flow [2023-08-30 21:24:14,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1489, PETRI_PLACES=103, PETRI_TRANSITIONS=142} [2023-08-30 21:24:14,715 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2023-08-30 21:24:14,715 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 142 transitions, 1489 flow [2023-08-30 21:24:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.25) internal successors, (1805), 20 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:14,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:14,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:14,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:14,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:14,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:14,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:14,921 INFO L85 PathProgramCache]: Analyzing trace with hash -783438641, now seen corresponding path program 3 times [2023-08-30 21:24:14,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:14,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98519521] [2023-08-30 21:24:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:14,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:15,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:15,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98519521] [2023-08-30 21:24:15,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98519521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:15,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461029945] [2023-08-30 21:24:15,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:24:15,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:15,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:15,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:15,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:24:15,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:24:15,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:15,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 21:24:15,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:15,508 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 [2023-08-30 21:24:15,546 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 [2023-08-30 21:24:15,577 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 [2023-08-30 21:24:15,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:24:15,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 21:24:15,750 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:24:15,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:15,751 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 17 treesize of output 10 [2023-08-30 21:24:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:15,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:15,998 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~q~0.base) .cse0)) 2)) (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~q~0.base) .cse0)))))) (< c_~q_back~0 0) (<= c_~n~0 (+ c_~q_back~0 1))) is different from false [2023-08-30 21:24:16,039 WARN L839 $PredicateComparison]: unable to prove that (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~q_back~0 0) (<= c_~n~0 (+ c_~q_back~0 1)) (let ((.cse1 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1)) 2)) (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2) 1))))) (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1)))) (not (= (select (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2) 1)))))))) is different from false [2023-08-30 21:24:16,070 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse2 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1)) (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2))))) (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))) (< c_~q_back~0 0) (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (<= c_~n~0 (+ c_~q_back~0 1))) is different from false [2023-08-30 21:24:16,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:16,094 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 2 case distinctions, treesize of input 75 treesize of output 60 [2023-08-30 21:24:16,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:16,101 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 108 treesize of output 100 [2023-08-30 21:24:16,115 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 [2023-08-30 21:24:16,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:16,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 51 [2023-08-30 21:24:16,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:16,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 60 [2023-08-30 21:24:16,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:24:16,205 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 21:24:16,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-08-30 21:24:16,212 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 21:24:16,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-30 21:24:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 21:24:16,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461029945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:16,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:16,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-08-30 21:24:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382415201] [2023-08-30 21:24:16,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:24:16,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:24:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=497, Unknown=21, NotChecked=144, Total=756 [2023-08-30 21:24:16,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-08-30 21:24:16,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 142 transitions, 1489 flow. Second operand has 28 states, 28 states have (on average 67.67857142857143) internal successors, (1895), 28 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:16,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:16,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-08-30 21:24:16,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:16,551 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (< c_~q_back~0 0)) (.cse7 (<= c_~n~0 (+ c_~q_back~0 1))) (.cse2 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1)) (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2))))) (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))) .cse6 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse7) (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse6 .cse7 (and (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse8 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2)) (not (= (select (select .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))) (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse9 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))))) is different from false [2023-08-30 21:24:19,515 INFO L130 PetriNetUnfolder]: 544/1062 cut-off events. [2023-08-30 21:24:19,515 INFO L131 PetriNetUnfolder]: For 5566/5566 co-relation queries the response was YES. [2023-08-30 21:24:19,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5446 conditions, 1062 events. 544/1062 cut-off events. For 5566/5566 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5761 event pairs, 75 based on Foata normal form. 3/999 useless extension candidates. Maximal degree in co-relation 5343. Up to 757 conditions per place. [2023-08-30 21:24:19,523 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 158 selfloop transitions, 83 changer transitions 8/250 dead transitions. [2023-08-30 21:24:19,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 250 transitions, 2814 flow [2023-08-30 21:24:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:24:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:24:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1631 transitions. [2023-08-30 21:24:19,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28479133927012396 [2023-08-30 21:24:19,528 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1631 transitions. [2023-08-30 21:24:19,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1631 transitions. [2023-08-30 21:24:19,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:19,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1631 transitions. [2023-08-30 21:24:19,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 70.91304347826087) internal successors, (1631), 23 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:19,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 249.0) internal successors, (5976), 24 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:19,547 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 249.0) internal successors, (5976), 24 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:19,547 INFO L175 Difference]: Start difference. First operand has 103 places, 142 transitions, 1489 flow. Second operand 23 states and 1631 transitions. [2023-08-30 21:24:19,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 250 transitions, 2814 flow [2023-08-30 21:24:19,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 250 transitions, 2725 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-08-30 21:24:19,568 INFO L231 Difference]: Finished difference. Result has 122 places, 198 transitions, 2353 flow [2023-08-30 21:24:19,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2353, PETRI_PLACES=122, PETRI_TRANSITIONS=198} [2023-08-30 21:24:19,570 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-08-30 21:24:19,570 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 198 transitions, 2353 flow [2023-08-30 21:24:19,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 67.67857142857143) internal successors, (1895), 28 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:19,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:19,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:19,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 21:24:19,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:19,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:19,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1149990549, now seen corresponding path program 4 times [2023-08-30 21:24:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:19,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235327828] [2023-08-30 21:24:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:20,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:20,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235327828] [2023-08-30 21:24:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235327828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:20,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289061910] [2023-08-30 21:24:20,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:24:20,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:20,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:20,375 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:20,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:24:20,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:24:20,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 21:24:20,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:24:20,593 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 [2023-08-30 21:24:20,675 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:24:20,676 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 25 treesize of output 10 [2023-08-30 21:24:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:24:20,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:20,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:20,848 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 86 treesize of output 70 [2023-08-30 21:24:20,853 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 57 treesize of output 45 [2023-08-30 21:24:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:24:21,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289061910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:21,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:21,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-30 21:24:21,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764386352] [2023-08-30 21:24:21,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:21,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 21:24:21,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:21,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 21:24:21,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2023-08-30 21:24:21,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:24:21,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 198 transitions, 2353 flow. Second operand has 25 states, 25 states have (on average 70.84) internal successors, (1771), 25 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:21,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:21,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:24:21,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:22,471 INFO L130 PetriNetUnfolder]: 548/1082 cut-off events. [2023-08-30 21:24:22,471 INFO L131 PetriNetUnfolder]: For 6867/6867 co-relation queries the response was YES. [2023-08-30 21:24:22,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6022 conditions, 1082 events. 548/1082 cut-off events. For 6867/6867 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6007 event pairs, 64 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 5910. Up to 862 conditions per place. [2023-08-30 21:24:22,481 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 168 selfloop transitions, 57 changer transitions 22/248 dead transitions. [2023-08-30 21:24:22,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 248 transitions, 3109 flow [2023-08-30 21:24:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:24:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:24:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1466 transitions. [2023-08-30 21:24:22,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29437751004016066 [2023-08-30 21:24:22,483 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1466 transitions. [2023-08-30 21:24:22,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1466 transitions. [2023-08-30 21:24:22,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:22,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1466 transitions. [2023-08-30 21:24:22,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 73.3) internal successors, (1466), 20 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:22,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:22,489 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:22,489 INFO L175 Difference]: Start difference. First operand has 122 places, 198 transitions, 2353 flow. Second operand 20 states and 1466 transitions. [2023-08-30 21:24:22,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 248 transitions, 3109 flow [2023-08-30 21:24:22,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 248 transitions, 2959 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-08-30 21:24:22,515 INFO L231 Difference]: Finished difference. Result has 137 places, 200 transitions, 2392 flow [2023-08-30 21:24:22,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2392, PETRI_PLACES=137, PETRI_TRANSITIONS=200} [2023-08-30 21:24:22,516 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-08-30 21:24:22,516 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 200 transitions, 2392 flow [2023-08-30 21:24:22,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 70.84) internal successors, (1771), 25 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:22,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:22,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:22,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 21:24:22,719 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:22,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash -427006029, now seen corresponding path program 5 times [2023-08-30 21:24:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566824412] [2023-08-30 21:24:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:22,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566824412] [2023-08-30 21:24:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566824412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424006491] [2023-08-30 21:24:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:24:22,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:22,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:22,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:22,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:24:22,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:24:22,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:24:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:22,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:22,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424006491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:22,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:22,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:24:22,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015609397] [2023-08-30 21:24:22,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:22,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:24:22,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:24:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:24:23,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 249 [2023-08-30 21:24:23,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 200 transitions, 2392 flow. Second operand has 18 states, 18 states have (on average 103.72222222222223) internal successors, (1867), 18 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:23,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:23,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 249 [2023-08-30 21:24:23,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:23,245 INFO L130 PetriNetUnfolder]: 269/570 cut-off events. [2023-08-30 21:24:23,245 INFO L131 PetriNetUnfolder]: For 5034/5037 co-relation queries the response was YES. [2023-08-30 21:24:23,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 570 events. 269/570 cut-off events. For 5034/5037 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2843 event pairs, 75 based on Foata normal form. 43/584 useless extension candidates. Maximal degree in co-relation 3474. Up to 404 conditions per place. [2023-08-30 21:24:23,249 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 111 selfloop transitions, 9 changer transitions 16/141 dead transitions. [2023-08-30 21:24:23,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 141 transitions, 1969 flow [2023-08-30 21:24:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 21:24:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 21:24:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 857 transitions. [2023-08-30 21:24:23,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43022088353413657 [2023-08-30 21:24:23,251 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 857 transitions. [2023-08-30 21:24:23,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 857 transitions. [2023-08-30 21:24:23,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:23,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 857 transitions. [2023-08-30 21:24:23,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.125) internal successors, (857), 8 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:23,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:23,253 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:23,254 INFO L175 Difference]: Start difference. First operand has 137 places, 200 transitions, 2392 flow. Second operand 8 states and 857 transitions. [2023-08-30 21:24:23,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 141 transitions, 1969 flow [2023-08-30 21:24:23,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 141 transitions, 1676 flow, removed 28 selfloop flow, removed 30 redundant places. [2023-08-30 21:24:23,267 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 1179 flow [2023-08-30 21:24:23,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1179, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2023-08-30 21:24:23,267 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-08-30 21:24:23,267 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 1179 flow [2023-08-30 21:24:23,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.72222222222223) internal successors, (1867), 18 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:23,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:23,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:23,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:23,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:23,473 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:23,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash -569502272, now seen corresponding path program 6 times [2023-08-30 21:24:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203475046] [2023-08-30 21:24:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:23,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:24:23,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:23,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203475046] [2023-08-30 21:24:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203475046] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:23,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762684718] [2023-08-30 21:24:23,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:24:23,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:23,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:23,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:23,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:24:23,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:24:23,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:23,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:24:23,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:23,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762684718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:23,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:23,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 18 [2023-08-30 21:24:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224388686] [2023-08-30 21:24:23,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:23,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:24:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:24:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:24:23,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 249 [2023-08-30 21:24:23,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 1179 flow. Second operand has 19 states, 19 states have (on average 102.42105263157895) internal successors, (1946), 19 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:23,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:23,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 249 [2023-08-30 21:24:23,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:24,197 INFO L130 PetriNetUnfolder]: 334/696 cut-off events. [2023-08-30 21:24:24,197 INFO L131 PetriNetUnfolder]: For 3397/3400 co-relation queries the response was YES. [2023-08-30 21:24:24,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 696 events. 334/696 cut-off events. For 3397/3400 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3573 event pairs, 16 based on Foata normal form. 23/648 useless extension candidates. Maximal degree in co-relation 3559. Up to 278 conditions per place. [2023-08-30 21:24:24,202 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 64 selfloop transitions, 57 changer transitions 45/170 dead transitions. [2023-08-30 21:24:24,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 170 transitions, 1845 flow [2023-08-30 21:24:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 21:24:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 21:24:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1376 transitions. [2023-08-30 21:24:24,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42508495520543715 [2023-08-30 21:24:24,204 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1376 transitions. [2023-08-30 21:24:24,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1376 transitions. [2023-08-30 21:24:24,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:24,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1376 transitions. [2023-08-30 21:24:24,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:24,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:24,208 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:24,208 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 1179 flow. Second operand 13 states and 1376 transitions. [2023-08-30 21:24:24,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 170 transitions, 1845 flow [2023-08-30 21:24:24,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 170 transitions, 1809 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 21:24:24,218 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 1172 flow [2023-08-30 21:24:24,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1172, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-08-30 21:24:24,219 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-08-30 21:24:24,219 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 1172 flow [2023-08-30 21:24:24,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 102.42105263157895) internal successors, (1946), 19 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:24,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:24,219 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:24,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 21:24:24,425 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:24,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash -423472240, now seen corresponding path program 7 times [2023-08-30 21:24:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754680640] [2023-08-30 21:24:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:25,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:25,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754680640] [2023-08-30 21:24:25,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754680640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605683786] [2023-08-30 21:24:25,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:24:25,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:25,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:25,214 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:25,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:24:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:25,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 21:24:25,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:25,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:24:25,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:24:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:24:25,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:25,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:25,625 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 144 treesize of output 112 [2023-08-30 21:24:25,631 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 99 treesize of output 87 [2023-08-30 21:24:25,635 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 87 treesize of output 75 [2023-08-30 21:24:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:24:25,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605683786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:25,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:25,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 25 [2023-08-30 21:24:25,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399825847] [2023-08-30 21:24:25,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:25,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:24:25,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:24:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=623, Unknown=1, NotChecked=0, Total=702 [2023-08-30 21:24:26,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:24:26,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 1172 flow. Second operand has 27 states, 27 states have (on average 70.70370370370371) internal successors, (1909), 27 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:26,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:26,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:24:26,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:27,440 INFO L130 PetriNetUnfolder]: 303/608 cut-off events. [2023-08-30 21:24:27,441 INFO L131 PetriNetUnfolder]: For 3753/3756 co-relation queries the response was YES. [2023-08-30 21:24:27,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 608 events. 303/608 cut-off events. For 3753/3756 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2849 event pairs, 18 based on Foata normal form. 9/546 useless extension candidates. Maximal degree in co-relation 3542. Up to 448 conditions per place. [2023-08-30 21:24:27,444 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 88 selfloop transitions, 38 changer transitions 29/156 dead transitions. [2023-08-30 21:24:27,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1935 flow [2023-08-30 21:24:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 21:24:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 21:24:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1179 transitions. [2023-08-30 21:24:27,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29593373493975905 [2023-08-30 21:24:27,446 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1179 transitions. [2023-08-30 21:24:27,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1179 transitions. [2023-08-30 21:24:27,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:27,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1179 transitions. [2023-08-30 21:24:27,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.6875) internal successors, (1179), 16 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:27,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:27,451 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:27,451 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 1172 flow. Second operand 16 states and 1179 transitions. [2023-08-30 21:24:27,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1935 flow [2023-08-30 21:24:27,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 156 transitions, 1816 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-30 21:24:27,460 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 1292 flow [2023-08-30 21:24:27,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1292, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2023-08-30 21:24:27,461 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2023-08-30 21:24:27,461 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 1292 flow [2023-08-30 21:24:27,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 70.70370370370371) internal successors, (1909), 27 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:27,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:27,462 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:27,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:27,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 21:24:27,667 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:27,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash -468317386, now seen corresponding path program 8 times [2023-08-30 21:24:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116130305] [2023-08-30 21:24:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:27,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:27,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116130305] [2023-08-30 21:24:27,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116130305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:27,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936150068] [2023-08-30 21:24:27,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:24:27,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:27,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:27,981 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:27,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:24:28,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:24:28,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:28,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 21:24:28,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:28,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:28,371 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 21:24:28,371 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 26 treesize of output 14 [2023-08-30 21:24:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:28,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936150068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:28,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:28,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 21:24:28,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245593320] [2023-08-30 21:24:28,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:28,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:24:28,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:28,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:24:28,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:24:29,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 249 [2023-08-30 21:24:29,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 1292 flow. Second operand has 29 states, 29 states have (on average 95.65517241379311) internal successors, (2774), 29 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:29,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:29,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 249 [2023-08-30 21:24:29,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:30,685 INFO L130 PetriNetUnfolder]: 757/1446 cut-off events. [2023-08-30 21:24:30,686 INFO L131 PetriNetUnfolder]: For 6489/6497 co-relation queries the response was YES. [2023-08-30 21:24:30,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 1446 events. 757/1446 cut-off events. For 6489/6497 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8115 event pairs, 37 based on Foata normal form. 100/1317 useless extension candidates. Maximal degree in co-relation 7521. Up to 777 conditions per place. [2023-08-30 21:24:30,694 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 202 selfloop transitions, 189 changer transitions 1/397 dead transitions. [2023-08-30 21:24:30,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 397 transitions, 4152 flow [2023-08-30 21:24:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 21:24:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 21:24:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4030 transitions. [2023-08-30 21:24:30,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046184738955823 [2023-08-30 21:24:30,698 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4030 transitions. [2023-08-30 21:24:30,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4030 transitions. [2023-08-30 21:24:30,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:30,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4030 transitions. [2023-08-30 21:24:30,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 100.75) internal successors, (4030), 40 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:30,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 249.0) internal successors, (10209), 41 states have internal predecessors, (10209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:30,710 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 249.0) internal successors, (10209), 41 states have internal predecessors, (10209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:30,710 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 1292 flow. Second operand 40 states and 4030 transitions. [2023-08-30 21:24:30,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 397 transitions, 4152 flow [2023-08-30 21:24:30,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 397 transitions, 3926 flow, removed 77 selfloop flow, removed 12 redundant places. [2023-08-30 21:24:30,726 INFO L231 Difference]: Finished difference. Result has 125 places, 263 transitions, 3328 flow [2023-08-30 21:24:30,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3328, PETRI_PLACES=125, PETRI_TRANSITIONS=263} [2023-08-30 21:24:30,726 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2023-08-30 21:24:30,726 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 263 transitions, 3328 flow [2023-08-30 21:24:30,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.65517241379311) internal successors, (2774), 29 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:30,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:30,727 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:30,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:30,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:24:30,932 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:30,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:30,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1087033086, now seen corresponding path program 9 times [2023-08-30 21:24:30,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:30,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829933498] [2023-08-30 21:24:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:30,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:31,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829933498] [2023-08-30 21:24:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829933498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552073274] [2023-08-30 21:24:31,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:24:31,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:31,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:31,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:31,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:24:31,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:24:31,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:31,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 21:24:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:31,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:24:31,720 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 [2023-08-30 21:24:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:24:31,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:31,777 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_509 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_509) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-08-30 21:24:31,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:31,805 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 47 treesize of output 40 [2023-08-30 21:24:31,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 21:24:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 21:24:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552073274] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:31,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:31,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2023-08-30 21:24:31,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964349576] [2023-08-30 21:24:31,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:31,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:24:31,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:24:31,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2023-08-30 21:24:31,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-08-30 21:24:31,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 263 transitions, 3328 flow. Second operand has 24 states, 24 states have (on average 81.75) internal successors, (1962), 24 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:31,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:31,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-08-30 21:24:31,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:24:32,891 INFO L130 PetriNetUnfolder]: 1163/2163 cut-off events. [2023-08-30 21:24:32,891 INFO L131 PetriNetUnfolder]: For 10079/10084 co-relation queries the response was YES. [2023-08-30 21:24:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 2163 events. 1163/2163 cut-off events. For 10079/10084 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12432 event pairs, 24 based on Foata normal form. 100/1975 useless extension candidates. Maximal degree in co-relation 12804. Up to 1295 conditions per place. [2023-08-30 21:24:32,910 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 288 selfloop transitions, 200 changer transitions 2/495 dead transitions. [2023-08-30 21:24:32,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 495 transitions, 6651 flow [2023-08-30 21:24:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 21:24:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 21:24:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1801 transitions. [2023-08-30 21:24:32,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444253203289348 [2023-08-30 21:24:32,913 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1801 transitions. [2023-08-30 21:24:32,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1801 transitions. [2023-08-30 21:24:32,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:24:32,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1801 transitions. [2023-08-30 21:24:32,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.76190476190476) internal successors, (1801), 21 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:32,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 249.0) internal successors, (5478), 22 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:32,923 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 249.0) internal successors, (5478), 22 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:32,923 INFO L175 Difference]: Start difference. First operand has 125 places, 263 transitions, 3328 flow. Second operand 21 states and 1801 transitions. [2023-08-30 21:24:32,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 495 transitions, 6651 flow [2023-08-30 21:24:32,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 495 transitions, 5525 flow, removed 557 selfloop flow, removed 5 redundant places. [2023-08-30 21:24:32,959 INFO L231 Difference]: Finished difference. Result has 148 places, 377 transitions, 4656 flow [2023-08-30 21:24:32,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4656, PETRI_PLACES=148, PETRI_TRANSITIONS=377} [2023-08-30 21:24:32,960 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-08-30 21:24:32,960 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 377 transitions, 4656 flow [2023-08-30 21:24:32,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.75) internal successors, (1962), 24 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:24:32,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:32,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:32,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:33,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 21:24:33,167 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:33,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:33,167 INFO L85 PathProgramCache]: Analyzing trace with hash 812732897, now seen corresponding path program 10 times [2023-08-30 21:24:33,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:33,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576898990] [2023-08-30 21:24:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:33,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:33,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576898990] [2023-08-30 21:24:33,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576898990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:33,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099007143] [2023-08-30 21:24:33,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:24:33,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:33,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:33,745 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:33,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 21:24:33,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:24:33,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:33,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-30 21:24:33,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:33,903 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 [2023-08-30 21:24:33,943 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 [2023-08-30 21:24:33,984 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 [2023-08-30 21:24:34,015 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 [2023-08-30 21:24:34,074 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 [2023-08-30 21:24:34,424 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-30 21:24:34,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-08-30 21:24:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:34,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:46,347 INFO L321 Elim1Store]: treesize reduction 104, result has 49.3 percent of original size [2023-08-30 21:24:46,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 481 treesize of output 331 [2023-08-30 21:24:46,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:46,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 720 treesize of output 782 [2023-08-30 21:24:46,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:46,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 639 treesize of output 620 [2023-08-30 21:24:46,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:46,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 575 treesize of output 588 [2023-08-30 21:24:46,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:46,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 578 treesize of output 654 [2023-08-30 21:24:46,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:46,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 511 treesize of output 492 [2023-08-30 21:24:46,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:24:46,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 447 treesize of output 460 [2023-08-30 21:25:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:25:35,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099007143] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:25:35,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:25:35,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-08-30 21:25:35,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098438770] [2023-08-30 21:25:35,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:25:35,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 21:25:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:25:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 21:25:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1139, Unknown=9, NotChecked=0, Total=1332 [2023-08-30 21:25:37,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:39,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:41,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:43,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:45,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:47,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:49,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:51,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:53,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:55,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:57,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:25:59,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:01,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:03,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:05,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:07,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:09,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:11,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:13,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:15,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:18,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:20,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:26:20,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-08-30 21:26:20,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 377 transitions, 4656 flow. Second operand has 37 states, 37 states have (on average 67.56756756756756) internal successors, (2500), 37 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:26:20,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:26:20,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-08-30 21:26:20,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:26:27,465 WARN L222 SmtUtils]: Spent 6.83s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:26:58,107 WARN L222 SmtUtils]: Spent 30.51s on a formula simplification. DAG size of input: 112 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:27:29,431 WARN L222 SmtUtils]: Spent 31.11s on a formula simplification. DAG size of input: 117 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:27:32,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:27:34,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:27:37,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:27:40,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:27:43,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:27:58,251 WARN L222 SmtUtils]: Spent 14.08s on a formula simplification. DAG size of input: 136 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:28:00,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:28:02,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:28:04,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:28:06,171 INFO L130 PetriNetUnfolder]: 1347/2518 cut-off events. [2023-08-30 21:28:06,172 INFO L131 PetriNetUnfolder]: For 12207/12208 co-relation queries the response was YES. [2023-08-30 21:28:06,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14160 conditions, 2518 events. 1347/2518 cut-off events. For 12207/12208 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15277 event pairs, 152 based on Foata normal form. 4/2372 useless extension candidates. Maximal degree in co-relation 14114. Up to 1697 conditions per place. [2023-08-30 21:28:06,188 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 423 selfloop transitions, 85 changer transitions 5/514 dead transitions. [2023-08-30 21:28:06,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 514 transitions, 6798 flow [2023-08-30 21:28:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 21:28:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 21:28:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1707 transitions. [2023-08-30 21:28:06,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2856425702811245 [2023-08-30 21:28:06,192 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1707 transitions. [2023-08-30 21:28:06,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1707 transitions. [2023-08-30 21:28:06,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:06,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1707 transitions. [2023-08-30 21:28:06,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 71.125) internal successors, (1707), 24 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:06,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:06,198 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:06,198 INFO L175 Difference]: Start difference. First operand has 148 places, 377 transitions, 4656 flow. Second operand 24 states and 1707 transitions. [2023-08-30 21:28:06,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 514 transitions, 6798 flow [2023-08-30 21:28:06,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 514 transitions, 6360 flow, removed 153 selfloop flow, removed 10 redundant places. [2023-08-30 21:28:06,258 INFO L231 Difference]: Finished difference. Result has 171 places, 429 transitions, 5140 flow [2023-08-30 21:28:06,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=4231, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5140, PETRI_PLACES=171, PETRI_TRANSITIONS=429} [2023-08-30 21:28:06,259 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2023-08-30 21:28:06,259 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 429 transitions, 5140 flow [2023-08-30 21:28:06,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 67.56756756756756) internal successors, (2500), 37 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:06,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:06,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:06,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 21:28:06,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:06,464 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:06,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 164827637, now seen corresponding path program 11 times [2023-08-30 21:28:06,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:06,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403679007] [2023-08-30 21:28:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:06,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:07,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:07,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403679007] [2023-08-30 21:28:07,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403679007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:28:07,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147984441] [2023-08-30 21:28:07,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:28:07,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:07,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:28:07,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:28:07,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 21:28:07,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:28:07,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:28:07,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 21:28:07,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:28:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:07,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:28:07,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:07,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 68 [2023-08-30 21:28:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:08,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147984441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:28:08,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:28:08,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-08-30 21:28:08,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781153688] [2023-08-30 21:28:08,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:28:08,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 21:28:08,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 21:28:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 21:28:09,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 249 [2023-08-30 21:28:09,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 429 transitions, 5140 flow. Second operand has 35 states, 35 states have (on average 87.65714285714286) internal successors, (3068), 35 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:09,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:09,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 249 [2023-08-30 21:28:09,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:14,093 INFO L130 PetriNetUnfolder]: 1834/3463 cut-off events. [2023-08-30 21:28:14,094 INFO L131 PetriNetUnfolder]: For 16547/16547 co-relation queries the response was YES. [2023-08-30 21:28:14,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19479 conditions, 3463 events. 1834/3463 cut-off events. For 16547/16547 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23198 event pairs, 98 based on Foata normal form. 37/3325 useless extension candidates. Maximal degree in co-relation 19424. Up to 2258 conditions per place. [2023-08-30 21:28:14,115 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 426 selfloop transitions, 275 changer transitions 32/734 dead transitions. [2023-08-30 21:28:14,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 734 transitions, 9215 flow [2023-08-30 21:28:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 21:28:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 21:28:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3932 transitions. [2023-08-30 21:28:14,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36723638741010556 [2023-08-30 21:28:14,124 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3932 transitions. [2023-08-30 21:28:14,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3932 transitions. [2023-08-30 21:28:14,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:14,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3932 transitions. [2023-08-30 21:28:14,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 91.44186046511628) internal successors, (3932), 43 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:14,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 249.0) internal successors, (10956), 44 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:14,133 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 249.0) internal successors, (10956), 44 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:14,133 INFO L175 Difference]: Start difference. First operand has 171 places, 429 transitions, 5140 flow. Second operand 43 states and 3932 transitions. [2023-08-30 21:28:14,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 734 transitions, 9215 flow [2023-08-30 21:28:14,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 734 transitions, 8947 flow, removed 105 selfloop flow, removed 8 redundant places. [2023-08-30 21:28:14,231 INFO L231 Difference]: Finished difference. Result has 225 places, 581 transitions, 7824 flow [2023-08-30 21:28:14,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=7824, PETRI_PLACES=225, PETRI_TRANSITIONS=581} [2023-08-30 21:28:14,231 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2023-08-30 21:28:14,231 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 581 transitions, 7824 flow [2023-08-30 21:28:14,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 87.65714285714286) internal successors, (3068), 35 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:14,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:14,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:14,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 21:28:14,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 21:28:14,437 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:14,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash 211530823, now seen corresponding path program 12 times [2023-08-30 21:28:14,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:14,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275580155] [2023-08-30 21:28:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275580155] [2023-08-30 21:28:15,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275580155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:28:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413944697] [2023-08-30 21:28:15,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:28:15,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:28:15,021 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:28:15,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 21:28:15,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:28:15,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:28:15,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 21:28:15,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:28:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:28:15,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:28:15,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:15,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 62 [2023-08-30 21:28:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:28:15,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413944697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:28:15,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:28:15,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-30 21:28:15,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703672859] [2023-08-30 21:28:15,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:28:15,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:28:15,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:28:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:28:17,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 21:28:17,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 581 transitions, 7824 flow. Second operand has 28 states, 28 states have (on average 89.71428571428571) internal successors, (2512), 28 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:17,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:17,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 21:28:17,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:19,474 INFO L130 PetriNetUnfolder]: 1902/3627 cut-off events. [2023-08-30 21:28:19,474 INFO L131 PetriNetUnfolder]: For 23068/23069 co-relation queries the response was YES. [2023-08-30 21:28:19,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22564 conditions, 3627 events. 1902/3627 cut-off events. For 23068/23069 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24833 event pairs, 511 based on Foata normal form. 7/3483 useless extension candidates. Maximal degree in co-relation 22489. Up to 3092 conditions per place. [2023-08-30 21:28:19,502 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 578 selfloop transitions, 119 changer transitions 32/730 dead transitions. [2023-08-30 21:28:19,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 730 transitions, 10504 flow [2023-08-30 21:28:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 21:28:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 21:28:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3437 transitions. [2023-08-30 21:28:19,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37305980679474654 [2023-08-30 21:28:19,506 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3437 transitions. [2023-08-30 21:28:19,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3437 transitions. [2023-08-30 21:28:19,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:19,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3437 transitions. [2023-08-30 21:28:19,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 92.89189189189189) internal successors, (3437), 37 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:19,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:19,514 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:19,514 INFO L175 Difference]: Start difference. First operand has 225 places, 581 transitions, 7824 flow. Second operand 37 states and 3437 transitions. [2023-08-30 21:28:19,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 730 transitions, 10504 flow [2023-08-30 21:28:19,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 730 transitions, 9995 flow, removed 227 selfloop flow, removed 16 redundant places. [2023-08-30 21:28:19,679 INFO L231 Difference]: Finished difference. Result has 256 places, 619 transitions, 8280 flow [2023-08-30 21:28:19,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7369, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8280, PETRI_PLACES=256, PETRI_TRANSITIONS=619} [2023-08-30 21:28:19,680 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-08-30 21:28:19,680 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 619 transitions, 8280 flow [2023-08-30 21:28:19,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 89.71428571428571) internal successors, (2512), 28 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:19,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:19,681 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:19,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 21:28:19,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:19,885 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:19,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1336306565, now seen corresponding path program 13 times [2023-08-30 21:28:19,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:19,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568782463] [2023-08-30 21:28:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:19,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:20,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568782463] [2023-08-30 21:28:20,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568782463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:28:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574568031] [2023-08-30 21:28:20,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:28:20,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:28:20,709 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:28:20,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 21:28:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:20,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-30 21:28:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:28:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:28:21,166 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 30 treesize of output 30 [2023-08-30 21:28:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:21,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:28:21,478 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse6 c_~q~0.offset)) (.cse3 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ c_~N~0 1)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (= .cse4 0) (<= c_~N~0 (+ c_~s~0 (select .cse5 .cse2) .cse4))))))))) is different from false [2023-08-30 21:28:21,501 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse6 c_~q~0.offset)) (.cse3 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ c_~N~0 1)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (= .cse4 0) (<= c_~N~0 (+ c_~s~0 (select .cse5 .cse2) .cse4)))))))))) is different from false [2023-08-30 21:28:21,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:21,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 168 [2023-08-30 21:28:21,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:21,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 103 [2023-08-30 21:28:21,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:21,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 83 [2023-08-30 21:28:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 21:28:22,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574568031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:28:22,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:28:22,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-30 21:28:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412062186] [2023-08-30 21:28:22,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:28:22,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 21:28:22,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:22,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 21:28:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1101, Unknown=6, NotChecked=138, Total=1406 [2023-08-30 21:28:22,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:28:22,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 619 transitions, 8280 flow. Second operand has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:22,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:22,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:28:22,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:23,610 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse10 c_~q~0.offset)) (.cse3 (+ .cse10 c_~q~0.offset 4))) (and (or (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse1 .cse2) .cse0)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse5 (select .cse4 .cse3))) (or (< (+ c_~s~0 (select .cse4 .cse2) .cse5) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (= .cse5 0)))))) (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0))) (or (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse6 (select .cse7 .cse3))) (or (= .cse6 0) (< (+ c_~s~0 (select .cse7 .cse2) .cse6) (+ c_~N~0 1)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse8 (select .cse9 .cse3))) (or (= .cse8 0) (<= c_~N~0 (+ c_~s~0 (select .cse9 .cse2) .cse8))))))))))) is different from false [2023-08-30 21:28:23,911 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse10 c_~q~0.offset)) (.cse3 (+ .cse10 c_~q~0.offset 4))) (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ c_~N~0 1)))))) (or (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (= .cse4 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse5 .cse2) .cse4)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse7 (select .cse6 .cse3))) (or (< (+ c_~s~0 (select .cse6 .cse2) .cse7) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (= .cse7 0)))))) (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse8 (select .cse9 .cse3))) (or (= .cse8 0) (<= c_~N~0 (+ c_~s~0 (select .cse9 .cse2) .cse8))))))))) is different from false [2023-08-30 21:28:25,375 INFO L130 PetriNetUnfolder]: 2307/4330 cut-off events. [2023-08-30 21:28:25,375 INFO L131 PetriNetUnfolder]: For 30734/30735 co-relation queries the response was YES. [2023-08-30 21:28:25,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27059 conditions, 4330 events. 2307/4330 cut-off events. For 30734/30735 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30308 event pairs, 181 based on Foata normal form. 5/4188 useless extension candidates. Maximal degree in co-relation 26973. Up to 3533 conditions per place. [2023-08-30 21:28:25,412 INFO L137 encePairwiseOnDemand]: 236/249 looper letters, 575 selfloop transitions, 306 changer transitions 6/888 dead transitions. [2023-08-30 21:28:25,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 888 transitions, 13194 flow [2023-08-30 21:28:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:28:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:28:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2143 transitions. [2023-08-30 21:28:25,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2967733000969395 [2023-08-30 21:28:25,423 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2143 transitions. [2023-08-30 21:28:25,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2143 transitions. [2023-08-30 21:28:25,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:25,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2143 transitions. [2023-08-30 21:28:25,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 73.89655172413794) internal successors, (2143), 29 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:25,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:25,430 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:25,430 INFO L175 Difference]: Start difference. First operand has 256 places, 619 transitions, 8280 flow. Second operand 29 states and 2143 transitions. [2023-08-30 21:28:25,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 888 transitions, 13194 flow [2023-08-30 21:28:25,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 888 transitions, 12934 flow, removed 70 selfloop flow, removed 20 redundant places. [2023-08-30 21:28:25,637 INFO L231 Difference]: Finished difference. Result has 275 places, 823 transitions, 12144 flow [2023-08-30 21:28:25,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=8067, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12144, PETRI_PLACES=275, PETRI_TRANSITIONS=823} [2023-08-30 21:28:25,637 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-08-30 21:28:25,638 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 823 transitions, 12144 flow [2023-08-30 21:28:25,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:25,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:25,638 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:25,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 21:28:25,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:25,843 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:25,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1466481873, now seen corresponding path program 14 times [2023-08-30 21:28:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:25,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735529536] [2023-08-30 21:28:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:25,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:26,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:26,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735529536] [2023-08-30 21:28:26,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735529536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:28:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751887670] [2023-08-30 21:28:26,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:28:26,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:26,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:28:26,472 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:28:26,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 21:28:26,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:28:26,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:28:26,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 21:28:26,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:28:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:28:26,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:28:27,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:27,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 65 [2023-08-30 21:28:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:28:27,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751887670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:28:27,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:28:27,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 25 [2023-08-30 21:28:27,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340048804] [2023-08-30 21:28:27,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:28:27,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:28:27,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:28:27,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-08-30 21:28:28,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 21:28:28,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 823 transitions, 12144 flow. Second operand has 27 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:28,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:28,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 21:28:28,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:30,371 INFO L130 PetriNetUnfolder]: 2364/4476 cut-off events. [2023-08-30 21:28:30,371 INFO L131 PetriNetUnfolder]: For 47452/47453 co-relation queries the response was YES. [2023-08-30 21:28:30,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33723 conditions, 4476 events. 2364/4476 cut-off events. For 47452/47453 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31737 event pairs, 539 based on Foata normal form. 14/4343 useless extension candidates. Maximal degree in co-relation 33626. Up to 4076 conditions per place. [2023-08-30 21:28:30,410 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 770 selfloop transitions, 103 changer transitions 43/917 dead transitions. [2023-08-30 21:28:30,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 917 transitions, 15079 flow [2023-08-30 21:28:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 21:28:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 21:28:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2772 transitions. [2023-08-30 21:28:30,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710843373493976 [2023-08-30 21:28:30,413 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2772 transitions. [2023-08-30 21:28:30,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2772 transitions. [2023-08-30 21:28:30,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:30,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2772 transitions. [2023-08-30 21:28:30,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 92.4) internal successors, (2772), 30 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:30,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:30,420 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:30,420 INFO L175 Difference]: Start difference. First operand has 275 places, 823 transitions, 12144 flow. Second operand 30 states and 2772 transitions. [2023-08-30 21:28:30,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 917 transitions, 15079 flow [2023-08-30 21:28:30,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 917 transitions, 14860 flow, removed 86 selfloop flow, removed 10 redundant places. [2023-08-30 21:28:30,736 INFO L231 Difference]: Finished difference. Result has 304 places, 829 transitions, 12346 flow [2023-08-30 21:28:30,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=11937, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12346, PETRI_PLACES=304, PETRI_TRANSITIONS=829} [2023-08-30 21:28:30,737 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-08-30 21:28:30,737 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 829 transitions, 12346 flow [2023-08-30 21:28:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:30,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:30,738 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:30,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 21:28:30,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:30,942 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:30,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1175173119, now seen corresponding path program 15 times [2023-08-30 21:28:30,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:30,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222821464] [2023-08-30 21:28:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:31,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:31,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222821464] [2023-08-30 21:28:31,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222821464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:28:31,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631470926] [2023-08-30 21:28:31,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:28:31,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:31,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:28:31,664 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:28:31,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 21:28:31,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:28:31,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:28:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-30 21:28:31,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:28:32,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:28:32,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:28:32,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:32,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-08-30 21:28:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:32,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:28:33,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:33,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 170 [2023-08-30 21:28:33,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:33,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 128 [2023-08-30 21:28:33,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:28:33,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 108 [2023-08-30 21:28:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:28:33,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631470926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:28:33,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:28:33,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-30 21:28:33,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391919890] [2023-08-30 21:28:33,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:28:33,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 21:28:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 21:28:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1320, Unknown=5, NotChecked=0, Total=1560 [2023-08-30 21:28:34,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:28:34,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 829 transitions, 12346 flow. Second operand has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:34,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:34,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:28:34,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:59,073 INFO L130 PetriNetUnfolder]: 2680/5339 cut-off events. [2023-08-30 21:28:59,073 INFO L131 PetriNetUnfolder]: For 60881/60882 co-relation queries the response was YES. [2023-08-30 21:28:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40935 conditions, 5339 events. 2680/5339 cut-off events. For 60881/60882 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41455 event pairs, 136 based on Foata normal form. 72/5226 useless extension candidates. Maximal degree in co-relation 40827. Up to 2584 conditions per place. [2023-08-30 21:28:59,130 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 583 selfloop transitions, 548 changer transitions 85/1217 dead transitions. [2023-08-30 21:28:59,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1217 transitions, 19663 flow [2023-08-30 21:28:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 21:28:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 21:28:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4771 transitions. [2023-08-30 21:28:59,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29938504016064255 [2023-08-30 21:28:59,139 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4771 transitions. [2023-08-30 21:28:59,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4771 transitions. [2023-08-30 21:28:59,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:59,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4771 transitions. [2023-08-30 21:28:59,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 74.546875) internal successors, (4771), 64 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:59,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 249.0) internal successors, (16185), 65 states have internal predecessors, (16185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:59,151 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 249.0) internal successors, (16185), 65 states have internal predecessors, (16185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:59,151 INFO L175 Difference]: Start difference. First operand has 304 places, 829 transitions, 12346 flow. Second operand 64 states and 4771 transitions. [2023-08-30 21:28:59,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1217 transitions, 19663 flow [2023-08-30 21:28:59,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1217 transitions, 19157 flow, removed 173 selfloop flow, removed 24 redundant places. [2023-08-30 21:28:59,643 INFO L231 Difference]: Finished difference. Result has 364 places, 940 transitions, 16181 flow [2023-08-30 21:28:59,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=10397, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=16181, PETRI_PLACES=364, PETRI_TRANSITIONS=940} [2023-08-30 21:28:59,644 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 343 predicate places. [2023-08-30 21:28:59,644 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 940 transitions, 16181 flow [2023-08-30 21:28:59,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:28:59,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:59,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:28:59,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-30 21:28:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:59,853 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:28:59,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1538767919, now seen corresponding path program 16 times [2023-08-30 21:28:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646507531] [2023-08-30 21:28:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:00,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:00,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646507531] [2023-08-30 21:29:00,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646507531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:00,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006349406] [2023-08-30 21:29:00,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:29:00,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:00,587 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:00,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 21:29:00,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:29:00,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 21:29:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:01,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:29:01,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:29:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:01,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:01,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:01,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 256 [2023-08-30 21:29:01,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:01,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 201 [2023-08-30 21:29:01,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:01,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 168 [2023-08-30 21:29:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:02,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006349406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:02,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:02,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-30 21:29:02,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891296018] [2023-08-30 21:29:02,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:02,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 21:29:02,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 21:29:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1193, Unknown=9, NotChecked=0, Total=1406 [2023-08-30 21:29:03,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:29:03,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 940 transitions, 16181 flow. Second operand has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:03,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:03,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:29:03,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:04,422 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse17 (* c_~q_front~0 4)) (.cse16 (+ c_~q_back~0 1))) (let ((.cse6 (<= c_~n~0 .cse16)) (.cse5 (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (.cse1 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse8 (+ .cse17 c_~q~0.offset 4)) (.cse9 (+ .cse17 c_~q~0.offset)) (.cse7 (< .cse16 0))) (and (let ((.cse0 (select |c_#memory_int| c_~q~0.base))) (let ((.cse3 (select .cse0 .cse9)) (.cse2 (select .cse0 .cse8))) (or (not (= (select .cse0 .cse1) 1)) (= .cse2 0) (= .cse3 0) (let ((.cse4 (+ c_~s~0 .cse3 .cse2))) (and (< .cse4 .cse5) (< |c_thread1Thread1of1ForFork1_~i~0#1| .cse4))) .cse6 .cse7))) (or .cse6 (and (forall ((v_ArrVal_786 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_786) c_~q~0.base))) (let ((.cse10 (select .cse12 .cse9)) (.cse11 (select .cse12 .cse8))) (or (= .cse10 0) (< (+ c_~s~0 .cse11 .cse10) .cse5) (= .cse11 0) (not (= (select .cse12 .cse1) 1)))))) (forall ((v_ArrVal_786 (Array Int Int))) (let ((.cse15 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_786) c_~q~0.base))) (let ((.cse14 (select .cse15 .cse9)) (.cse13 (select .cse15 .cse8))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 .cse13 .cse14)) (= .cse14 0) (= .cse13 0) (not (= (select .cse15 .cse1) 1))))))) .cse7)))) is different from false [2023-08-30 21:29:12,728 WARN L222 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 80 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:29:19,133 WARN L222 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 92 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:29:25,646 WARN L222 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 88 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:29:32,942 INFO L130 PetriNetUnfolder]: 2735/5412 cut-off events. [2023-08-30 21:29:32,942 INFO L131 PetriNetUnfolder]: For 82552/82553 co-relation queries the response was YES. [2023-08-30 21:29:32,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46327 conditions, 5412 events. 2735/5412 cut-off events. For 82552/82553 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 41966 event pairs, 209 based on Foata normal form. 9/5300 useless extension candidates. Maximal degree in co-relation 46196. Up to 3871 conditions per place. [2023-08-30 21:29:33,004 INFO L137 encePairwiseOnDemand]: 236/249 looper letters, 668 selfloop transitions, 494 changer transitions 29/1192 dead transitions. [2023-08-30 21:29:33,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1192 transitions, 22504 flow [2023-08-30 21:29:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 21:29:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 21:29:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2667 transitions. [2023-08-30 21:29:33,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2975234270414993 [2023-08-30 21:29:33,007 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2667 transitions. [2023-08-30 21:29:33,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2667 transitions. [2023-08-30 21:29:33,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:33,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2667 transitions. [2023-08-30 21:29:33,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 74.08333333333333) internal successors, (2667), 36 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:33,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 249.0) internal successors, (9213), 37 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:33,014 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 249.0) internal successors, (9213), 37 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:33,014 INFO L175 Difference]: Start difference. First operand has 364 places, 940 transitions, 16181 flow. Second operand 36 states and 2667 transitions. [2023-08-30 21:29:33,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1192 transitions, 22504 flow [2023-08-30 21:29:33,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1192 transitions, 21098 flow, removed 661 selfloop flow, removed 23 redundant places. [2023-08-30 21:29:33,847 INFO L231 Difference]: Finished difference. Result has 379 places, 1066 transitions, 19116 flow [2023-08-30 21:29:33,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=15149, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=19116, PETRI_PLACES=379, PETRI_TRANSITIONS=1066} [2023-08-30 21:29:33,848 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 358 predicate places. [2023-08-30 21:29:33,848 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1066 transitions, 19116 flow [2023-08-30 21:29:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:33,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:33,848 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:33,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:34,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 21:29:34,054 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:34,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash -540806737, now seen corresponding path program 17 times [2023-08-30 21:29:34,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:34,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342615376] [2023-08-30 21:29:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:34,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:35,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:35,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342615376] [2023-08-30 21:29:35,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342615376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:35,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858291456] [2023-08-30 21:29:35,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:29:35,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:35,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:35,141 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:35,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 21:29:35,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:29:35,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:35,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 21:29:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:35,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:29:35,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:29:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:29:35,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:36,013 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse7 c_~q~0.offset 4)) (.cse2 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse4 (+ .cse7 c_~q~0.offset))) (and (forall ((v_ArrVal_825 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_825) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse4))) (or (= .cse0 0) (not (= (select .cse1 .cse2) 1)) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 .cse0 (select .cse1 .cse3))))))) (forall ((v_ArrVal_825 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_825) c_~q~0.base))) (let ((.cse5 (select .cse6 .cse4))) (or (< (+ c_~s~0 .cse5 (select .cse6 .cse3)) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (= .cse5 0) (not (= (select .cse6 .cse2) 1))))))))) is different from false [2023-08-30 21:29:36,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:36,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 212 [2023-08-30 21:29:36,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:36,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 164 [2023-08-30 21:29:36,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:36,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 138 [2023-08-30 21:29:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:29:36,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858291456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:36,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:36,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-08-30 21:29:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288240030] [2023-08-30 21:29:36,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:36,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 21:29:36,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 21:29:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=906, Unknown=1, NotChecked=60, Total=1056 [2023-08-30 21:29:36,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-08-30 21:29:36,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1066 transitions, 19116 flow. Second operand has 33 states, 33 states have (on average 67.66666666666667) internal successors, (2233), 33 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:36,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:36,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-08-30 21:29:36,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:45,163 INFO L130 PetriNetUnfolder]: 2248/4501 cut-off events. [2023-08-30 21:29:45,164 INFO L131 PetriNetUnfolder]: For 79807/79808 co-relation queries the response was YES. [2023-08-30 21:29:45,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40656 conditions, 4501 events. 2248/4501 cut-off events. For 79807/79808 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33884 event pairs, 168 based on Foata normal form. 399/4811 useless extension candidates. Maximal degree in co-relation 40522. Up to 1672 conditions per place. [2023-08-30 21:29:45,221 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 347 selfloop transitions, 612 changer transitions 232/1192 dead transitions. [2023-08-30 21:29:45,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1192 transitions, 23084 flow [2023-08-30 21:29:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 21:29:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 21:29:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2752 transitions. [2023-08-30 21:29:45,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2833899701369581 [2023-08-30 21:29:45,225 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2752 transitions. [2023-08-30 21:29:45,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2752 transitions. [2023-08-30 21:29:45,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:45,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2752 transitions. [2023-08-30 21:29:45,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 70.56410256410257) internal successors, (2752), 39 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:45,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 249.0) internal successors, (9960), 40 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:45,239 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 249.0) internal successors, (9960), 40 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:45,239 INFO L175 Difference]: Start difference. First operand has 379 places, 1066 transitions, 19116 flow. Second operand 39 states and 2752 transitions. [2023-08-30 21:29:45,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1192 transitions, 23084 flow [2023-08-30 21:29:45,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1192 transitions, 22503 flow, removed 248 selfloop flow, removed 27 redundant places. [2023-08-30 21:29:45,933 INFO L231 Difference]: Finished difference. Result has 394 places, 873 transitions, 17619 flow [2023-08-30 21:29:45,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=16206, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=17619, PETRI_PLACES=394, PETRI_TRANSITIONS=873} [2023-08-30 21:29:45,934 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 373 predicate places. [2023-08-30 21:29:45,934 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 873 transitions, 17619 flow [2023-08-30 21:29:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 67.66666666666667) internal successors, (2233), 33 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:45,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:45,934 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:45,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:46,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 21:29:46,139 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:29:46,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1730663973, now seen corresponding path program 18 times [2023-08-30 21:29:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:46,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681044441] [2023-08-30 21:29:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:46,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:46,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681044441] [2023-08-30 21:29:46,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681044441] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:46,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388157857] [2023-08-30 21:29:46,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:29:46,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:46,870 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:29:46,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 21:29:46,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:29:46,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-30 21:29:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:29:47,247 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 [2023-08-30 21:29:47,669 INFO L321 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-08-30 21:29:47,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-08-30 21:29:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:48,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:48,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 268 treesize of output 272 [2023-08-30 21:29:48,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:48,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 193 [2023-08-30 21:29:48,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:29:48,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 168 [2023-08-30 21:29:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:51,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388157857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:51,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:51,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-30 21:29:51,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793267258] [2023-08-30 21:29:51,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:51,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 21:29:51,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 21:29:51,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1389, Unknown=1, NotChecked=0, Total=1560 [2023-08-30 21:29:53,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:29:53,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 873 transitions, 17619 flow. Second operand has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:53,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:53,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:29:53,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:30:10,386 WARN L222 SmtUtils]: Spent 16.10s on a formula simplification. DAG size of input: 119 DAG size of output: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:30:17,387 WARN L222 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 121 DAG size of output: 110 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:30:20,841 INFO L130 PetriNetUnfolder]: 1913/3854 cut-off events. [2023-08-30 21:30:20,841 INFO L131 PetriNetUnfolder]: For 77109/77110 co-relation queries the response was YES. [2023-08-30 21:30:20,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37252 conditions, 3854 events. 1913/3854 cut-off events. For 77109/77110 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28018 event pairs, 679 based on Foata normal form. 2/3849 useless extension candidates. Maximal degree in co-relation 37110. Up to 3551 conditions per place. [2023-08-30 21:30:20,882 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 817 selfloop transitions, 124 changer transitions 17/959 dead transitions. [2023-08-30 21:30:20,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 959 transitions, 20772 flow [2023-08-30 21:30:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 21:30:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 21:30:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2178 transitions. [2023-08-30 21:30:20,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29156626506024097 [2023-08-30 21:30:20,885 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2178 transitions. [2023-08-30 21:30:20,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2178 transitions. [2023-08-30 21:30:20,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:30:20,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2178 transitions. [2023-08-30 21:30:20,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 72.6) internal successors, (2178), 30 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:20,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:20,890 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:20,890 INFO L175 Difference]: Start difference. First operand has 394 places, 873 transitions, 17619 flow. Second operand 30 states and 2178 transitions. [2023-08-30 21:30:20,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 959 transitions, 20772 flow [2023-08-30 21:30:21,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 959 transitions, 19858 flow, removed 342 selfloop flow, removed 27 redundant places. [2023-08-30 21:30:21,550 INFO L231 Difference]: Finished difference. Result has 395 places, 902 transitions, 17553 flow [2023-08-30 21:30:21,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=16734, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17553, PETRI_PLACES=395, PETRI_TRANSITIONS=902} [2023-08-30 21:30:21,550 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 374 predicate places. [2023-08-30 21:30:21,550 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 902 transitions, 17553 flow [2023-08-30 21:30:21,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:21,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:30:21,551 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:30:21,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 21:30:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:30:21,756 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:30:21,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:30:21,756 INFO L85 PathProgramCache]: Analyzing trace with hash -451722763, now seen corresponding path program 19 times [2023-08-30 21:30:21,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:30:21,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487262951] [2023-08-30 21:30:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:30:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:30:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:30:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:22,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:30:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487262951] [2023-08-30 21:30:22,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487262951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:30:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743369435] [2023-08-30 21:30:22,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:30:22,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:30:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:30:22,599 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:30:22,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 21:30:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:30:22,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 21:30:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:30:22,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:30:22,908 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 30 treesize of output 30 [2023-08-30 21:30:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:30:23,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:30:23,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:23,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 166 [2023-08-30 21:30:23,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:23,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 102 [2023-08-30 21:30:23,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:23,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 83 [2023-08-30 21:30:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:30:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743369435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:30:23,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:30:23,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-08-30 21:30:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368099616] [2023-08-30 21:30:23,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:30:23,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 21:30:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:30:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 21:30:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=963, Unknown=1, NotChecked=0, Total=1056 [2023-08-30 21:30:25,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:30:25,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 902 transitions, 17553 flow. Second operand has 33 states, 33 states have (on average 70.66666666666667) internal successors, (2332), 33 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:25,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:30:25,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:30:25,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:30:28,573 INFO L130 PetriNetUnfolder]: 1939/3903 cut-off events. [2023-08-30 21:30:28,573 INFO L131 PetriNetUnfolder]: For 68507/68508 co-relation queries the response was YES. [2023-08-30 21:30:28,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36721 conditions, 3903 events. 1939/3903 cut-off events. For 68507/68508 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28331 event pairs, 160 based on Foata normal form. 4/3900 useless extension candidates. Maximal degree in co-relation 36583. Up to 3208 conditions per place. [2023-08-30 21:30:28,616 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 769 selfloop transitions, 190 changer transitions 36/996 dead transitions. [2023-08-30 21:30:28,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 996 transitions, 20654 flow [2023-08-30 21:30:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 21:30:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 21:30:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2281 transitions. [2023-08-30 21:30:28,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2955045990413266 [2023-08-30 21:30:28,618 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2281 transitions. [2023-08-30 21:30:28,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2281 transitions. [2023-08-30 21:30:28,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:30:28,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2281 transitions. [2023-08-30 21:30:28,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 73.58064516129032) internal successors, (2281), 31 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:28,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 249.0) internal successors, (7968), 32 states have internal predecessors, (7968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:28,624 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 249.0) internal successors, (7968), 32 states have internal predecessors, (7968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:28,624 INFO L175 Difference]: Start difference. First operand has 395 places, 902 transitions, 17553 flow. Second operand 31 states and 2281 transitions. [2023-08-30 21:30:28,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 996 transitions, 20654 flow [2023-08-30 21:30:29,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 996 transitions, 20350 flow, removed 119 selfloop flow, removed 13 redundant places. [2023-08-30 21:30:29,156 INFO L231 Difference]: Finished difference. Result has 411 places, 906 transitions, 17813 flow [2023-08-30 21:30:29,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=17246, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17813, PETRI_PLACES=411, PETRI_TRANSITIONS=906} [2023-08-30 21:30:29,157 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 390 predicate places. [2023-08-30 21:30:29,157 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 906 transitions, 17813 flow [2023-08-30 21:30:29,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.66666666666667) internal successors, (2332), 33 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:29,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:30:29,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:30:29,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 21:30:29,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:30:29,363 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:30:29,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:30:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash -999070149, now seen corresponding path program 20 times [2023-08-30 21:30:29,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:30:29,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213320336] [2023-08-30 21:30:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:30:29,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:30:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:30:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:30,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:30:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213320336] [2023-08-30 21:30:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213320336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:30:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340535398] [2023-08-30 21:30:30,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:30:30,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:30:30,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:30:30,300 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:30:30,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 21:30:30,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:30:30,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:30:30,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 77 conjunts are in the unsatisfiable core [2023-08-30 21:30:30,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:30:30,480 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 16 treesize of output 12 [2023-08-30 21:30:30,518 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 [2023-08-30 21:30:30,562 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 [2023-08-30 21:30:30,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:30:30,753 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 30 treesize of output 30 [2023-08-30 21:30:30,974 INFO L321 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-30 21:30:30,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-08-30 21:30:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:31,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:30:32,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:32,741 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 2 case distinctions, treesize of input 183 treesize of output 108 [2023-08-30 21:30:32,783 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:30:32,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 234 [2023-08-30 21:30:32,792 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:30:32,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 113 [2023-08-30 21:30:32,831 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:30:32,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 119 [2023-08-30 21:30:33,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:30:33,855 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 2 case distinctions, treesize of input 183 treesize of output 108 [2023-08-30 21:30:33,860 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:30:33,879 INFO L321 Elim1Store]: treesize reduction 36, result has 20.0 percent of original size [2023-08-30 21:30:33,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 112 [2023-08-30 21:30:33,903 INFO L321 Elim1Store]: treesize reduction 36, result has 20.0 percent of original size [2023-08-30 21:30:33,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 62 [2023-08-30 21:30:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:30:34,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340535398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:30:34,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:30:34,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-30 21:30:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103100217] [2023-08-30 21:30:34,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:30:34,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 21:30:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:30:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 21:30:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1379, Unknown=8, NotChecked=0, Total=1560 [2023-08-30 21:30:36,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-08-30 21:30:36,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 906 transitions, 17813 flow. Second operand has 40 states, 40 states have (on average 67.4) internal successors, (2696), 40 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:30:36,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:30:36,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-08-30 21:30:36,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:30:51,044 WARN L222 SmtUtils]: Spent 13.40s on a formula simplification. DAG size of input: 113 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:31:01,119 WARN L222 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 136 DAG size of output: 132 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:31:08,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:31:12,618 INFO L130 PetriNetUnfolder]: 1926/3852 cut-off events. [2023-08-30 21:31:12,619 INFO L131 PetriNetUnfolder]: For 74620/74621 co-relation queries the response was YES. [2023-08-30 21:31:12,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36731 conditions, 3852 events. 1926/3852 cut-off events. For 74620/74621 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27822 event pairs, 519 based on Foata normal form. 12/3857 useless extension candidates. Maximal degree in co-relation 36588. Up to 3072 conditions per place. [2023-08-30 21:31:12,673 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 768 selfloop transitions, 189 changer transitions 67/1025 dead transitions. [2023-08-30 21:31:12,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1025 transitions, 21344 flow [2023-08-30 21:31:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 21:31:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 21:31:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3152 transitions. [2023-08-30 21:31:12,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2813029897367247 [2023-08-30 21:31:12,677 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3152 transitions. [2023-08-30 21:31:12,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3152 transitions. [2023-08-30 21:31:12,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:12,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3152 transitions. [2023-08-30 21:31:12,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 70.04444444444445) internal successors, (3152), 45 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:12,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 249.0) internal successors, (11454), 46 states have internal predecessors, (11454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:12,702 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 249.0) internal successors, (11454), 46 states have internal predecessors, (11454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:12,702 INFO L175 Difference]: Start difference. First operand has 411 places, 906 transitions, 17813 flow. Second operand 45 states and 3152 transitions. [2023-08-30 21:31:12,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1025 transitions, 21344 flow [2023-08-30 21:31:13,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1025 transitions, 21040 flow, removed 57 selfloop flow, removed 23 redundant places. [2023-08-30 21:31:13,284 INFO L231 Difference]: Finished difference. Result has 428 places, 882 transitions, 17561 flow [2023-08-30 21:31:13,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=17451, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=17561, PETRI_PLACES=428, PETRI_TRANSITIONS=882} [2023-08-30 21:31:13,285 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 407 predicate places. [2023-08-30 21:31:13,285 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 882 transitions, 17561 flow [2023-08-30 21:31:13,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 67.4) internal successors, (2696), 40 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:13,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:13,285 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:13,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 21:31:13,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 21:31:13,491 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:13,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:13,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1480363842, now seen corresponding path program 21 times [2023-08-30 21:31:13,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:13,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108117599] [2023-08-30 21:31:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:13,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:15,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:15,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108117599] [2023-08-30 21:31:15,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108117599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:15,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704096370] [2023-08-30 21:31:15,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:31:15,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:15,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:15,454 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:15,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 21:31:15,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:31:15,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:31:15,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 21:31:15,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:16,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:31:16,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:16,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 62 [2023-08-30 21:31:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:16,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704096370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:16,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:16,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2023-08-30 21:31:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684751405] [2023-08-30 21:31:16,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:31:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:31:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2023-08-30 21:31:18,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 249 [2023-08-30 21:31:18,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 882 transitions, 17561 flow. Second operand has 27 states, 27 states have (on average 88.81481481481481) internal successors, (2398), 27 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:18,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:18,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 249 [2023-08-30 21:31:18,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:31:21,494 INFO L130 PetriNetUnfolder]: 1925/3806 cut-off events. [2023-08-30 21:31:21,494 INFO L131 PetriNetUnfolder]: For 72162/72163 co-relation queries the response was YES. [2023-08-30 21:31:21,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37038 conditions, 3806 events. 1925/3806 cut-off events. For 72162/72163 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26884 event pairs, 391 based on Foata normal form. 6/3805 useless extension candidates. Maximal degree in co-relation 36894. Up to 3261 conditions per place. [2023-08-30 21:31:21,550 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 847 selfloop transitions, 163 changer transitions 6/1017 dead transitions. [2023-08-30 21:31:21,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1017 transitions, 21681 flow [2023-08-30 21:31:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:31:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:31:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2933 transitions. [2023-08-30 21:31:21,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36809738955823296 [2023-08-30 21:31:21,553 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2933 transitions. [2023-08-30 21:31:21,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2933 transitions. [2023-08-30 21:31:21,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:21,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2933 transitions. [2023-08-30 21:31:21,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.65625) internal successors, (2933), 32 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:21,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:21,560 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:21,560 INFO L175 Difference]: Start difference. First operand has 428 places, 882 transitions, 17561 flow. Second operand 32 states and 2933 transitions. [2023-08-30 21:31:21,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1017 transitions, 21681 flow [2023-08-30 21:31:22,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1017 transitions, 21131 flow, removed 127 selfloop flow, removed 32 redundant places. [2023-08-30 21:31:22,251 INFO L231 Difference]: Finished difference. Result has 414 places, 930 transitions, 18618 flow [2023-08-30 21:31:22,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=17010, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=18618, PETRI_PLACES=414, PETRI_TRANSITIONS=930} [2023-08-30 21:31:22,252 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 393 predicate places. [2023-08-30 21:31:22,252 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 930 transitions, 18618 flow [2023-08-30 21:31:22,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 88.81481481481481) internal successors, (2398), 27 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:22,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:22,253 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:22,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 21:31:22,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 21:31:22,456 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:22,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash -100332504, now seen corresponding path program 22 times [2023-08-30 21:31:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:22,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908508196] [2023-08-30 21:31:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:22,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:24,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:24,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908508196] [2023-08-30 21:31:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908508196] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:24,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877264017] [2023-08-30 21:31:24,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:31:24,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:24,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:24,233 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:24,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 21:31:24,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:31:24,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:31:24,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 21:31:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:31:24,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 21:31:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:31:24,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:31:25,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:25,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 170 [2023-08-30 21:31:25,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:25,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 128 [2023-08-30 21:31:25,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:25,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 108 [2023-08-30 21:31:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:25,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877264017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:25,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:25,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 33 [2023-08-30 21:31:25,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489197152] [2023-08-30 21:31:25,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:25,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 21:31:25,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:25,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 21:31:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1088, Unknown=10, NotChecked=0, Total=1190 [2023-08-30 21:31:25,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:31:25,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 930 transitions, 18618 flow. Second operand has 35 states, 35 states have (on average 70.62857142857143) internal successors, (2472), 35 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:25,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:25,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:31:25,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:31:29,011 INFO L130 PetriNetUnfolder]: 1963/3885 cut-off events. [2023-08-30 21:31:29,012 INFO L131 PetriNetUnfolder]: For 72159/72160 co-relation queries the response was YES. [2023-08-30 21:31:29,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37719 conditions, 3885 events. 1963/3885 cut-off events. For 72159/72160 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27525 event pairs, 315 based on Foata normal form. 5/3883 useless extension candidates. Maximal degree in co-relation 37576. Up to 3266 conditions per place. [2023-08-30 21:31:29,054 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 827 selfloop transitions, 183 changer transitions 6/1017 dead transitions. [2023-08-30 21:31:29,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1017 transitions, 21722 flow [2023-08-30 21:31:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:31:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:31:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2129 transitions. [2023-08-30 21:31:29,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29483451045561554 [2023-08-30 21:31:29,057 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2129 transitions. [2023-08-30 21:31:29,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2129 transitions. [2023-08-30 21:31:29,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:29,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2129 transitions. [2023-08-30 21:31:29,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 73.41379310344827) internal successors, (2129), 29 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:29,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:29,088 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:29,088 INFO L175 Difference]: Start difference. First operand has 414 places, 930 transitions, 18618 flow. Second operand 29 states and 2129 transitions. [2023-08-30 21:31:29,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1017 transitions, 21722 flow [2023-08-30 21:31:29,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1017 transitions, 21560 flow, removed 44 selfloop flow, removed 13 redundant places. [2023-08-30 21:31:29,726 INFO L231 Difference]: Finished difference. Result has 433 places, 944 transitions, 19163 flow [2023-08-30 21:31:29,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=18456, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=19163, PETRI_PLACES=433, PETRI_TRANSITIONS=944} [2023-08-30 21:31:29,728 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 412 predicate places. [2023-08-30 21:31:29,728 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 944 transitions, 19163 flow [2023-08-30 21:31:29,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 70.62857142857143) internal successors, (2472), 35 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:29,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:29,729 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:29,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 21:31:29,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 21:31:29,930 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:29,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash -578806920, now seen corresponding path program 23 times [2023-08-30 21:31:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:29,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010473269] [2023-08-30 21:31:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:29,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:31,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010473269] [2023-08-30 21:31:31,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010473269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:31,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306615371] [2023-08-30 21:31:31,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:31:31,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:31,645 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:31,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 21:31:31,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:31:31,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:31:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 21:31:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:31:32,233 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 30 treesize of output 30 [2023-08-30 21:31:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:31:32,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:31:32,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:32,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 210 [2023-08-30 21:31:33,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:33,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 139 [2023-08-30 21:31:33,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:33,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 113 [2023-08-30 21:31:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:33,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306615371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:33,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:33,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-08-30 21:31:33,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032779455] [2023-08-30 21:31:33,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:33,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 21:31:33,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:33,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 21:31:33,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1161, Unknown=1, NotChecked=0, Total=1260 [2023-08-30 21:31:34,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:31:34,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 944 transitions, 19163 flow. Second operand has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:34,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:34,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:31:34,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:31:38,058 INFO L130 PetriNetUnfolder]: 1990/3954 cut-off events. [2023-08-30 21:31:38,058 INFO L131 PetriNetUnfolder]: For 75042/75043 co-relation queries the response was YES. [2023-08-30 21:31:38,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38636 conditions, 3954 events. 1990/3954 cut-off events. For 75042/75043 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28306 event pairs, 180 based on Foata normal form. 3/3950 useless extension candidates. Maximal degree in co-relation 38489. Up to 3231 conditions per place. [2023-08-30 21:31:38,111 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 817 selfloop transitions, 193 changer transitions 4/1015 dead transitions. [2023-08-30 21:31:38,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1015 transitions, 21984 flow [2023-08-30 21:31:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:31:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:31:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1909 transitions. [2023-08-30 21:31:38,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2948717948717949 [2023-08-30 21:31:38,114 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1909 transitions. [2023-08-30 21:31:38,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1909 transitions. [2023-08-30 21:31:38,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:38,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1909 transitions. [2023-08-30 21:31:38,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.42307692307692) internal successors, (1909), 26 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:38,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:38,118 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:38,118 INFO L175 Difference]: Start difference. First operand has 433 places, 944 transitions, 19163 flow. Second operand 26 states and 1909 transitions. [2023-08-30 21:31:38,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1015 transitions, 21984 flow [2023-08-30 21:31:38,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1015 transitions, 21783 flow, removed 31 selfloop flow, removed 15 redundant places. [2023-08-30 21:31:38,857 INFO L231 Difference]: Finished difference. Result has 446 places, 951 transitions, 19538 flow [2023-08-30 21:31:38,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=18962, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=19538, PETRI_PLACES=446, PETRI_TRANSITIONS=951} [2023-08-30 21:31:38,858 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 425 predicate places. [2023-08-30 21:31:38,859 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 951 transitions, 19538 flow [2023-08-30 21:31:38,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:38,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:38,859 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:38,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 21:31:39,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:39,061 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:39,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:39,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1786769000, now seen corresponding path program 24 times [2023-08-30 21:31:39,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:39,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403979810] [2023-08-30 21:31:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:40,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:40,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403979810] [2023-08-30 21:31:40,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403979810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:40,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841235836] [2023-08-30 21:31:40,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:31:40,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:40,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:40,365 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:40,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 21:31:40,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:31:40,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:31:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 21:31:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:40,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:31:40,749 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 30 treesize of output 30 [2023-08-30 21:31:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:31:40,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:31:41,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:41,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 124 [2023-08-30 21:31:41,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:41,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-08-30 21:31:41,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:41,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2023-08-30 21:31:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:41,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841235836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:41,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:41,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-08-30 21:31:41,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456092116] [2023-08-30 21:31:41,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:41,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 21:31:41,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 21:31:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1154, Unknown=1, NotChecked=0, Total=1260 [2023-08-30 21:31:41,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-30 21:31:41,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 951 transitions, 19538 flow. Second operand has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:41,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:41,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-30 21:31:41,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:31:45,446 INFO L130 PetriNetUnfolder]: 2099/4192 cut-off events. [2023-08-30 21:31:45,446 INFO L131 PetriNetUnfolder]: For 81908/81909 co-relation queries the response was YES. [2023-08-30 21:31:45,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41383 conditions, 4192 events. 2099/4192 cut-off events. For 81908/81909 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30615 event pairs, 186 based on Foata normal form. 4/4189 useless extension candidates. Maximal degree in co-relation 41232. Up to 3181 conditions per place. [2023-08-30 21:31:45,495 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 812 selfloop transitions, 253 changer transitions 27/1093 dead transitions. [2023-08-30 21:31:45,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1093 transitions, 23637 flow [2023-08-30 21:31:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 21:31:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 21:31:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2506 transitions. [2023-08-30 21:31:45,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2960075596503662 [2023-08-30 21:31:45,498 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2506 transitions. [2023-08-30 21:31:45,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2506 transitions. [2023-08-30 21:31:45,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:45,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2506 transitions. [2023-08-30 21:31:45,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 73.70588235294117) internal successors, (2506), 34 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:45,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:45,504 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:45,504 INFO L175 Difference]: Start difference. First operand has 446 places, 951 transitions, 19538 flow. Second operand 34 states and 2506 transitions. [2023-08-30 21:31:45,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1093 transitions, 23637 flow [2023-08-30 21:31:46,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1093 transitions, 23408 flow, removed 23 selfloop flow, removed 18 redundant places. [2023-08-30 21:31:46,128 INFO L231 Difference]: Finished difference. Result has 468 places, 993 transitions, 20695 flow [2023-08-30 21:31:46,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=19335, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20695, PETRI_PLACES=468, PETRI_TRANSITIONS=993} [2023-08-30 21:31:46,129 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 447 predicate places. [2023-08-30 21:31:46,129 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 993 transitions, 20695 flow [2023-08-30 21:31:46,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:46,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:46,129 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:46,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 21:31:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:46,334 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:46,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1439724105, now seen corresponding path program 25 times [2023-08-30 21:31:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:46,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342509273] [2023-08-30 21:31:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:46,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342509273] [2023-08-30 21:31:46,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342509273] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071298620] [2023-08-30 21:31:46,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:31:46,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:46,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:46,421 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:46,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 21:31:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:46,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:31:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:46,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:31:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:46,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071298620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:46,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:46,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2023-08-30 21:31:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741995603] [2023-08-30 21:31:46,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:46,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:31:46,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:46,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:31:46,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:31:46,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 249 [2023-08-30 21:31:46,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 993 transitions, 20695 flow. Second operand has 14 states, 14 states have (on average 108.57142857142857) internal successors, (1520), 14 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:46,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:46,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 249 [2023-08-30 21:31:46,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:31:48,791 INFO L130 PetriNetUnfolder]: 2701/5388 cut-off events. [2023-08-30 21:31:48,792 INFO L131 PetriNetUnfolder]: For 107123/107138 co-relation queries the response was YES. [2023-08-30 21:31:48,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52509 conditions, 5388 events. 2701/5388 cut-off events. For 107123/107138 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 41694 event pairs, 211 based on Foata normal form. 154/5526 useless extension candidates. Maximal degree in co-relation 52352. Up to 2044 conditions per place. [2023-08-30 21:31:48,855 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 368 selfloop transitions, 786 changer transitions 126/1288 dead transitions. [2023-08-30 21:31:48,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1288 transitions, 28053 flow [2023-08-30 21:31:48,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:31:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:31:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 695 transitions. [2023-08-30 21:31:48,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46519410977242304 [2023-08-30 21:31:48,856 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 695 transitions. [2023-08-30 21:31:48,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 695 transitions. [2023-08-30 21:31:48,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:48,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 695 transitions. [2023-08-30 21:31:48,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.83333333333333) internal successors, (695), 6 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:48,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:48,858 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:48,858 INFO L175 Difference]: Start difference. First operand has 468 places, 993 transitions, 20695 flow. Second operand 6 states and 695 transitions. [2023-08-30 21:31:48,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1288 transitions, 28053 flow [2023-08-30 21:31:49,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1288 transitions, 27771 flow, removed 42 selfloop flow, removed 21 redundant places. [2023-08-30 21:31:49,703 INFO L231 Difference]: Finished difference. Result has 453 places, 1130 transitions, 25548 flow [2023-08-30 21:31:49,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=19873, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=25548, PETRI_PLACES=453, PETRI_TRANSITIONS=1130} [2023-08-30 21:31:49,704 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 432 predicate places. [2023-08-30 21:31:49,704 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1130 transitions, 25548 flow [2023-08-30 21:31:49,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.57142857142857) internal successors, (1520), 14 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:49,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:49,705 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:49,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 21:31:49,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:49,909 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:49,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:49,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1880686406, now seen corresponding path program 26 times [2023-08-30 21:31:49,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:49,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847572124] [2023-08-30 21:31:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:49,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:31:50,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:50,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847572124] [2023-08-30 21:31:50,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847572124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:50,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137501252] [2023-08-30 21:31:50,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:31:50,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:50,093 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:50,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 21:31:50,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:31:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:31:50,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:31:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:31:50,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:31:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:31:50,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137501252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:50,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 21:31:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878817927] [2023-08-30 21:31:50,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:50,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:31:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:31:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2023-08-30 21:31:50,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 249 [2023-08-30 21:31:50,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1130 transitions, 25548 flow. Second operand has 24 states, 24 states have (on average 103.83333333333333) internal successors, (2492), 24 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:50,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:50,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 249 [2023-08-30 21:31:50,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:31:51,451 INFO L130 PetriNetUnfolder]: 730/1519 cut-off events. [2023-08-30 21:31:51,452 INFO L131 PetriNetUnfolder]: For 43093/43108 co-relation queries the response was YES. [2023-08-30 21:31:51,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18276 conditions, 1519 events. 730/1519 cut-off events. For 43093/43108 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9234 event pairs, 217 based on Foata normal form. 88/1603 useless extension candidates. Maximal degree in co-relation 18120. Up to 1239 conditions per place. [2023-08-30 21:31:51,472 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 289 selfloop transitions, 5 changer transitions 101/401 dead transitions. [2023-08-30 21:31:51,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 401 transitions, 10742 flow [2023-08-30 21:31:51,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 21:31:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 21:31:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1061 transitions. [2023-08-30 21:31:51,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42610441767068274 [2023-08-30 21:31:51,474 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1061 transitions. [2023-08-30 21:31:51,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1061 transitions. [2023-08-30 21:31:51,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:51,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1061 transitions. [2023-08-30 21:31:51,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.1) internal successors, (1061), 10 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:51,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:51,476 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:51,476 INFO L175 Difference]: Start difference. First operand has 453 places, 1130 transitions, 25548 flow. Second operand 10 states and 1061 transitions. [2023-08-30 21:31:51,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 401 transitions, 10742 flow [2023-08-30 21:31:51,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 401 transitions, 8841 flow, removed 244 selfloop flow, removed 67 redundant places. [2023-08-30 21:31:51,794 INFO L231 Difference]: Finished difference. Result has 306 places, 300 transitions, 6098 flow [2023-08-30 21:31:51,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7931, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6098, PETRI_PLACES=306, PETRI_TRANSITIONS=300} [2023-08-30 21:31:51,795 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2023-08-30 21:31:51,795 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 300 transitions, 6098 flow [2023-08-30 21:31:51,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 103.83333333333333) internal successors, (2492), 24 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:51,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:51,796 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:51,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 21:31:52,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 21:31:52,000 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:52,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:52,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1360707762, now seen corresponding path program 27 times [2023-08-30 21:31:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:52,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957303947] [2023-08-30 21:31:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:52,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:52,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:52,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957303947] [2023-08-30 21:31:52,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957303947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281065716] [2023-08-30 21:31:52,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:31:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:52,499 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:52,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 21:31:52,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:31:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:31:52,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:31:52,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:52,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:31:52,835 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 21:31:52,835 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 26 treesize of output 14 [2023-08-30 21:31:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281065716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:52,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 22 [2023-08-30 21:31:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650041115] [2023-08-30 21:31:52,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:31:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:31:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:31:53,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 249 [2023-08-30 21:31:53,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 300 transitions, 6098 flow. Second operand has 23 states, 23 states have (on average 98.0) internal successors, (2254), 23 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) [2023-08-30 21:31:53,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:53,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 249 [2023-08-30 21:31:53,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:31:55,228 INFO L130 PetriNetUnfolder]: 1284/2367 cut-off events. [2023-08-30 21:31:55,228 INFO L131 PetriNetUnfolder]: For 36943/36952 co-relation queries the response was YES. [2023-08-30 21:31:55,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21473 conditions, 2367 events. 1284/2367 cut-off events. For 36943/36952 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13869 event pairs, 40 based on Foata normal form. 127/2453 useless extension candidates. Maximal degree in co-relation 21358. Up to 1235 conditions per place. [2023-08-30 21:31:55,249 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 280 selfloop transitions, 366 changer transitions 2/654 dead transitions. [2023-08-30 21:31:55,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 654 transitions, 12034 flow [2023-08-30 21:31:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 21:31:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 21:31:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4199 transitions. [2023-08-30 21:31:55,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41130375159173277 [2023-08-30 21:31:55,252 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4199 transitions. [2023-08-30 21:31:55,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4199 transitions. [2023-08-30 21:31:55,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:31:55,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4199 transitions. [2023-08-30 21:31:55,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 102.41463414634147) internal successors, (4199), 41 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:55,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 249.0) internal successors, (10458), 42 states have internal predecessors, (10458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:55,259 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 249.0) internal successors, (10458), 42 states have internal predecessors, (10458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:55,259 INFO L175 Difference]: Start difference. First operand has 306 places, 300 transitions, 6098 flow. Second operand 41 states and 4199 transitions. [2023-08-30 21:31:55,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 654 transitions, 12034 flow [2023-08-30 21:31:55,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 654 transitions, 10616 flow, removed 498 selfloop flow, removed 29 redundant places. [2023-08-30 21:31:55,405 INFO L231 Difference]: Finished difference. Result has 262 places, 456 transitions, 8788 flow [2023-08-30 21:31:55,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8788, PETRI_PLACES=262, PETRI_TRANSITIONS=456} [2023-08-30 21:31:55,406 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-08-30 21:31:55,406 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 456 transitions, 8788 flow [2023-08-30 21:31:55,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 98.0) internal successors, (2254), 23 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) [2023-08-30 21:31:55,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:31:55,407 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:31:55,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 21:31:55,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:55,611 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:31:55,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:31:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash 789181330, now seen corresponding path program 28 times [2023-08-30 21:31:55,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:31:55,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719156080] [2023-08-30 21:31:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:31:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:31:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:31:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:31:56,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:31:56,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719156080] [2023-08-30 21:31:56,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719156080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:31:56,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660576179] [2023-08-30 21:31:56,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:31:56,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:31:56,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:31:56,279 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:31:56,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 21:31:56,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:31:56,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:31:56,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 21:31:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:31:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:31:56,541 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 [2023-08-30 21:31:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:56,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:31:56,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:31:56,767 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 47 treesize of output 40 [2023-08-30 21:31:56,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 21:31:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:31:56,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660576179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:31:56,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:31:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 30 [2023-08-30 21:31:56,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363910929] [2023-08-30 21:31:56,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:31:56,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 21:31:56,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:31:56,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 21:31:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=845, Unknown=6, NotChecked=0, Total=930 [2023-08-30 21:31:58,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 21:31:58,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 456 transitions, 8788 flow. Second operand has 31 states, 31 states have (on average 93.70967741935483) internal successors, (2905), 31 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:31:58,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:31:58,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 21:31:58,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:32:02,592 INFO L130 PetriNetUnfolder]: 1934/3557 cut-off events. [2023-08-30 21:32:02,593 INFO L131 PetriNetUnfolder]: For 48716/48725 co-relation queries the response was YES. [2023-08-30 21:32:02,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32870 conditions, 3557 events. 1934/3557 cut-off events. For 48716/48725 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 21969 event pairs, 16 based on Foata normal form. 199/3603 useless extension candidates. Maximal degree in co-relation 32758. Up to 2055 conditions per place. [2023-08-30 21:32:02,639 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 288 selfloop transitions, 543 changer transitions 0/837 dead transitions. [2023-08-30 21:32:02,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 837 transitions, 16321 flow [2023-08-30 21:32:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 21:32:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 21:32:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4507 transitions. [2023-08-30 21:32:02,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39348699144403704 [2023-08-30 21:32:02,643 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4507 transitions. [2023-08-30 21:32:02,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4507 transitions. [2023-08-30 21:32:02,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:32:02,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4507 transitions. [2023-08-30 21:32:02,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 97.97826086956522) internal successors, (4507), 46 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:02,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 249.0) internal successors, (11703), 47 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:02,651 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 249.0) internal successors, (11703), 47 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:02,651 INFO L175 Difference]: Start difference. First operand has 262 places, 456 transitions, 8788 flow. Second operand 46 states and 4507 transitions. [2023-08-30 21:32:02,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 837 transitions, 16321 flow [2023-08-30 21:32:02,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 837 transitions, 13527 flow, removed 1113 selfloop flow, removed 15 redundant places. [2023-08-30 21:32:02,958 INFO L231 Difference]: Finished difference. Result has 304 places, 661 transitions, 11821 flow [2023-08-30 21:32:02,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7226, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=11821, PETRI_PLACES=304, PETRI_TRANSITIONS=661} [2023-08-30 21:32:02,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-08-30 21:32:02,959 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 661 transitions, 11821 flow [2023-08-30 21:32:02,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 93.70967741935483) internal successors, (2905), 31 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:02,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:32:02,960 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:32:02,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 21:32:03,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:32:03,164 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:32:03,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:32:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 668031961, now seen corresponding path program 29 times [2023-08-30 21:32:03,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:32:03,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281856955] [2023-08-30 21:32:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:32:03,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:32:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:32:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:04,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:32:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281856955] [2023-08-30 21:32:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281856955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:32:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420840844] [2023-08-30 21:32:04,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:32:04,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:32:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:32:04,256 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:32:04,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 21:32:04,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:32:04,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:32:04,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-30 21:32:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:32:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:05,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:32:05,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:32:05,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 119 [2023-08-30 21:32:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:05,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420840844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:32:05,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:32:05,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 43 [2023-08-30 21:32:05,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204807544] [2023-08-30 21:32:05,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:32:05,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 21:32:05,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:32:05,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 21:32:05,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 21:32:08,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 249 [2023-08-30 21:32:08,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 661 transitions, 11821 flow. Second operand has 45 states, 45 states have (on average 82.4888888888889) internal successors, (3712), 45 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:08,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:32:08,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 249 [2023-08-30 21:32:08,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:32:11,818 INFO L130 PetriNetUnfolder]: 3029/5528 cut-off events. [2023-08-30 21:32:11,819 INFO L131 PetriNetUnfolder]: For 88705/88705 co-relation queries the response was YES. [2023-08-30 21:32:11,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49003 conditions, 5528 events. 3029/5528 cut-off events. For 88705/88705 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37751 event pairs, 192 based on Foata normal form. 11/5342 useless extension candidates. Maximal degree in co-relation 48882. Up to 3265 conditions per place. [2023-08-30 21:32:11,883 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 627 selfloop transitions, 602 changer transitions 11/1241 dead transitions. [2023-08-30 21:32:11,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1241 transitions, 22759 flow [2023-08-30 21:32:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 21:32:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 21:32:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3210 transitions. [2023-08-30 21:32:11,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.348420709866493 [2023-08-30 21:32:11,887 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3210 transitions. [2023-08-30 21:32:11,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3210 transitions. [2023-08-30 21:32:11,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:32:11,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3210 transitions. [2023-08-30 21:32:11,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 86.75675675675676) internal successors, (3210), 37 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:11,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:11,893 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:11,893 INFO L175 Difference]: Start difference. First operand has 304 places, 661 transitions, 11821 flow. Second operand 37 states and 3210 transitions. [2023-08-30 21:32:11,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1241 transitions, 22759 flow [2023-08-30 21:32:12,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1241 transitions, 20131 flow, removed 1107 selfloop flow, removed 15 redundant places. [2023-08-30 21:32:12,481 INFO L231 Difference]: Finished difference. Result has 341 places, 1082 transitions, 18682 flow [2023-08-30 21:32:12,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=10116, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18682, PETRI_PLACES=341, PETRI_TRANSITIONS=1082} [2023-08-30 21:32:12,482 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 320 predicate places. [2023-08-30 21:32:12,482 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1082 transitions, 18682 flow [2023-08-30 21:32:12,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 82.4888888888889) internal successors, (3712), 45 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:12,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:32:12,483 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:32:12,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-30 21:32:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 21:32:12,687 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:32:12,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:32:12,688 INFO L85 PathProgramCache]: Analyzing trace with hash 258805263, now seen corresponding path program 30 times [2023-08-30 21:32:12,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:32:12,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325810095] [2023-08-30 21:32:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:32:12,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:32:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:32:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:13,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:32:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325810095] [2023-08-30 21:32:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325810095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:32:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980069048] [2023-08-30 21:32:13,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:32:13,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:32:13,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:32:13,721 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:32:13,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 21:32:13,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:32:13,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:32:13,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 84 conjunts are in the unsatisfiable core [2023-08-30 21:32:13,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:32:14,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:32:14,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 10 [2023-08-30 21:32:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:14,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:32:14,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:32:14,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 116 [2023-08-30 21:32:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:15,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980069048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:32:15,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:32:15,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2023-08-30 21:32:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318041213] [2023-08-30 21:32:15,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:32:15,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 21:32:15,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:32:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 21:32:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2023-08-30 21:32:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 249 [2023-08-30 21:32:17,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1082 transitions, 18682 flow. Second operand has 47 states, 47 states have (on average 82.42553191489361) internal successors, (3874), 47 states have internal predecessors, (3874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:17,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:32:17,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 249 [2023-08-30 21:32:17,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:32:25,367 INFO L130 PetriNetUnfolder]: 2595/5073 cut-off events. [2023-08-30 21:32:25,367 INFO L131 PetriNetUnfolder]: For 85895/85895 co-relation queries the response was YES. [2023-08-30 21:32:25,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43719 conditions, 5073 events. 2595/5073 cut-off events. For 85895/85895 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 36655 event pairs, 543 based on Foata normal form. 276/5074 useless extension candidates. Maximal degree in co-relation 43582. Up to 3041 conditions per place. [2023-08-30 21:32:25,428 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 696 selfloop transitions, 339 changer transitions 141/1177 dead transitions. [2023-08-30 21:32:25,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1177 transitions, 21562 flow [2023-08-30 21:32:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-30 21:32:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-30 21:32:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5161 transitions. [2023-08-30 21:32:25,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3454484605087015 [2023-08-30 21:32:25,432 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5161 transitions. [2023-08-30 21:32:25,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5161 transitions. [2023-08-30 21:32:25,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:32:25,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5161 transitions. [2023-08-30 21:32:25,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 86.01666666666667) internal successors, (5161), 60 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:25,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 249.0) internal successors, (15189), 61 states have internal predecessors, (15189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:25,448 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 249.0) internal successors, (15189), 61 states have internal predecessors, (15189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:25,448 INFO L175 Difference]: Start difference. First operand has 341 places, 1082 transitions, 18682 flow. Second operand 60 states and 5161 transitions. [2023-08-30 21:32:25,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1177 transitions, 21562 flow [2023-08-30 21:32:26,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1177 transitions, 20291 flow, removed 580 selfloop flow, removed 18 redundant places. [2023-08-30 21:32:26,083 INFO L231 Difference]: Finished difference. Result has 411 places, 871 transitions, 15933 flow [2023-08-30 21:32:26,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=12750, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15933, PETRI_PLACES=411, PETRI_TRANSITIONS=871} [2023-08-30 21:32:26,084 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 390 predicate places. [2023-08-30 21:32:26,084 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 871 transitions, 15933 flow [2023-08-30 21:32:26,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 82.42553191489361) internal successors, (3874), 47 states have internal predecessors, (3874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:26,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:32:26,085 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:32:26,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 21:32:26,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 21:32:26,290 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:32:26,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:32:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1461322381, now seen corresponding path program 31 times [2023-08-30 21:32:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:32:26,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749144366] [2023-08-30 21:32:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:32:26,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:32:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:32:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:27,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:32:27,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749144366] [2023-08-30 21:32:27,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749144366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:32:27,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547454162] [2023-08-30 21:32:27,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:32:27,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:32:27,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:32:27,317 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:32:27,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 21:32:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:32:27,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-30 21:32:27,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:32:28,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:32:28,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 10 [2023-08-30 21:32:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:28,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:32:28,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:32:28,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 133 treesize of output 122 [2023-08-30 21:32:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:29,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547454162] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:32:29,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:32:29,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 43 [2023-08-30 21:32:29,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128371545] [2023-08-30 21:32:29,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:32:29,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 21:32:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:32:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 21:32:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 21:32:31,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 249 [2023-08-30 21:32:31,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 871 transitions, 15933 flow. Second operand has 45 states, 45 states have (on average 82.4888888888889) internal successors, (3712), 45 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:31,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:32:31,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 249 [2023-08-30 21:32:31,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:32:38,541 INFO L130 PetriNetUnfolder]: 2992/5774 cut-off events. [2023-08-30 21:32:38,541 INFO L131 PetriNetUnfolder]: For 110454/110454 co-relation queries the response was YES. [2023-08-30 21:32:38,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52203 conditions, 5774 events. 2992/5774 cut-off events. For 110454/110454 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 42447 event pairs, 278 based on Foata normal form. 8/5422 useless extension candidates. Maximal degree in co-relation 52039. Up to 3077 conditions per place. [2023-08-30 21:32:38,627 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 690 selfloop transitions, 556 changer transitions 38/1285 dead transitions. [2023-08-30 21:32:38,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1285 transitions, 25074 flow [2023-08-30 21:32:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-30 21:32:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-30 21:32:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5097 transitions. [2023-08-30 21:32:38,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469471104758015 [2023-08-30 21:32:38,658 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5097 transitions. [2023-08-30 21:32:38,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5097 transitions. [2023-08-30 21:32:38,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:32:38,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5097 transitions. [2023-08-30 21:32:38,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 86.38983050847457) internal successors, (5097), 59 states have internal predecessors, (5097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:38,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 249.0) internal successors, (14940), 60 states have internal predecessors, (14940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:38,669 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 249.0) internal successors, (14940), 60 states have internal predecessors, (14940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:38,669 INFO L175 Difference]: Start difference. First operand has 411 places, 871 transitions, 15933 flow. Second operand 59 states and 5097 transitions. [2023-08-30 21:32:38,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1285 transitions, 25074 flow [2023-08-30 21:32:39,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1285 transitions, 23680 flow, removed 636 selfloop flow, removed 28 redundant places. [2023-08-30 21:32:39,760 INFO L231 Difference]: Finished difference. Result has 453 places, 1087 transitions, 21388 flow [2023-08-30 21:32:39,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=14806, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=21388, PETRI_PLACES=453, PETRI_TRANSITIONS=1087} [2023-08-30 21:32:39,761 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 432 predicate places. [2023-08-30 21:32:39,761 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1087 transitions, 21388 flow [2023-08-30 21:32:39,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 82.4888888888889) internal successors, (3712), 45 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:32:39,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:32:39,762 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:32:39,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 21:32:39,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 21:32:39,967 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:32:39,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:32:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -882048269, now seen corresponding path program 32 times [2023-08-30 21:32:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:32:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90424091] [2023-08-30 21:32:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:32:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:32:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:32:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:41,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:32:41,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90424091] [2023-08-30 21:32:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90424091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:32:41,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240351355] [2023-08-30 21:32:41,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:32:41,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:32:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:32:41,306 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:32:41,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 21:32:41,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:32:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:32:41,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-30 21:32:41,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:32:41,499 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 [2023-08-30 21:32:41,542 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 16 treesize of output 12 [2023-08-30 21:32:41,588 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 [2023-08-30 21:32:41,636 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 [2023-08-30 21:32:41,684 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 [2023-08-30 21:32:41,727 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 [2023-08-30 21:32:42,472 INFO L321 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2023-08-30 21:32:42,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 44 [2023-08-30 21:32:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:32:42,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:33:12,339 INFO L321 Elim1Store]: treesize reduction 198, result has 43.6 percent of original size [2023-08-30 21:33:12,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 689 treesize of output 443 [2023-08-30 21:33:12,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:33:12,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1220 treesize of output 1442 [2023-08-30 21:33:12,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:33:12,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 722 treesize of output 769 [2023-08-30 21:33:13,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:33:13,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 648 treesize of output 732 [2023-08-30 21:33:13,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:33:13,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 611 treesize of output 695 [2023-08-30 21:33:13,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:33:13,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 633 treesize of output 873 [2023-08-30 21:33:14,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:33:14,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 537 treesize of output 584 Killed by 15