./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:37:38,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:37:38,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:37:38,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:37:38,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:37:38,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:37:38,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:37:38,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:37:38,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:37:38,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:37:38,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:37:38,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:37:38,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:37:38,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:37:38,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:37:38,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:37:38,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:37:38,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:37:38,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:37:38,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:37:38,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:37:38,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:37:38,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:37:38,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:37:38,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:37:38,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:37:38,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:37:38,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:37:38,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:37:38,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:37:38,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:37:38,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:37:38,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:37:38,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:37:38,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:37:38,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:37:38,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:37:38,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:37:38,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:37:38,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:37:38,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:37:38,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:37:38,097 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:37:38,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:37:38,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:37:38,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:37:38,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:37:38,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:37:38,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:37:38,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:37:38,100 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:37:38,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:37:38,100 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:37:38,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:37:38,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:37:38,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:37:38,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:37:38,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:37:38,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:37:38,102 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:37:38,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:37:38,103 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:37:38,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:37:38,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:37:38,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:37:38,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:37:38,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:37:38,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:37:38,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:37:38,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:37:38,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:37:38,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:37:38,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:37:38,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:37:38,106 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:37:38,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:37:38,106 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:37:38,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:37:38,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:37:38,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:37:38,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:37:38,425 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:37:38,425 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:37:38,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-31 00:37:39,617 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:37:39,792 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:37:39,793 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-31 00:37:39,798 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef13a8529/006e5437bc6f4674abb45d3d2c8d726e/FLAG709cecfe7 [2023-08-31 00:37:39,810 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef13a8529/006e5437bc6f4674abb45d3d2c8d726e [2023-08-31 00:37:39,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:37:39,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:37:39,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:37:39,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:37:39,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:37:39,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:37:39" (1/1) ... [2023-08-31 00:37:39,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d21a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:39, skipping insertion in model container [2023-08-31 00:37:39,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:37:39" (1/1) ... [2023-08-31 00:37:39,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:37:39,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:37:39,988 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/array-eq-symm.wvr.c[2251,2264] [2023-08-31 00:37:40,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:37:40,019 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:37:40,044 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/array-eq-symm.wvr.c[2251,2264] [2023-08-31 00:37:40,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:37:40,071 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:37:40,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40 WrapperNode [2023-08-31 00:37:40,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:37:40,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:37:40,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:37:40,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:37:40,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,127 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 116 [2023-08-31 00:37:40,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:37:40,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:37:40,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:37:40,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:37:40,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,171 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:37:40,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:37:40,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:37:40,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:37:40,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (1/1) ... [2023-08-31 00:37:40,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:37:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:37:40,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:37:40,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:37:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:37:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 00:37:40,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 00:37:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 00:37:40,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 00:37:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:37:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:37:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:37:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 00:37:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:37:40,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:37:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:37:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:37:40,264 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:37:40,375 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:37:40,377 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:37:40,687 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:37:40,695 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:37:40,696 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 00:37:40,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:37:40 BoogieIcfgContainer [2023-08-31 00:37:40,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:37:40,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:37:40,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:37:40,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:37:40,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:37:39" (1/3) ... [2023-08-31 00:37:40,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfc3e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:37:40, skipping insertion in model container [2023-08-31 00:37:40,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:37:40" (2/3) ... [2023-08-31 00:37:40,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfc3e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:37:40, skipping insertion in model container [2023-08-31 00:37:40,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:37:40" (3/3) ... [2023-08-31 00:37:40,710 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-08-31 00:37:40,716 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:37:40,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:37:40,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:37:40,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:37:40,781 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:37:40,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 342 flow [2023-08-31 00:37:40,871 INFO L130 PetriNetUnfolder]: 15/161 cut-off events. [2023-08-31 00:37:40,872 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 00:37:40,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 15/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2023-08-31 00:37:40,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 163 transitions, 342 flow [2023-08-31 00:37:40,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 153 transitions, 318 flow [2023-08-31 00:37:40,886 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:37:40,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 153 transitions, 318 flow [2023-08-31 00:37:40,906 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 153 transitions, 318 flow [2023-08-31 00:37:40,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 153 transitions, 318 flow [2023-08-31 00:37:40,984 INFO L130 PetriNetUnfolder]: 15/153 cut-off events. [2023-08-31 00:37:40,984 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 00:37:40,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 15/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2023-08-31 00:37:40,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-08-31 00:37:45,406 INFO L134 LiptonReduction]: Checked pairs total: 1281 [2023-08-31 00:37:45,406 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-31 00:37:45,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:37:45,424 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;@76771cec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:37:45,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 00:37:45,429 INFO L130 PetriNetUnfolder]: 5/18 cut-off events. [2023-08-31 00:37:45,429 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 00:37:45,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:45,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:45,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:45,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1496650072, now seen corresponding path program 1 times [2023-08-31 00:37:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:45,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205373404] [2023-08-31 00:37:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:45,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:45,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:45,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205373404] [2023-08-31 00:37:45,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205373404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:37:45,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:37:45,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:37:45,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261106242] [2023-08-31 00:37:45,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:45,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:37:45,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:37:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:37:46,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 324 [2023-08-31 00:37:46,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:46,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 324 [2023-08-31 00:37:46,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:46,113 INFO L130 PetriNetUnfolder]: 71/121 cut-off events. [2023-08-31 00:37:46,114 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 00:37:46,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 121 events. 71/121 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 274 event pairs, 15 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-08-31 00:37:46,116 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-08-31 00:37:46,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 145 flow [2023-08-31 00:37:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:37:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:37:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-31 00:37:46,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48662551440329216 [2023-08-31 00:37:46,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-31 00:37:46,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-31 00:37:46,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:46,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-31 00:37:46,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,162 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 50 flow. Second operand 3 states and 473 transitions. [2023-08-31 00:37:46,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 145 flow [2023-08-31 00:37:46,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 00:37:46,166 INFO L231 Difference]: Finished difference. Result has 20 places, 21 transitions, 61 flow [2023-08-31 00:37:46,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=21} [2023-08-31 00:37:46,172 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-31 00:37:46,173 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 21 transitions, 61 flow [2023-08-31 00:37:46,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:46,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:46,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:37:46,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:46,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1210615754, now seen corresponding path program 1 times [2023-08-31 00:37:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319916185] [2023-08-31 00:37:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:46,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:46,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319916185] [2023-08-31 00:37:46,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319916185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:37:46,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:37:46,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:37:46,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338460947] [2023-08-31 00:37:46,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:46,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:37:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:46,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:37:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:37:46,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-08-31 00:37:46,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 21 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:46,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-08-31 00:37:46,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:46,515 INFO L130 PetriNetUnfolder]: 125/225 cut-off events. [2023-08-31 00:37:46,516 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-08-31 00:37:46,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 225 events. 125/225 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 675 event pairs, 71 based on Foata normal form. 16/213 useless extension candidates. Maximal degree in co-relation 200. Up to 122 conditions per place. [2023-08-31 00:37:46,517 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-31 00:37:46,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 186 flow [2023-08-31 00:37:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 00:37:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 00:37:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 585 transitions. [2023-08-31 00:37:46,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2023-08-31 00:37:46,520 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 585 transitions. [2023-08-31 00:37:46,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 585 transitions. [2023-08-31 00:37:46,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:46,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 585 transitions. [2023-08-31 00:37:46,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,527 INFO L175 Difference]: Start difference. First operand has 20 places, 21 transitions, 61 flow. Second operand 4 states and 585 transitions. [2023-08-31 00:37:46,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 186 flow [2023-08-31 00:37:46,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:37:46,528 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 80 flow [2023-08-31 00:37:46,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2023-08-31 00:37:46,529 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-08-31 00:37:46,529 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 80 flow [2023-08-31 00:37:46,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:46,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:46,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:37:46,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:46,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash 991297935, now seen corresponding path program 1 times [2023-08-31 00:37:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:46,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639836155] [2023-08-31 00:37:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:46,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:46,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:46,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639836155] [2023-08-31 00:37:46,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639836155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:37:46,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:37:46,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:37:46,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690758307] [2023-08-31 00:37:46,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:46,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:37:46,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:37:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:37:46,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-08-31 00:37:46,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:46,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-08-31 00:37:46,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:46,780 INFO L130 PetriNetUnfolder]: 81/151 cut-off events. [2023-08-31 00:37:46,780 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-31 00:37:46,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 151 events. 81/151 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 397 event pairs, 45 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 294. Up to 122 conditions per place. [2023-08-31 00:37:46,781 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 20 selfloop transitions, 2 changer transitions 12/34 dead transitions. [2023-08-31 00:37:46,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 174 flow [2023-08-31 00:37:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 00:37:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 00:37:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 581 transitions. [2023-08-31 00:37:46,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44830246913580246 [2023-08-31 00:37:46,784 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 581 transitions. [2023-08-31 00:37:46,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 581 transitions. [2023-08-31 00:37:46,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:46,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 581 transitions. [2023-08-31 00:37:46,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,789 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,789 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 80 flow. Second operand 4 states and 581 transitions. [2023-08-31 00:37:46,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 174 flow [2023-08-31 00:37:46,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 168 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 00:37:46,791 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 74 flow [2023-08-31 00:37:46,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-08-31 00:37:46,791 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-08-31 00:37:46,792 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 74 flow [2023-08-31 00:37:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:46,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:46,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:46,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:37:46,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:46,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:46,793 INFO L85 PathProgramCache]: Analyzing trace with hash -369944271, now seen corresponding path program 1 times [2023-08-31 00:37:46,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:46,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887152133] [2023-08-31 00:37:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:46,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:37:46,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:46,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887152133] [2023-08-31 00:37:46,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887152133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:37:46,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:37:46,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 00:37:46,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179616226] [2023-08-31 00:37:46,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:46,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 00:37:46,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 00:37:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:37:46,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2023-08-31 00:37:46,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 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) [2023-08-31 00:37:46,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:46,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2023-08-31 00:37:46,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:47,051 INFO L130 PetriNetUnfolder]: 150/268 cut-off events. [2023-08-31 00:37:47,051 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-08-31 00:37:47,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 268 events. 150/268 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 851 event pairs, 70 based on Foata normal form. 16/281 useless extension candidates. Maximal degree in co-relation 639. Up to 106 conditions per place. [2023-08-31 00:37:47,056 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-31 00:37:47,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 248 flow [2023-08-31 00:37:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:37:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:37:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-08-31 00:37:47,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2023-08-31 00:37:47,061 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-08-31 00:37:47,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-08-31 00:37:47,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:47,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-08-31 00:37:47,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:47,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:47,068 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:47,068 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 74 flow. Second operand 5 states and 726 transitions. [2023-08-31 00:37:47,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 248 flow [2023-08-31 00:37:47,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 49 transitions, 236 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-31 00:37:47,072 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 103 flow [2023-08-31 00:37:47,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-08-31 00:37:47,073 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-31 00:37:47,073 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 103 flow [2023-08-31 00:37:47,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 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) [2023-08-31 00:37:47,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:47,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:47,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 00:37:47,075 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:47,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:47,075 INFO L85 PathProgramCache]: Analyzing trace with hash 631656796, now seen corresponding path program 1 times [2023-08-31 00:37:47,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:47,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447351595] [2023-08-31 00:37:47,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:47,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:37:47,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:47,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447351595] [2023-08-31 00:37:47,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447351595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:37:47,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:37:47,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 00:37:47,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378419449] [2023-08-31 00:37:47,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:47,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 00:37:47,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:47,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 00:37:47,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:37:47,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2023-08-31 00:37:47,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:47,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:47,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2023-08-31 00:37:47,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:47,335 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-08-31 00:37:47,335 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-31 00:37:47,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 238 events. 132/238 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 712 event pairs, 54 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 603. Up to 113 conditions per place. [2023-08-31 00:37:47,337 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 32 selfloop transitions, 5 changer transitions 10/47 dead transitions. [2023-08-31 00:37:47,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 258 flow [2023-08-31 00:37:47,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:37:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:37:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 724 transitions. [2023-08-31 00:37:47,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469135802469136 [2023-08-31 00:37:47,339 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 724 transitions. [2023-08-31 00:37:47,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 724 transitions. [2023-08-31 00:37:47,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:47,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 724 transitions. [2023-08-31 00:37:47,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:47,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:47,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:47,346 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 103 flow. Second operand 5 states and 724 transitions. [2023-08-31 00:37:47,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 258 flow [2023-08-31 00:37:47,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 00:37:47,348 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 113 flow [2023-08-31 00:37:47,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-31 00:37:47,349 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-08-31 00:37:47,349 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 113 flow [2023-08-31 00:37:47,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:47,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:47,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:47,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:37:47,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:47,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:47,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1758776951, now seen corresponding path program 1 times [2023-08-31 00:37:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:47,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060342667] [2023-08-31 00:37:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:47,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:37:47,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060342667] [2023-08-31 00:37:47,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060342667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791993022] [2023-08-31 00:37:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:47,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:37:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:37:47,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:37:47,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:37:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:47,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 00:37:47,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:37:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:37:47,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:37:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:37:47,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791993022] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:47,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 00:37:47,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-08-31 00:37:47,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021414258] [2023-08-31 00:37:47,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:47,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:37:47,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:37:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-31 00:37:48,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-08-31 00:37:48,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:48,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:48,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-08-31 00:37:48,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:48,157 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2023-08-31 00:37:48,157 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-08-31 00:37:48,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 235 events. 125/235 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 756 event pairs, 41 based on Foata normal form. 10/244 useless extension candidates. Maximal degree in co-relation 629. Up to 85 conditions per place. [2023-08-31 00:37:48,159 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-08-31 00:37:48,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 271 flow [2023-08-31 00:37:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 00:37:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 00:37:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 946 transitions. [2023-08-31 00:37:48,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41710758377425045 [2023-08-31 00:37:48,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 946 transitions. [2023-08-31 00:37:48,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 946 transitions. [2023-08-31 00:37:48,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:48,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 946 transitions. [2023-08-31 00:37:48,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.14285714285714) internal successors, (946), 7 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:48,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:48,173 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:48,173 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 113 flow. Second operand 7 states and 946 transitions. [2023-08-31 00:37:48,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 271 flow [2023-08-31 00:37:48,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 262 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 00:37:48,178 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 136 flow [2023-08-31 00:37:48,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-31 00:37:48,180 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-31 00:37:48,180 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 136 flow [2023-08-31 00:37:48,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:48,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:48,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:48,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:37:48,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 00:37:48,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:48,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash 721061444, now seen corresponding path program 1 times [2023-08-31 00:37:48,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:48,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657246551] [2023-08-31 00:37:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:48,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657246551] [2023-08-31 00:37:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657246551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452372973] [2023-08-31 00:37:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:48,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:37:48,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:37:48,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:37:49,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:37:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:49,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 00:37:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:37:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:49,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:37:49,560 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:37:49,561 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 40 treesize of output 56 [2023-08-31 00:37:49,597 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:37:49,597 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 20 treesize of output 4 [2023-08-31 00:37:49,605 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:37:49,605 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 20 treesize of output 4 [2023-08-31 00:37:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452372973] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:49,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 00:37:49,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2023-08-31 00:37:49,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601407731] [2023-08-31 00:37:49,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 00:37:49,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 00:37:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-31 00:37:50,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:37:50,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:50,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:50,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:37:50,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:50,454 INFO L130 PetriNetUnfolder]: 138/255 cut-off events. [2023-08-31 00:37:50,454 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2023-08-31 00:37:50,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 255 events. 138/255 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 844 event pairs, 30 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 735. Up to 198 conditions per place. [2023-08-31 00:37:50,456 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 29 selfloop transitions, 11 changer transitions 4/44 dead transitions. [2023-08-31 00:37:50,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 278 flow [2023-08-31 00:37:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 00:37:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 00:37:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 954 transitions. [2023-08-31 00:37:50,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2023-08-31 00:37:50,460 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 954 transitions. [2023-08-31 00:37:50,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 954 transitions. [2023-08-31 00:37:50,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:50,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 954 transitions. [2023-08-31 00:37:50,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.25) internal successors, (954), 8 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:50,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:50,475 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:50,475 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 136 flow. Second operand 8 states and 954 transitions. [2023-08-31 00:37:50,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 278 flow [2023-08-31 00:37:50,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 260 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-31 00:37:50,478 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 185 flow [2023-08-31 00:37:50,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-31 00:37:50,478 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-31 00:37:50,479 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 185 flow [2023-08-31 00:37:50,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:50,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:50,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:50,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:37:50,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-31 00:37:50,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:50,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash -867319260, now seen corresponding path program 2 times [2023-08-31 00:37:50,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:50,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997103808] [2023-08-31 00:37:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:50,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997103808] [2023-08-31 00:37:51,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997103808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:51,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353713901] [2023-08-31 00:37:51,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:37:51,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:37:51,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:37:51,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:37:51,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:37:51,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:37:51,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:37:51,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 00:37:51,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:37:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:51,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:37:51,600 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 00:37:51,600 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 47 treesize of output 80 [2023-08-31 00:37:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:51,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353713901] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:51,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 00:37:51,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-08-31 00:37:51,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235329142] [2023-08-31 00:37:51,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:51,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 00:37:51,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 00:37:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-31 00:37:52,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:37:52,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 185 flow. Second operand has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:52,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:52,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:37:52,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:52,339 INFO L130 PetriNetUnfolder]: 133/248 cut-off events. [2023-08-31 00:37:52,339 INFO L131 PetriNetUnfolder]: For 319/319 co-relation queries the response was YES. [2023-08-31 00:37:52,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 248 events. 133/248 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 805 event pairs, 35 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 842. Up to 196 conditions per place. [2023-08-31 00:37:52,341 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 30 selfloop transitions, 10 changer transitions 7/47 dead transitions. [2023-08-31 00:37:52,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 346 flow [2023-08-31 00:37:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 00:37:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 00:37:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 953 transitions. [2023-08-31 00:37:52,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36766975308641975 [2023-08-31 00:37:52,345 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 953 transitions. [2023-08-31 00:37:52,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 953 transitions. [2023-08-31 00:37:52,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:52,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 953 transitions. [2023-08-31 00:37:52,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.125) internal successors, (953), 8 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:52,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:52,353 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:52,353 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 185 flow. Second operand 8 states and 953 transitions. [2023-08-31 00:37:52,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 346 flow [2023-08-31 00:37:52,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 318 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-31 00:37:52,356 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 212 flow [2023-08-31 00:37:52,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-31 00:37:52,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-08-31 00:37:52,357 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 212 flow [2023-08-31 00:37:52,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:52,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:52,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:52,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 00:37:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:37:52,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:52,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1485650043, now seen corresponding path program 1 times [2023-08-31 00:37:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:52,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141481697] [2023-08-31 00:37:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:37:53,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:53,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141481697] [2023-08-31 00:37:53,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141481697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:37:53,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:37:53,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-31 00:37:53,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568253799] [2023-08-31 00:37:53,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:37:53,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 00:37:53,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 00:37:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-31 00:37:53,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-08-31 00:37:53,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 130.88888888888889) internal successors, (1178), 9 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:53,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:53,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-08-31 00:37:53,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:53,612 INFO L130 PetriNetUnfolder]: 126/239 cut-off events. [2023-08-31 00:37:53,612 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2023-08-31 00:37:53,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 239 events. 126/239 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 777 event pairs, 38 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 847. Up to 192 conditions per place. [2023-08-31 00:37:53,614 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 30 selfloop transitions, 8 changer transitions 10/48 dead transitions. [2023-08-31 00:37:53,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 369 flow [2023-08-31 00:37:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:37:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:37:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 685 transitions. [2023-08-31 00:37:53,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228395061728395 [2023-08-31 00:37:53,617 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 685 transitions. [2023-08-31 00:37:53,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 685 transitions. [2023-08-31 00:37:53,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:53,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 685 transitions. [2023-08-31 00:37:53,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:53,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:53,622 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:53,622 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 212 flow. Second operand 5 states and 685 transitions. [2023-08-31 00:37:53,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 369 flow [2023-08-31 00:37:53,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-31 00:37:53,625 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 225 flow [2023-08-31 00:37:53,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-08-31 00:37:53,626 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-31 00:37:53,626 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 225 flow [2023-08-31 00:37:53,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 130.88888888888889) internal successors, (1178), 9 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:53,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:53,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:53,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 00:37:53,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:53,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash -708957346, now seen corresponding path program 3 times [2023-08-31 00:37:53,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:53,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431296293] [2023-08-31 00:37:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:54,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431296293] [2023-08-31 00:37:54,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431296293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861046266] [2023-08-31 00:37:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:37:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:37:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:37:54,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:37:54,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 00:37:54,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 00:37:54,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:37:54,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 00:37:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:37:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:54,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:37:54,457 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:37:54,457 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 40 treesize of output 56 [2023-08-31 00:37:54,481 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:37:54,482 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 20 treesize of output 4 [2023-08-31 00:37:54,489 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:37:54,489 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 20 treesize of output 4 [2023-08-31 00:37:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:54,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861046266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:37:54,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:37:54,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-31 00:37:54,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967312992] [2023-08-31 00:37:54,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:37:54,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 00:37:54,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:54,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 00:37:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-31 00:37:55,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-31 00:37:55,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 225 flow. Second operand has 18 states, 18 states have (on average 113.88888888888889) internal successors, (2050), 18 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:55,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:55,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-31 00:37:55,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:55,875 INFO L130 PetriNetUnfolder]: 135/253 cut-off events. [2023-08-31 00:37:55,875 INFO L131 PetriNetUnfolder]: For 424/424 co-relation queries the response was YES. [2023-08-31 00:37:55,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 253 events. 135/253 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 839 event pairs, 6 based on Foata normal form. 12/264 useless extension candidates. Maximal degree in co-relation 924. Up to 196 conditions per place. [2023-08-31 00:37:55,877 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-08-31 00:37:55,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 371 flow [2023-08-31 00:37:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 00:37:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 00:37:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1051 transitions. [2023-08-31 00:37:55,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604252400548697 [2023-08-31 00:37:55,881 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1051 transitions. [2023-08-31 00:37:55,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1051 transitions. [2023-08-31 00:37:55,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:55,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1051 transitions. [2023-08-31 00:37:55,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:55,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:55,888 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:55,888 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 225 flow. Second operand 9 states and 1051 transitions. [2023-08-31 00:37:55,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 371 flow [2023-08-31 00:37:55,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:37:55,891 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 265 flow [2023-08-31 00:37:55,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=265, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-31 00:37:55,893 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-31 00:37:55,893 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 265 flow [2023-08-31 00:37:55,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 113.88888888888889) internal successors, (2050), 18 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:55,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:55,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:55,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 00:37:56,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:37:56,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:56,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1100878043, now seen corresponding path program 2 times [2023-08-31 00:37:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:56,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990267548] [2023-08-31 00:37:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:56,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:37:56,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:56,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990267548] [2023-08-31 00:37:56,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990267548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949475764] [2023-08-31 00:37:56,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:37:56,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:37:56,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:37:56,391 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) [2023-08-31 00:37:56,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 00:37:56,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:37:56,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:37:56,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 00:37:56,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:37:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:37:56,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:37:56,687 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:37:56,687 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 40 treesize of output 56 [2023-08-31 00:37:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:37:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949475764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:37:56,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:37:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-08-31 00:37:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075813708] [2023-08-31 00:37:56,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:37:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 00:37:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:37:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 00:37:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:37:56,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:37:57,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:57,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:37:57,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:37:57,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:37:57,128 INFO L130 PetriNetUnfolder]: 141/263 cut-off events. [2023-08-31 00:37:57,128 INFO L131 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2023-08-31 00:37:57,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 263 events. 141/263 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 872 event pairs, 49 based on Foata normal form. 4/267 useless extension candidates. Maximal degree in co-relation 1045. Up to 230 conditions per place. [2023-08-31 00:37:57,131 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 33 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2023-08-31 00:37:57,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 385 flow [2023-08-31 00:37:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:37:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:37:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 686 transitions. [2023-08-31 00:37:57,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42345679012345677 [2023-08-31 00:37:57,133 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 686 transitions. [2023-08-31 00:37:57,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 686 transitions. [2023-08-31 00:37:57,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:37:57,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 686 transitions. [2023-08-31 00:37:57,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:57,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:57,137 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:57,137 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 265 flow. Second operand 5 states and 686 transitions. [2023-08-31 00:37:57,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 385 flow [2023-08-31 00:37:57,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 00:37:57,140 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 274 flow [2023-08-31 00:37:57,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-08-31 00:37:57,141 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-08-31 00:37:57,141 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 274 flow [2023-08-31 00:37:57,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:37:57,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:37:57,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:37:57,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 00:37:57,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-31 00:37:57,350 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:37:57,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:37:57,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2141083410, now seen corresponding path program 4 times [2023-08-31 00:37:57,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:37:57,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584176695] [2023-08-31 00:37:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:37:57,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:37:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:37:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:37:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:37:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584176695] [2023-08-31 00:37:57,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584176695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:37:57,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752947688] [2023-08-31 00:37:57,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:37:57,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:37:57,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:37:57,973 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) [2023-08-31 00:37:57,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 00:37:58,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:37:58,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:37:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 00:37:58,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:37:58,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 00:37:58,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:37:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:37:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:37:58,399 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 00:37:58,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-08-31 00:37:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:37:58,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:37:58,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:37:58,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-08-31 00:37:58,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:37:58,729 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 102 treesize of output 82 [2023-08-31 00:37:58,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:37:58,737 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 70 treesize of output 55 [2023-08-31 00:37:58,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:37:58,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 70 [2023-08-31 00:37:58,830 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-31 00:37:58,831 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 508 treesize of output 473 [2023-08-31 00:37:58,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:37:58,871 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 342 treesize of output 254 [2023-08-31 00:37:58,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:37:58,914 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 316 treesize of output 308 [2023-08-31 00:38:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:38:00,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752947688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:00,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:00,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-08-31 00:38:00,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654510811] [2023-08-31 00:38:00,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:00,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 00:38:00,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:00,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 00:38:00,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=425, Unknown=6, NotChecked=0, Total=506 [2023-08-31 00:38:01,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-08-31 00:38:01,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 274 flow. Second operand has 23 states, 23 states have (on average 81.65217391304348) internal successors, (1878), 23 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:01,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:01,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-08-31 00:38:01,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:01,733 INFO L130 PetriNetUnfolder]: 172/329 cut-off events. [2023-08-31 00:38:01,733 INFO L131 PetriNetUnfolder]: For 819/819 co-relation queries the response was YES. [2023-08-31 00:38:01,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 329 events. 172/329 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1251 event pairs, 6 based on Foata normal form. 20/349 useless extension candidates. Maximal degree in co-relation 1289. Up to 157 conditions per place. [2023-08-31 00:38:01,736 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 45 selfloop transitions, 17 changer transitions 1/63 dead transitions. [2023-08-31 00:38:01,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 515 flow [2023-08-31 00:38:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 00:38:01,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 00:38:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 777 transitions. [2023-08-31 00:38:01,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2664609053497942 [2023-08-31 00:38:01,739 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 777 transitions. [2023-08-31 00:38:01,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 777 transitions. [2023-08-31 00:38:01,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:01,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 777 transitions. [2023-08-31 00:38:01,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.33333333333333) internal successors, (777), 9 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:01,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:01,745 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:01,745 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 274 flow. Second operand 9 states and 777 transitions. [2023-08-31 00:38:01,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 515 flow [2023-08-31 00:38:01,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 497 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 00:38:01,749 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 336 flow [2023-08-31 00:38:01,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=336, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-31 00:38:01,751 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-08-31 00:38:01,751 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 336 flow [2023-08-31 00:38:01,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.65217391304348) internal successors, (1878), 23 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:01,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:01,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:01,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:01,958 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:01,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1109515910, now seen corresponding path program 5 times [2023-08-31 00:38:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522817300] [2023-08-31 00:38:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:02,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:02,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522817300] [2023-08-31 00:38:02,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522817300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:02,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037055255] [2023-08-31 00:38:02,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:38:02,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:02,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:02,401 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) [2023-08-31 00:38:02,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 00:38:02,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:38:02,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:02,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 00:38:02,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:38:02,660 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 14 treesize of output 16 [2023-08-31 00:38:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:02,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:02,888 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((v_ArrVal_369 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369) ~B~0.base) (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|))))) (and (forall ((v_ArrVal_369 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse2 (+ .cse1 ~B~0.offset)))) (not (= (select .cse2 (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|)))))) (or (< c_~i_BA~0 c_~Bn~0) .cse4) (or (< c_~i_BA~0 c_~An~0) .cse4)))) is different from false [2023-08-31 00:38:02,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:38:02,904 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 48 treesize of output 36 [2023-08-31 00:38:02,907 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 [2023-08-31 00:38:02,963 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-31 00:38:02,964 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 146 treesize of output 151 [2023-08-31 00:38:02,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:38:02,983 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 90 treesize of output 92 [2023-08-31 00:38:03,149 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:38:03,150 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 48 treesize of output 24 [2023-08-31 00:38:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:03,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037055255] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:03,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 00:38:03,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-08-31 00:38:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003601910] [2023-08-31 00:38:03,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:38:03,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 00:38:03,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 00:38:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=393, Unknown=1, NotChecked=40, Total=506 [2023-08-31 00:38:03,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-08-31 00:38:03,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 336 flow. Second operand has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:03,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:03,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-08-31 00:38:03,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:11,614 WARN L222 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 61 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:38:12,379 INFO L130 PetriNetUnfolder]: 164/297 cut-off events. [2023-08-31 00:38:12,380 INFO L131 PetriNetUnfolder]: For 1186/1186 co-relation queries the response was YES. [2023-08-31 00:38:12,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 297 events. 164/297 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1008 event pairs, 27 based on Foata normal form. 2/299 useless extension candidates. Maximal degree in co-relation 1381. Up to 271 conditions per place. [2023-08-31 00:38:12,383 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 30 selfloop transitions, 16 changer transitions 3/49 dead transitions. [2023-08-31 00:38:12,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 49 transitions, 476 flow [2023-08-31 00:38:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 00:38:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 00:38:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 879 transitions. [2023-08-31 00:38:12,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712962962962963 [2023-08-31 00:38:12,386 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 879 transitions. [2023-08-31 00:38:12,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 879 transitions. [2023-08-31 00:38:12,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:12,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 879 transitions. [2023-08-31 00:38:12,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.9) internal successors, (879), 10 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:12,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:12,393 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:12,393 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 336 flow. Second operand 10 states and 879 transitions. [2023-08-31 00:38:12,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 49 transitions, 476 flow [2023-08-31 00:38:12,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 432 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-31 00:38:12,397 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 348 flow [2023-08-31 00:38:12,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=348, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-08-31 00:38:12,398 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-08-31 00:38:12,398 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 348 flow [2023-08-31 00:38:12,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:12,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:12,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:12,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:12,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:12,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:12,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1778420361, now seen corresponding path program 3 times [2023-08-31 00:38:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:12,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331781444] [2023-08-31 00:38:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:12,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:12,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331781444] [2023-08-31 00:38:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331781444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382932424] [2023-08-31 00:38:12,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:38:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:12,920 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) [2023-08-31 00:38:12,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 00:38:13,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 00:38:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 00:38:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:13,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:13,176 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:38:13,176 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 40 treesize of output 56 [2023-08-31 00:38:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:13,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382932424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:13,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:13,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-08-31 00:38:13,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809592889] [2023-08-31 00:38:13,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:13,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 00:38:13,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 00:38:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:38:13,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:38:13,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 348 flow. Second operand has 11 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:13,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:13,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:38:13,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:13,688 INFO L130 PetriNetUnfolder]: 168/301 cut-off events. [2023-08-31 00:38:13,688 INFO L131 PetriNetUnfolder]: For 953/953 co-relation queries the response was YES. [2023-08-31 00:38:13,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 301 events. 168/301 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1028 event pairs, 24 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 1402. Up to 225 conditions per place. [2023-08-31 00:38:13,691 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 43 selfloop transitions, 13 changer transitions 0/56 dead transitions. [2023-08-31 00:38:13,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 541 flow [2023-08-31 00:38:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:38:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:38:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 821 transitions. [2023-08-31 00:38:13,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42232510288065844 [2023-08-31 00:38:13,694 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 821 transitions. [2023-08-31 00:38:13,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 821 transitions. [2023-08-31 00:38:13,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:13,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 821 transitions. [2023-08-31 00:38:13,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.83333333333334) internal successors, (821), 6 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:13,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:13,698 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:13,698 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 348 flow. Second operand 6 states and 821 transitions. [2023-08-31 00:38:13,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 541 flow [2023-08-31 00:38:13,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 505 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-08-31 00:38:13,702 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 352 flow [2023-08-31 00:38:13,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-08-31 00:38:13,703 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-08-31 00:38:13,703 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 352 flow [2023-08-31 00:38:13,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:13,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:13,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:13,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:13,913 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,SelfDestructingSolverStorable13 [2023-08-31 00:38:13,913 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:13,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:13,913 INFO L85 PathProgramCache]: Analyzing trace with hash -292123197, now seen corresponding path program 4 times [2023-08-31 00:38:13,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:13,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447595243] [2023-08-31 00:38:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:13,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447595243] [2023-08-31 00:38:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447595243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614096204] [2023-08-31 00:38:14,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:38:14,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:14,253 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) [2023-08-31 00:38:14,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 00:38:14,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:38:14,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:14,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 00:38:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:38:14,488 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 14 treesize of output 16 [2023-08-31 00:38:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:14,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:14,594 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_446 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (= (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2023-08-31 00:38:14,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:38:14,634 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 148 treesize of output 168 [2023-08-31 00:38:14,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:38:14,657 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 84 treesize of output 86 [2023-08-31 00:38:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:15,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614096204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:15,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:15,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-08-31 00:38:15,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345518233] [2023-08-31 00:38:15,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:15,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 00:38:15,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 00:38:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=220, Unknown=1, NotChecked=30, Total=306 [2023-08-31 00:38:15,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-08-31 00:38:15,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 352 flow. Second operand has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:15,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:15,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-08-31 00:38:15,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:15,575 INFO L130 PetriNetUnfolder]: 158/281 cut-off events. [2023-08-31 00:38:15,575 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-08-31 00:38:15,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 281 events. 158/281 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 912 event pairs, 40 based on Foata normal form. 4/285 useless extension candidates. Maximal degree in co-relation 1347. Up to 243 conditions per place. [2023-08-31 00:38:15,578 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 38 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2023-08-31 00:38:15,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 492 flow [2023-08-31 00:38:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:38:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:38:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-08-31 00:38:15,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508230452674897 [2023-08-31 00:38:15,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-08-31 00:38:15,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-08-31 00:38:15,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:15,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-08-31 00:38:15,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:15,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:15,585 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:15,585 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 352 flow. Second operand 6 states and 682 transitions. [2023-08-31 00:38:15,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 492 flow [2023-08-31 00:38:15,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 446 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-31 00:38:15,589 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 337 flow [2023-08-31 00:38:15,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-08-31 00:38:15,589 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-08-31 00:38:15,589 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 337 flow [2023-08-31 00:38:15,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:15,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:15,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:15,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:15,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 00:38:15,796 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:15,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:15,797 INFO L85 PathProgramCache]: Analyzing trace with hash -705701550, now seen corresponding path program 1 times [2023-08-31 00:38:15,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:15,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948703209] [2023-08-31 00:38:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:15,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:15,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948703209] [2023-08-31 00:38:15,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948703209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137534230] [2023-08-31 00:38:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:15,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:15,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:15,908 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) [2023-08-31 00:38:15,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 00:38:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 00:38:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:16,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:16,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137534230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:16,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:16,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-31 00:38:16,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7105353] [2023-08-31 00:38:16,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:16,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:38:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:38:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:38:16,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-08-31 00:38:16,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 150.28571428571428) internal successors, (1052), 7 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:16,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:16,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-08-31 00:38:16,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:16,344 INFO L130 PetriNetUnfolder]: 260/474 cut-off events. [2023-08-31 00:38:16,345 INFO L131 PetriNetUnfolder]: For 1455/1455 co-relation queries the response was YES. [2023-08-31 00:38:16,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 474 events. 260/474 cut-off events. For 1455/1455 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1864 event pairs, 14 based on Foata normal form. 4/478 useless extension candidates. Maximal degree in co-relation 2165. Up to 224 conditions per place. [2023-08-31 00:38:16,349 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 67 selfloop transitions, 17 changer transitions 2/86 dead transitions. [2023-08-31 00:38:16,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 756 flow [2023-08-31 00:38:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 00:38:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 00:38:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1083 transitions. [2023-08-31 00:38:16,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775132275132275 [2023-08-31 00:38:16,352 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1083 transitions. [2023-08-31 00:38:16,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1083 transitions. [2023-08-31 00:38:16,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:16,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1083 transitions. [2023-08-31 00:38:16,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.71428571428572) internal successors, (1083), 7 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:16,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:16,358 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:16,358 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 337 flow. Second operand 7 states and 1083 transitions. [2023-08-31 00:38:16,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 756 flow [2023-08-31 00:38:16,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 727 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-31 00:38:16,363 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 431 flow [2023-08-31 00:38:16,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-08-31 00:38:16,363 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-08-31 00:38:16,364 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 431 flow [2023-08-31 00:38:16,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.28571428571428) internal successors, (1052), 7 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:16,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:16,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:16,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-31 00:38:16,570 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,SelfDestructingSolverStorable15 [2023-08-31 00:38:16,570 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:16,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:16,571 INFO L85 PathProgramCache]: Analyzing trace with hash -113070510, now seen corresponding path program 2 times [2023-08-31 00:38:16,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:16,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981608249] [2023-08-31 00:38:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:16,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981608249] [2023-08-31 00:38:16,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981608249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214464027] [2023-08-31 00:38:16,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:38:16,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:16,672 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) [2023-08-31 00:38:16,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 00:38:16,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:38:16,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 00:38:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:16,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 00:38:16,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214464027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:16,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:16,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-31 00:38:16,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252561326] [2023-08-31 00:38:16,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:16,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:38:16,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:38:16,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:38:16,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-08-31 00:38:16,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 431 flow. Second operand has 7 states, 7 states have (on average 150.28571428571428) internal successors, (1052), 7 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:16,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:16,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-08-31 00:38:16,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:17,142 INFO L130 PetriNetUnfolder]: 380/690 cut-off events. [2023-08-31 00:38:17,143 INFO L131 PetriNetUnfolder]: For 2640/2640 co-relation queries the response was YES. [2023-08-31 00:38:17,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3367 conditions, 690 events. 380/690 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3052 event pairs, 74 based on Foata normal form. 4/694 useless extension candidates. Maximal degree in co-relation 3330. Up to 474 conditions per place. [2023-08-31 00:38:17,148 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 71 selfloop transitions, 18 changer transitions 2/91 dead transitions. [2023-08-31 00:38:17,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 873 flow [2023-08-31 00:38:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 00:38:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 00:38:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1078 transitions. [2023-08-31 00:38:17,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-08-31 00:38:17,151 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1078 transitions. [2023-08-31 00:38:17,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1078 transitions. [2023-08-31 00:38:17,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:17,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1078 transitions. [2023-08-31 00:38:17,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:17,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:17,156 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:17,156 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 431 flow. Second operand 7 states and 1078 transitions. [2023-08-31 00:38:17,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 873 flow [2023-08-31 00:38:17,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 847 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-31 00:38:17,162 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 563 flow [2023-08-31 00:38:17,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-31 00:38:17,162 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-08-31 00:38:17,163 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 563 flow [2023-08-31 00:38:17,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.28571428571428) internal successors, (1052), 7 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:17,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:17,163 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:17,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:17,370 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,SelfDestructingSolverStorable16 [2023-08-31 00:38:17,370 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:17,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:17,371 INFO L85 PathProgramCache]: Analyzing trace with hash -604771874, now seen corresponding path program 3 times [2023-08-31 00:38:17,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:17,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066115250] [2023-08-31 00:38:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:17,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:17,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066115250] [2023-08-31 00:38:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066115250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256928963] [2023-08-31 00:38:17,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:38:17,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:17,466 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) [2023-08-31 00:38:17,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 00:38:17,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 00:38:17,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:17,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 00:38:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:17,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256928963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:17,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:17,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-31 00:38:17,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263911891] [2023-08-31 00:38:17,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:17,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 00:38:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 00:38:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-31 00:38:18,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:38:18,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 563 flow. Second operand has 15 states, 15 states have (on average 133.13333333333333) internal successors, (1997), 15 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:18,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:18,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:38:18,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:18,635 INFO L130 PetriNetUnfolder]: 987/1932 cut-off events. [2023-08-31 00:38:18,636 INFO L131 PetriNetUnfolder]: For 8382/8382 co-relation queries the response was YES. [2023-08-31 00:38:18,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 1932 events. 987/1932 cut-off events. For 8382/8382 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11836 event pairs, 288 based on Foata normal form. 168/2100 useless extension candidates. Maximal degree in co-relation 9269. Up to 549 conditions per place. [2023-08-31 00:38:18,652 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 164 selfloop transitions, 51 changer transitions 3/218 dead transitions. [2023-08-31 00:38:18,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 218 transitions, 2360 flow [2023-08-31 00:38:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 00:38:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 00:38:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2054 transitions. [2023-08-31 00:38:18,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42263374485596705 [2023-08-31 00:38:18,655 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2054 transitions. [2023-08-31 00:38:18,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2054 transitions. [2023-08-31 00:38:18,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:18,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2054 transitions. [2023-08-31 00:38:18,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.93333333333334) internal successors, (2054), 15 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:18,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:18,665 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:18,665 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 563 flow. Second operand 15 states and 2054 transitions. [2023-08-31 00:38:18,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 218 transitions, 2360 flow [2023-08-31 00:38:18,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 218 transitions, 2259 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-08-31 00:38:18,683 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 1088 flow [2023-08-31 00:38:18,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1088, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2023-08-31 00:38:18,683 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-08-31 00:38:18,684 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 1088 flow [2023-08-31 00:38:18,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 133.13333333333333) internal successors, (1997), 15 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:18,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:18,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:18,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 00:38:18,890 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,SelfDestructingSolverStorable17 [2023-08-31 00:38:18,890 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:18,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash -128575453, now seen corresponding path program 4 times [2023-08-31 00:38:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:18,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650964449] [2023-08-31 00:38:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:18,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650964449] [2023-08-31 00:38:18,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650964449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:18,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034904521] [2023-08-31 00:38:18,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:38:18,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:18,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:18,982 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) [2023-08-31 00:38:18,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 00:38:19,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:38:19,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:19,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 00:38:19,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:19,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:38:19,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034904521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:19,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:19,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-31 00:38:19,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080122656] [2023-08-31 00:38:19,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:19,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 00:38:19,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:19,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 00:38:19,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-31 00:38:19,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-08-31 00:38:19,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 1088 flow. Second operand has 13 states, 13 states have (on average 135.07692307692307) internal successors, (1756), 13 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:19,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:19,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-08-31 00:38:19,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:19,816 INFO L130 PetriNetUnfolder]: 705/1378 cut-off events. [2023-08-31 00:38:19,817 INFO L131 PetriNetUnfolder]: For 6998/6998 co-relation queries the response was YES. [2023-08-31 00:38:19,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7255 conditions, 1378 events. 705/1378 cut-off events. For 6998/6998 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7663 event pairs, 396 based on Foata normal form. 30/1408 useless extension candidates. Maximal degree in co-relation 6890. Up to 1103 conditions per place. [2023-08-31 00:38:19,829 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 71 selfloop transitions, 3 changer transitions 42/116 dead transitions. [2023-08-31 00:38:19,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 116 transitions, 1432 flow [2023-08-31 00:38:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:38:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:38:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 834 transitions. [2023-08-31 00:38:19,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42901234567901236 [2023-08-31 00:38:19,832 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 834 transitions. [2023-08-31 00:38:19,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 834 transitions. [2023-08-31 00:38:19,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:19,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 834 transitions. [2023-08-31 00:38:19,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:19,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:19,837 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:19,838 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 1088 flow. Second operand 6 states and 834 transitions. [2023-08-31 00:38:19,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 116 transitions, 1432 flow [2023-08-31 00:38:19,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 1393 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-31 00:38:19,885 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 746 flow [2023-08-31 00:38:19,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=746, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-08-31 00:38:19,886 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-08-31 00:38:19,886 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 746 flow [2023-08-31 00:38:19,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 135.07692307692307) internal successors, (1756), 13 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:19,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:19,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:19,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:20,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:20,093 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:20,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2055837313, now seen corresponding path program 5 times [2023-08-31 00:38:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:20,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796221331] [2023-08-31 00:38:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 00:38:20,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:20,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796221331] [2023-08-31 00:38:20,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796221331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:20,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772360269] [2023-08-31 00:38:20,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:38:20,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:20,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:20,271 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) [2023-08-31 00:38:20,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 00:38:20,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:38:20,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 00:38:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:20,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:20,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772360269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:20,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:20,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2023-08-31 00:38:20,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127184737] [2023-08-31 00:38:20,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:20,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 00:38:20,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 00:38:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-31 00:38:21,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-08-31 00:38:21,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 746 flow. Second operand has 17 states, 17 states have (on average 127.82352941176471) internal successors, (2173), 17 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:21,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:21,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-08-31 00:38:21,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:22,240 INFO L130 PetriNetUnfolder]: 675/1291 cut-off events. [2023-08-31 00:38:22,240 INFO L131 PetriNetUnfolder]: For 6858/6858 co-relation queries the response was YES. [2023-08-31 00:38:22,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6764 conditions, 1291 events. 675/1291 cut-off events. For 6858/6858 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6996 event pairs, 40 based on Foata normal form. 43/1334 useless extension candidates. Maximal degree in co-relation 6716. Up to 351 conditions per place. [2023-08-31 00:38:22,249 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 128 selfloop transitions, 60 changer transitions 22/210 dead transitions. [2023-08-31 00:38:22,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 210 transitions, 2209 flow [2023-08-31 00:38:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 00:38:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 00:38:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2895 transitions. [2023-08-31 00:38:22,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40614478114478114 [2023-08-31 00:38:22,254 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2895 transitions. [2023-08-31 00:38:22,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2895 transitions. [2023-08-31 00:38:22,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:22,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2895 transitions. [2023-08-31 00:38:22,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.5909090909091) internal successors, (2895), 22 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:22,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:22,268 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:22,268 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 746 flow. Second operand 22 states and 2895 transitions. [2023-08-31 00:38:22,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 210 transitions, 2209 flow [2023-08-31 00:38:22,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 210 transitions, 2107 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-08-31 00:38:22,285 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 1201 flow [2023-08-31 00:38:22,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1201, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2023-08-31 00:38:22,285 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-08-31 00:38:22,286 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 1201 flow [2023-08-31 00:38:22,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 127.82352941176471) internal successors, (2173), 17 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:22,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:22,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:22,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:22,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:22,493 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:22,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:22,494 INFO L85 PathProgramCache]: Analyzing trace with hash -7138628, now seen corresponding path program 6 times [2023-08-31 00:38:22,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:22,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044162915] [2023-08-31 00:38:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:22,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:38:22,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:22,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044162915] [2023-08-31 00:38:22,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044162915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:22,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122064279] [2023-08-31 00:38:22,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 00:38:22,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:22,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:22,593 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) [2023-08-31 00:38:22,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 00:38:22,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 00:38:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 00:38:22,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:38:22,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:38:22,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122064279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:22,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:22,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-31 00:38:22,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497547038] [2023-08-31 00:38:22,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:22,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 00:38:22,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 00:38:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-31 00:38:23,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-08-31 00:38:23,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 1201 flow. Second operand has 15 states, 15 states have (on average 134.73333333333332) internal successors, (2021), 15 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:23,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:23,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-08-31 00:38:23,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:23,320 INFO L130 PetriNetUnfolder]: 503/945 cut-off events. [2023-08-31 00:38:23,320 INFO L131 PetriNetUnfolder]: For 6496/6496 co-relation queries the response was YES. [2023-08-31 00:38:23,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 945 events. 503/945 cut-off events. For 6496/6496 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4502 event pairs, 142 based on Foata normal form. 15/960 useless extension candidates. Maximal degree in co-relation 5470. Up to 777 conditions per place. [2023-08-31 00:38:23,329 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 76 selfloop transitions, 13 changer transitions 27/116 dead transitions. [2023-08-31 00:38:23,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 1473 flow [2023-08-31 00:38:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 00:38:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 00:38:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1099 transitions. [2023-08-31 00:38:23,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42399691358024694 [2023-08-31 00:38:23,331 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1099 transitions. [2023-08-31 00:38:23,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1099 transitions. [2023-08-31 00:38:23,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:23,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1099 transitions. [2023-08-31 00:38:23,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 137.375) internal successors, (1099), 8 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:23,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:23,336 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:23,336 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 1201 flow. Second operand 8 states and 1099 transitions. [2023-08-31 00:38:23,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 1473 flow [2023-08-31 00:38:23,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 116 transitions, 1405 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-31 00:38:23,355 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 861 flow [2023-08-31 00:38:23,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-08-31 00:38:23,356 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-08-31 00:38:23,356 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 861 flow [2023-08-31 00:38:23,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.73333333333332) internal successors, (2021), 15 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:23,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:23,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:23,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:23,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:23,568 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:23,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash 943532550, now seen corresponding path program 7 times [2023-08-31 00:38:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:23,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601766910] [2023-08-31 00:38:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:23,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:24,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:24,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601766910] [2023-08-31 00:38:24,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601766910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:24,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302593200] [2023-08-31 00:38:24,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 00:38:24,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:24,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:24,333 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) [2023-08-31 00:38:24,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 00:38:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 00:38:24,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:24,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:25,033 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:38:25,033 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 20 treesize of output 4 [2023-08-31 00:38:25,070 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:38:25,070 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 42 treesize of output 60 [2023-08-31 00:38:25,085 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:38:25,085 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 20 treesize of output 4 [2023-08-31 00:38:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302593200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:25,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:25,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-31 00:38:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304712963] [2023-08-31 00:38:25,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:25,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 00:38:25,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 00:38:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-08-31 00:38:27,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:38:27,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 861 flow. Second operand has 32 states, 32 states have (on average 115.875) internal successors, (3708), 32 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:27,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:27,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:38:27,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:28,391 INFO L130 PetriNetUnfolder]: 510/938 cut-off events. [2023-08-31 00:38:28,391 INFO L131 PetriNetUnfolder]: For 6783/6783 co-relation queries the response was YES. [2023-08-31 00:38:28,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 938 events. 510/938 cut-off events. For 6783/6783 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4511 event pairs, 113 based on Foata normal form. 12/950 useless extension candidates. Maximal degree in co-relation 5266. Up to 770 conditions per place. [2023-08-31 00:38:28,398 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 90 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2023-08-31 00:38:28,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 1352 flow [2023-08-31 00:38:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 00:38:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 00:38:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1544 transitions. [2023-08-31 00:38:28,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36657169990503324 [2023-08-31 00:38:28,401 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1544 transitions. [2023-08-31 00:38:28,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1544 transitions. [2023-08-31 00:38:28,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:28,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1544 transitions. [2023-08-31 00:38:28,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 118.76923076923077) internal successors, (1544), 13 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:28,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:28,407 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:28,407 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 861 flow. Second operand 13 states and 1544 transitions. [2023-08-31 00:38:28,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 1352 flow [2023-08-31 00:38:28,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 1298 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-31 00:38:28,428 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 1021 flow [2023-08-31 00:38:28,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1021, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2023-08-31 00:38:28,429 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-08-31 00:38:28,429 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 1021 flow [2023-08-31 00:38:28,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 115.875) internal successors, (3708), 32 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:28,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:28,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:28,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:28,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-31 00:38:28,636 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:28,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:28,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2133215393, now seen corresponding path program 1 times [2023-08-31 00:38:28,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:28,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515202643] [2023-08-31 00:38:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:28,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:28,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:28,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515202643] [2023-08-31 00:38:28,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515202643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:28,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485593888] [2023-08-31 00:38:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:28,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:28,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:28,980 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) [2023-08-31 00:38:29,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 00:38:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:38:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:29,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:29,343 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:38:29,343 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 42 treesize of output 60 [2023-08-31 00:38:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485593888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:29,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-08-31 00:38:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042492876] [2023-08-31 00:38:29,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:29,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 00:38:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 00:38:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-08-31 00:38:30,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:38:30,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 1021 flow. Second operand has 19 states, 19 states have (on average 132.6315789473684) internal successors, (2520), 19 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:30,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:30,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:38:30,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:30,529 INFO L130 PetriNetUnfolder]: 517/968 cut-off events. [2023-08-31 00:38:30,529 INFO L131 PetriNetUnfolder]: For 8043/8043 co-relation queries the response was YES. [2023-08-31 00:38:30,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5852 conditions, 968 events. 517/968 cut-off events. For 8043/8043 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4787 event pairs, 119 based on Foata normal form. 8/976 useless extension candidates. Maximal degree in co-relation 5797. Up to 722 conditions per place. [2023-08-31 00:38:30,537 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 101 selfloop transitions, 28 changer transitions 19/148 dead transitions. [2023-08-31 00:38:30,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 148 transitions, 1654 flow [2023-08-31 00:38:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 00:38:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 00:38:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1649 transitions. [2023-08-31 00:38:30,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42412551440329216 [2023-08-31 00:38:30,539 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1649 transitions. [2023-08-31 00:38:30,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1649 transitions. [2023-08-31 00:38:30,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:30,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1649 transitions. [2023-08-31 00:38:30,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 137.41666666666666) internal successors, (1649), 12 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:30,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:30,543 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:30,543 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 1021 flow. Second operand 12 states and 1649 transitions. [2023-08-31 00:38:30,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 148 transitions, 1654 flow [2023-08-31 00:38:30,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 148 transitions, 1577 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-08-31 00:38:30,565 INFO L231 Difference]: Finished difference. Result has 107 places, 98 transitions, 1048 flow [2023-08-31 00:38:30,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1048, PETRI_PLACES=107, PETRI_TRANSITIONS=98} [2023-08-31 00:38:30,565 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2023-08-31 00:38:30,566 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 98 transitions, 1048 flow [2023-08-31 00:38:30,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 132.6315789473684) internal successors, (2520), 19 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:30,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:30,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:30,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:30,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:30,773 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:30,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash -88608933, now seen corresponding path program 2 times [2023-08-31 00:38:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:30,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491887743] [2023-08-31 00:38:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:31,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:31,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491887743] [2023-08-31 00:38:31,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491887743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:31,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796819012] [2023-08-31 00:38:31,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:38:31,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:31,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:31,102 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) [2023-08-31 00:38:31,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 00:38:31,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:38:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:38:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:31,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:31,526 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:38:31,527 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 42 treesize of output 60 [2023-08-31 00:38:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:31,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796819012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:31,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:31,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2023-08-31 00:38:31,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960663234] [2023-08-31 00:38:31,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:31,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 00:38:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 00:38:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-31 00:38:32,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:38:32,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 98 transitions, 1048 flow. Second operand has 20 states, 20 states have (on average 132.4) internal successors, (2648), 20 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:32,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:32,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:38:32,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:32,789 INFO L130 PetriNetUnfolder]: 539/992 cut-off events. [2023-08-31 00:38:32,789 INFO L131 PetriNetUnfolder]: For 8718/8718 co-relation queries the response was YES. [2023-08-31 00:38:32,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6069 conditions, 992 events. 539/992 cut-off events. For 8718/8718 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4865 event pairs, 109 based on Foata normal form. 12/1004 useless extension candidates. Maximal degree in co-relation 6013. Up to 716 conditions per place. [2023-08-31 00:38:32,798 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 102 selfloop transitions, 43 changer transitions 2/147 dead transitions. [2023-08-31 00:38:32,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1768 flow [2023-08-31 00:38:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 00:38:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 00:38:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1779 transitions. [2023-08-31 00:38:32,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42236467236467234 [2023-08-31 00:38:32,801 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1779 transitions. [2023-08-31 00:38:32,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1779 transitions. [2023-08-31 00:38:32,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:32,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1779 transitions. [2023-08-31 00:38:32,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 136.84615384615384) internal successors, (1779), 13 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:32,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:32,807 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:32,808 INFO L175 Difference]: Start difference. First operand has 107 places, 98 transitions, 1048 flow. Second operand 13 states and 1779 transitions. [2023-08-31 00:38:32,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1768 flow [2023-08-31 00:38:32,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 1705 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-31 00:38:32,828 INFO L231 Difference]: Finished difference. Result has 117 places, 110 transitions, 1262 flow [2023-08-31 00:38:32,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1262, PETRI_PLACES=117, PETRI_TRANSITIONS=110} [2023-08-31 00:38:32,828 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2023-08-31 00:38:32,829 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 110 transitions, 1262 flow [2023-08-31 00:38:32,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 132.4) internal successors, (2648), 20 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:32,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:32,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:32,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:33,036 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:33,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1583523661, now seen corresponding path program 3 times [2023-08-31 00:38:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:33,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563674450] [2023-08-31 00:38:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:33,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:33,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563674450] [2023-08-31 00:38:33,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563674450] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:33,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418499223] [2023-08-31 00:38:33,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:38:33,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:33,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:33,417 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) [2023-08-31 00:38:33,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 00:38:33,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 00:38:33,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 00:38:33,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:33,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 00:38:33,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:38:33,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:38:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 00:38:33,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:34,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:38:34,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2023-08-31 00:38:34,144 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:38:34,144 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 1804 treesize of output 1564 [2023-08-31 00:38:34,185 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:38:34,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:38:34,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:38:34,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 748 treesize of output 572 [2023-08-31 00:38:34,228 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:38:34,230 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:38:34,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:38:34,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 524 treesize of output 460 [2023-08-31 00:38:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:38:35,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418499223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:35,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:35,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2023-08-31 00:38:35,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552848159] [2023-08-31 00:38:35,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:35,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 00:38:35,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 00:38:35,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=429, Unknown=8, NotChecked=0, Total=552 [2023-08-31 00:38:36,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-08-31 00:38:36,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 110 transitions, 1262 flow. Second operand has 24 states, 24 states have (on average 93.95833333333333) internal successors, (2255), 24 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:36,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:36,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-08-31 00:38:36,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:36,936 INFO L130 PetriNetUnfolder]: 585/1101 cut-off events. [2023-08-31 00:38:36,936 INFO L131 PetriNetUnfolder]: For 11783/11783 co-relation queries the response was YES. [2023-08-31 00:38:36,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7084 conditions, 1101 events. 585/1101 cut-off events. For 11783/11783 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5662 event pairs, 127 based on Foata normal form. 12/1113 useless extension candidates. Maximal degree in co-relation 7023. Up to 832 conditions per place. [2023-08-31 00:38:36,946 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 112 selfloop transitions, 43 changer transitions 23/178 dead transitions. [2023-08-31 00:38:36,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 2142 flow [2023-08-31 00:38:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 00:38:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 00:38:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1866 transitions. [2023-08-31 00:38:36,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3031189083820663 [2023-08-31 00:38:36,950 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1866 transitions. [2023-08-31 00:38:36,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1866 transitions. [2023-08-31 00:38:36,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:36,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1866 transitions. [2023-08-31 00:38:36,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 98.21052631578948) internal successors, (1866), 19 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:36,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:36,958 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:36,958 INFO L175 Difference]: Start difference. First operand has 117 places, 110 transitions, 1262 flow. Second operand 19 states and 1866 transitions. [2023-08-31 00:38:36,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 2142 flow [2023-08-31 00:38:36,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 178 transitions, 2048 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-08-31 00:38:36,991 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1412 flow [2023-08-31 00:38:36,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1412, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-08-31 00:38:36,991 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-08-31 00:38:36,992 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1412 flow [2023-08-31 00:38:36,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 93.95833333333333) internal successors, (2255), 24 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:36,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:36,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:36,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:37,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:37,198 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:37,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1313030174, now seen corresponding path program 8 times [2023-08-31 00:38:37,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:37,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413072151] [2023-08-31 00:38:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:37,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:37,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:37,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413072151] [2023-08-31 00:38:37,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413072151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:37,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725281317] [2023-08-31 00:38:37,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:38:37,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:37,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:37,860 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) [2023-08-31 00:38:37,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 00:38:37,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:38:37,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:37,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 00:38:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:38,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:38,537 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:38:38,537 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 20 treesize of output 4 [2023-08-31 00:38:38,573 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:38:38,573 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 42 treesize of output 60 [2023-08-31 00:38:38,591 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:38:38,591 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 20 treesize of output 4 [2023-08-31 00:38:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:38,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725281317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:38,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:38,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-31 00:38:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719054055] [2023-08-31 00:38:38,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:38,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 00:38:38,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 00:38:38,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 00:38:41,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:38:41,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1412 flow. Second operand has 33 states, 33 states have (on average 115.6969696969697) internal successors, (3818), 33 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:41,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:41,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:38:41,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:41,762 INFO L130 PetriNetUnfolder]: 565/1054 cut-off events. [2023-08-31 00:38:41,762 INFO L131 PetriNetUnfolder]: For 11383/11383 co-relation queries the response was YES. [2023-08-31 00:38:41,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6927 conditions, 1054 events. 565/1054 cut-off events. For 11383/11383 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5266 event pairs, 147 based on Foata normal form. 2/1056 useless extension candidates. Maximal degree in co-relation 6857. Up to 973 conditions per place. [2023-08-31 00:38:41,770 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 100 selfloop transitions, 27 changer transitions 2/129 dead transitions. [2023-08-31 00:38:41,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 129 transitions, 1750 flow [2023-08-31 00:38:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:38:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:38:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1651 transitions. [2023-08-31 00:38:41,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36397707231040566 [2023-08-31 00:38:41,776 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1651 transitions. [2023-08-31 00:38:41,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1651 transitions. [2023-08-31 00:38:41,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:41,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1651 transitions. [2023-08-31 00:38:41,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 117.92857142857143) internal successors, (1651), 14 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:41,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:41,782 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:41,782 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1412 flow. Second operand 14 states and 1651 transitions. [2023-08-31 00:38:41,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 129 transitions, 1750 flow [2023-08-31 00:38:41,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 1679 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-31 00:38:41,812 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1401 flow [2023-08-31 00:38:41,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1401, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-08-31 00:38:41,814 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-08-31 00:38:41,814 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1401 flow [2023-08-31 00:38:41,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 115.6969696969697) internal successors, (3818), 33 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:41,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:41,815 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:41,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:42,021 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,SelfDestructingSolverStorable25 [2023-08-31 00:38:42,021 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:42,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash 456534228, now seen corresponding path program 9 times [2023-08-31 00:38:42,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:42,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370033941] [2023-08-31 00:38:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:42,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:42,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:42,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370033941] [2023-08-31 00:38:42,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370033941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:42,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833994517] [2023-08-31 00:38:42,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:38:42,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:42,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:42,542 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) [2023-08-31 00:38:42,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 00:38:42,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 00:38:42,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 00:38:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:43,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:43,279 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:38:43,279 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 42 treesize of output 60 [2023-08-31 00:38:43,301 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:38:43,302 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 20 treesize of output 4 [2023-08-31 00:38:43,310 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:38:43,310 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 20 treesize of output 4 [2023-08-31 00:38:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:43,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833994517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:43,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:43,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2023-08-31 00:38:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127851244] [2023-08-31 00:38:43,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:43,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 00:38:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 00:38:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-08-31 00:38:45,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:38:45,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1401 flow. Second operand has 28 states, 28 states have (on average 115.60714285714286) internal successors, (3237), 28 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:45,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:45,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:38:45,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:46,379 INFO L130 PetriNetUnfolder]: 588/1099 cut-off events. [2023-08-31 00:38:46,380 INFO L131 PetriNetUnfolder]: For 13894/13894 co-relation queries the response was YES. [2023-08-31 00:38:46,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 1099 events. 588/1099 cut-off events. For 13894/13894 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5570 event pairs, 139 based on Foata normal form. 24/1123 useless extension candidates. Maximal degree in co-relation 7310. Up to 955 conditions per place. [2023-08-31 00:38:46,389 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 116 selfloop transitions, 37 changer transitions 5/158 dead transitions. [2023-08-31 00:38:46,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 2061 flow [2023-08-31 00:38:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 00:38:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 00:38:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2019 transitions. [2023-08-31 00:38:46,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36655773420479304 [2023-08-31 00:38:46,400 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2019 transitions. [2023-08-31 00:38:46,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2019 transitions. [2023-08-31 00:38:46,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:46,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2019 transitions. [2023-08-31 00:38:46,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.76470588235294) internal successors, (2019), 17 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:46,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:46,407 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:46,408 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1401 flow. Second operand 17 states and 2019 transitions. [2023-08-31 00:38:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 2061 flow [2023-08-31 00:38:46,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 158 transitions, 1997 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-31 00:38:46,443 INFO L231 Difference]: Finished difference. Result has 139 places, 121 transitions, 1509 flow [2023-08-31 00:38:46,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1509, PETRI_PLACES=139, PETRI_TRANSITIONS=121} [2023-08-31 00:38:46,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2023-08-31 00:38:46,444 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 121 transitions, 1509 flow [2023-08-31 00:38:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 115.60714285714286) internal successors, (3237), 28 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:46,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:46,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:46,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:46,650 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,SelfDestructingSolverStorable26 [2023-08-31 00:38:46,651 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:46,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1392949847, now seen corresponding path program 4 times [2023-08-31 00:38:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:46,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091084807] [2023-08-31 00:38:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:46,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:46,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:46,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091084807] [2023-08-31 00:38:46,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091084807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:46,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470127458] [2023-08-31 00:38:46,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:38:46,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:46,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:46,991 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) [2023-08-31 00:38:47,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 00:38:47,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:38:47,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:47,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 00:38:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:47,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:47,337 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:38:47,337 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 40 treesize of output 56 [2023-08-31 00:38:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:47,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470127458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:47,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:47,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 17 [2023-08-31 00:38:47,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278657443] [2023-08-31 00:38:47,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:47,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 00:38:47,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:47,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 00:38:47,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-31 00:38:47,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:38:47,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 121 transitions, 1509 flow. Second operand has 18 states, 18 states have (on average 132.77777777777777) internal successors, (2390), 18 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:47,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:47,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:38:47,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:48,488 INFO L130 PetriNetUnfolder]: 632/1178 cut-off events. [2023-08-31 00:38:48,488 INFO L131 PetriNetUnfolder]: For 17245/17245 co-relation queries the response was YES. [2023-08-31 00:38:48,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8310 conditions, 1178 events. 632/1178 cut-off events. For 17245/17245 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6085 event pairs, 94 based on Foata normal form. 8/1186 useless extension candidates. Maximal degree in co-relation 8239. Up to 704 conditions per place. [2023-08-31 00:38:48,498 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 125 selfloop transitions, 52 changer transitions 3/180 dead transitions. [2023-08-31 00:38:48,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 180 transitions, 2468 flow [2023-08-31 00:38:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:38:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:38:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1923 transitions. [2023-08-31 00:38:48,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42394179894179895 [2023-08-31 00:38:48,519 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1923 transitions. [2023-08-31 00:38:48,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1923 transitions. [2023-08-31 00:38:48,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:48,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1923 transitions. [2023-08-31 00:38:48,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.35714285714286) internal successors, (1923), 14 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:48,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:48,550 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:48,550 INFO L175 Difference]: Start difference. First operand has 139 places, 121 transitions, 1509 flow. Second operand 14 states and 1923 transitions. [2023-08-31 00:38:48,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 180 transitions, 2468 flow [2023-08-31 00:38:48,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 180 transitions, 2372 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-08-31 00:38:48,593 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 1612 flow [2023-08-31 00:38:48,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1612, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2023-08-31 00:38:48,598 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-08-31 00:38:48,598 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 1612 flow [2023-08-31 00:38:48,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 132.77777777777777) internal successors, (2390), 18 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:48,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:48,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:48,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:48,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 00:38:48,805 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:48,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1043539718, now seen corresponding path program 10 times [2023-08-31 00:38:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:48,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412062186] [2023-08-31 00:38:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:49,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:49,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412062186] [2023-08-31 00:38:49,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412062186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:49,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261909462] [2023-08-31 00:38:49,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:38:49,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:49,338 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) [2023-08-31 00:38:49,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 00:38:49,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:38:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:49,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 00:38:49,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:49,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:49,735 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-08-31 00:38:49,736 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 47 treesize of output 67 [2023-08-31 00:38:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:49,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261909462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:49,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:49,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-31 00:38:49,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772979220] [2023-08-31 00:38:49,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:49,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 00:38:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 00:38:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-08-31 00:38:51,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-31 00:38:51,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 1612 flow. Second operand has 24 states, 24 states have (on average 114.16666666666667) internal successors, (2740), 24 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:51,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:51,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-31 00:38:51,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:51,982 INFO L130 PetriNetUnfolder]: 641/1206 cut-off events. [2023-08-31 00:38:51,982 INFO L131 PetriNetUnfolder]: For 18735/18735 co-relation queries the response was YES. [2023-08-31 00:38:51,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8653 conditions, 1206 events. 641/1206 cut-off events. For 18735/18735 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6332 event pairs, 114 based on Foata normal form. 4/1210 useless extension candidates. Maximal degree in co-relation 8579. Up to 769 conditions per place. [2023-08-31 00:38:51,990 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 121 selfloop transitions, 52 changer transitions 16/189 dead transitions. [2023-08-31 00:38:51,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 189 transitions, 2534 flow [2023-08-31 00:38:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 00:38:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 00:38:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2118 transitions. [2023-08-31 00:38:51,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631687242798354 [2023-08-31 00:38:52,000 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2118 transitions. [2023-08-31 00:38:52,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2118 transitions. [2023-08-31 00:38:52,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:52,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2118 transitions. [2023-08-31 00:38:52,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 117.66666666666667) internal successors, (2118), 18 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:52,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:52,007 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:52,008 INFO L175 Difference]: Start difference. First operand has 143 places, 126 transitions, 1612 flow. Second operand 18 states and 2118 transitions. [2023-08-31 00:38:52,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 189 transitions, 2534 flow [2023-08-31 00:38:52,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 189 transitions, 2447 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-31 00:38:52,058 INFO L231 Difference]: Finished difference. Result has 158 places, 134 transitions, 1805 flow [2023-08-31 00:38:52,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1805, PETRI_PLACES=158, PETRI_TRANSITIONS=134} [2023-08-31 00:38:52,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-08-31 00:38:52,061 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 134 transitions, 1805 flow [2023-08-31 00:38:52,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 114.16666666666667) internal successors, (2740), 24 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:52,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:52,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:52,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:52,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:52,268 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:52,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2045874430, now seen corresponding path program 11 times [2023-08-31 00:38:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:52,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471567318] [2023-08-31 00:38:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:52,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471567318] [2023-08-31 00:38:52,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471567318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666264469] [2023-08-31 00:38:52,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:38:52,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:52,822 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) [2023-08-31 00:38:52,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 00:38:52,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 00:38:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:38:52,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:53,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:53,390 INFO L321 Elim1Store]: treesize reduction 35, result has 80.9 percent of original size [2023-08-31 00:38:53,391 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 89 treesize of output 173 [2023-08-31 00:38:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:38:53,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666264469] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:38:53,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:38:53,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-31 00:38:53,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332105415] [2023-08-31 00:38:53,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:38:53,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 00:38:53,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:38:53,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 00:38:53,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-08-31 00:38:55,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:38:55,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 134 transitions, 1805 flow. Second operand has 24 states, 24 states have (on average 116.16666666666667) internal successors, (2788), 24 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:55,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:38:55,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:38:55,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:38:55,939 INFO L130 PetriNetUnfolder]: 637/1193 cut-off events. [2023-08-31 00:38:55,939 INFO L131 PetriNetUnfolder]: For 21843/21843 co-relation queries the response was YES. [2023-08-31 00:38:55,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9097 conditions, 1193 events. 637/1193 cut-off events. For 21843/21843 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6229 event pairs, 152 based on Foata normal form. 4/1197 useless extension candidates. Maximal degree in co-relation 9015. Up to 914 conditions per place. [2023-08-31 00:38:55,948 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 109 selfloop transitions, 50 changer transitions 7/166 dead transitions. [2023-08-31 00:38:55,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 2387 flow [2023-08-31 00:38:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 00:38:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 00:38:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2024 transitions. [2023-08-31 00:38:55,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674655047204067 [2023-08-31 00:38:55,950 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2024 transitions. [2023-08-31 00:38:55,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2024 transitions. [2023-08-31 00:38:55,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:38:55,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2024 transitions. [2023-08-31 00:38:55,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 119.05882352941177) internal successors, (2024), 17 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:55,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:55,956 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:55,956 INFO L175 Difference]: Start difference. First operand has 158 places, 134 transitions, 1805 flow. Second operand 17 states and 2024 transitions. [2023-08-31 00:38:55,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 2387 flow [2023-08-31 00:38:56,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 2253 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-08-31 00:38:56,012 INFO L231 Difference]: Finished difference. Result has 166 places, 136 transitions, 1843 flow [2023-08-31 00:38:56,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1843, PETRI_PLACES=166, PETRI_TRANSITIONS=136} [2023-08-31 00:38:56,012 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-08-31 00:38:56,012 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 136 transitions, 1843 flow [2023-08-31 00:38:56,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 116.16666666666667) internal successors, (2788), 24 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:38:56,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:38:56,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:38:56,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 00:38:56,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:56,214 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:38:56,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:38:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash -962381630, now seen corresponding path program 12 times [2023-08-31 00:38:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:38:56,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266918953] [2023-08-31 00:38:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:38:56,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:38:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:38:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:38:56,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:38:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266918953] [2023-08-31 00:38:56,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266918953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:38:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536919976] [2023-08-31 00:38:56,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 00:38:56,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:38:56,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:38:56,774 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) [2023-08-31 00:38:56,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 00:38:57,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 00:38:57,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:38:57,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 00:38:57,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:38:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:38:57,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:38:57,495 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-08-31 00:38:57,495 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 89 treesize of output 220 [2023-08-31 00:39:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:39:02,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536919976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:39:02,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:39:02,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-31 00:39:02,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768082107] [2023-08-31 00:39:02,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:39:02,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 00:39:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:39:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 00:39:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-08-31 00:39:03,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:39:03,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 136 transitions, 1843 flow. Second operand has 24 states, 24 states have (on average 116.25) internal successors, (2790), 24 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:03,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:39:03,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:39:03,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:39:04,290 INFO L130 PetriNetUnfolder]: 681/1281 cut-off events. [2023-08-31 00:39:04,290 INFO L131 PetriNetUnfolder]: For 26071/26071 co-relation queries the response was YES. [2023-08-31 00:39:04,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9743 conditions, 1281 events. 681/1281 cut-off events. For 26071/26071 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6833 event pairs, 133 based on Foata normal form. 48/1329 useless extension candidates. Maximal degree in co-relation 9658. Up to 906 conditions per place. [2023-08-31 00:39:04,300 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 129 selfloop transitions, 66 changer transitions 12/207 dead transitions. [2023-08-31 00:39:04,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 207 transitions, 2873 flow [2023-08-31 00:39:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 00:39:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 00:39:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2640 transitions. [2023-08-31 00:39:04,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-08-31 00:39:04,304 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2640 transitions. [2023-08-31 00:39:04,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2640 transitions. [2023-08-31 00:39:04,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:39:04,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2640 transitions. [2023-08-31 00:39:04,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 120.0) internal successors, (2640), 22 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:04,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:04,313 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:04,314 INFO L175 Difference]: Start difference. First operand has 166 places, 136 transitions, 1843 flow. Second operand 22 states and 2640 transitions. [2023-08-31 00:39:04,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 207 transitions, 2873 flow [2023-08-31 00:39:04,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 207 transitions, 2769 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-08-31 00:39:04,375 INFO L231 Difference]: Finished difference. Result has 176 places, 144 transitions, 2063 flow [2023-08-31 00:39:04,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2063, PETRI_PLACES=176, PETRI_TRANSITIONS=144} [2023-08-31 00:39:04,376 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-08-31 00:39:04,376 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 144 transitions, 2063 flow [2023-08-31 00:39:04,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 116.25) internal successors, (2790), 24 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:04,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:39:04,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:39:04,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 00:39:04,581 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,SelfDestructingSolverStorable30 [2023-08-31 00:39:04,581 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:39:04,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:39:04,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1900475021, now seen corresponding path program 5 times [2023-08-31 00:39:04,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:39:04,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209056388] [2023-08-31 00:39:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:39:04,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:39:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:39:04,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:39:04,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209056388] [2023-08-31 00:39:04,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209056388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:39:04,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30683543] [2023-08-31 00:39:04,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:39:04,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:39:04,899 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) [2023-08-31 00:39:04,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 00:39:05,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 00:39:05,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:39:05,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 00:39:05,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:39:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:39:05,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:39:05,242 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:39:05,242 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 42 treesize of output 60 [2023-08-31 00:39:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:39:05,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30683543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:39:05,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:39:05,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 15 [2023-08-31 00:39:05,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742616547] [2023-08-31 00:39:05,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:39:05,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 00:39:05,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:39:05,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 00:39:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-08-31 00:39:05,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:39:05,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 144 transitions, 2063 flow. Second operand has 16 states, 16 states have (on average 132.4375) internal successors, (2119), 16 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:05,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:39:05,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:39:05,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:39:06,480 INFO L130 PetriNetUnfolder]: 775/1447 cut-off events. [2023-08-31 00:39:06,480 INFO L131 PetriNetUnfolder]: For 36374/36374 co-relation queries the response was YES. [2023-08-31 00:39:06,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 1447 events. 775/1447 cut-off events. For 36374/36374 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7900 event pairs, 106 based on Foata normal form. 32/1479 useless extension candidates. Maximal degree in co-relation 11722. Up to 922 conditions per place. [2023-08-31 00:39:06,491 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 177 selfloop transitions, 49 changer transitions 1/227 dead transitions. [2023-08-31 00:39:06,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 3627 flow [2023-08-31 00:39:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 00:39:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 00:39:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2318 transitions. [2023-08-31 00:39:06,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42084241103848946 [2023-08-31 00:39:06,495 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2318 transitions. [2023-08-31 00:39:06,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2318 transitions. [2023-08-31 00:39:06,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:39:06,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2318 transitions. [2023-08-31 00:39:06,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 136.35294117647058) internal successors, (2318), 17 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:06,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:06,502 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:06,502 INFO L175 Difference]: Start difference. First operand has 176 places, 144 transitions, 2063 flow. Second operand 17 states and 2318 transitions. [2023-08-31 00:39:06,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 3627 flow [2023-08-31 00:39:06,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 227 transitions, 3485 flow, removed 30 selfloop flow, removed 15 redundant places. [2023-08-31 00:39:06,602 INFO L231 Difference]: Finished difference. Result has 183 places, 163 transitions, 2288 flow [2023-08-31 00:39:06,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2288, PETRI_PLACES=183, PETRI_TRANSITIONS=163} [2023-08-31 00:39:06,603 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-08-31 00:39:06,603 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 163 transitions, 2288 flow [2023-08-31 00:39:06,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 132.4375) internal successors, (2119), 16 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:06,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:39:06,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:39:06,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 00:39:06,804 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,SelfDestructingSolverStorable31 [2023-08-31 00:39:06,804 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:39:06,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:39:06,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1115989726, now seen corresponding path program 13 times [2023-08-31 00:39:06,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:39:06,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400478829] [2023-08-31 00:39:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:39:06,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:39:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:39:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400478829] [2023-08-31 00:39:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400478829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:39:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791404359] [2023-08-31 00:39:07,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 00:39:07,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:07,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:39:07,361 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) [2023-08-31 00:39:07,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 00:39:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 00:39:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:39:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:07,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:39:07,930 INFO L321 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-08-31 00:39:07,931 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 49 treesize of output 86 [2023-08-31 00:39:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:08,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791404359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:39:08,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:39:08,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-31 00:39:08,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720581245] [2023-08-31 00:39:08,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:39:08,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 00:39:08,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:39:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 00:39:08,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2023-08-31 00:39:10,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-08-31 00:39:10,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 163 transitions, 2288 flow. Second operand has 32 states, 32 states have (on average 114.75) internal successors, (3672), 32 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:10,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:39:10,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-08-31 00:39:10,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:39:10,948 INFO L130 PetriNetUnfolder]: 776/1457 cut-off events. [2023-08-31 00:39:10,948 INFO L131 PetriNetUnfolder]: For 36803/36803 co-relation queries the response was YES. [2023-08-31 00:39:10,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12087 conditions, 1457 events. 776/1457 cut-off events. For 36803/36803 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8031 event pairs, 190 based on Foata normal form. 2/1459 useless extension candidates. Maximal degree in co-relation 11993. Up to 1391 conditions per place. [2023-08-31 00:39:10,960 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 147 selfloop transitions, 19 changer transitions 13/179 dead transitions. [2023-08-31 00:39:10,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 179 transitions, 2814 flow [2023-08-31 00:39:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 00:39:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 00:39:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1514 transitions. [2023-08-31 00:39:10,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944919278252613 [2023-08-31 00:39:10,967 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1514 transitions. [2023-08-31 00:39:10,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1514 transitions. [2023-08-31 00:39:10,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:39:10,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1514 transitions. [2023-08-31 00:39:10,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 116.46153846153847) internal successors, (1514), 13 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:10,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:10,972 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:10,972 INFO L175 Difference]: Start difference. First operand has 183 places, 163 transitions, 2288 flow. Second operand 13 states and 1514 transitions. [2023-08-31 00:39:10,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 179 transitions, 2814 flow [2023-08-31 00:39:11,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 179 transitions, 2655 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-08-31 00:39:11,079 INFO L231 Difference]: Finished difference. Result has 188 places, 163 transitions, 2201 flow [2023-08-31 00:39:11,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2201, PETRI_PLACES=188, PETRI_TRANSITIONS=163} [2023-08-31 00:39:11,079 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2023-08-31 00:39:11,079 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 163 transitions, 2201 flow [2023-08-31 00:39:11,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 114.75) internal successors, (3672), 32 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:11,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:39:11,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:39:11,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 00:39:11,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:11,281 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:39:11,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:39:11,281 INFO L85 PathProgramCache]: Analyzing trace with hash 966105765, now seen corresponding path program 6 times [2023-08-31 00:39:11,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:39:11,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518124609] [2023-08-31 00:39:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:39:11,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:39:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:39:11,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:39:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518124609] [2023-08-31 00:39:11,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518124609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:39:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865527715] [2023-08-31 00:39:11,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 00:39:11,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:11,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:39:11,611 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) [2023-08-31 00:39:11,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 00:39:11,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 00:39:11,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:39:11,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 00:39:11,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:39:11,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:39:11,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:39:11,815 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 00:39:11,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-31 00:39:11,897 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 13 treesize of output 9 [2023-08-31 00:39:11,950 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:39:11,950 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 11 treesize of output 11 [2023-08-31 00:39:11,981 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:39:12,007 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:39:12,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:39:12,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:39:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:39:12,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:39:12,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:12,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 90 [2023-08-31 00:39:12,894 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:39:12,895 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 110572 treesize of output 101920 [2023-08-31 00:39:13,440 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:39:13,443 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:39:13,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:13,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 3164 treesize of output 3006 [2023-08-31 00:39:13,516 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:39:13,518 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:39:13,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:13,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2956 treesize of output 2590 [2023-08-31 00:39:13,586 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:39:13,588 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:39:13,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:13,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2540 treesize of output 1758 [2023-08-31 00:39:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:39:19,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865527715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:39:19,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:39:19,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-08-31 00:39:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797677413] [2023-08-31 00:39:19,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:39:19,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 00:39:19,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:39:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 00:39:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=758, Unknown=19, NotChecked=0, Total=930 [2023-08-31 00:39:21,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 324 [2023-08-31 00:39:21,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 163 transitions, 2201 flow. Second operand has 31 states, 31 states have (on average 82.74193548387096) internal successors, (2565), 31 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:21,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:39:21,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 324 [2023-08-31 00:39:21,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:39:26,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:39:28,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:39:31,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:39:32,550 INFO L130 PetriNetUnfolder]: 1070/2071 cut-off events. [2023-08-31 00:39:32,550 INFO L131 PetriNetUnfolder]: For 65632/65632 co-relation queries the response was YES. [2023-08-31 00:39:32,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17472 conditions, 2071 events. 1070/2071 cut-off events. For 65632/65632 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12342 event pairs, 182 based on Foata normal form. 98/2169 useless extension candidates. Maximal degree in co-relation 16895. Up to 1347 conditions per place. [2023-08-31 00:39:32,568 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 269 selfloop transitions, 74 changer transitions 13/356 dead transitions. [2023-08-31 00:39:32,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 356 transitions, 5274 flow [2023-08-31 00:39:32,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 00:39:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 00:39:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3137 transitions. [2023-08-31 00:39:32,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2689471879286694 [2023-08-31 00:39:32,572 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3137 transitions. [2023-08-31 00:39:32,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3137 transitions. [2023-08-31 00:39:32,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:39:32,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3137 transitions. [2023-08-31 00:39:32,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 87.13888888888889) internal successors, (3137), 36 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:32,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 324.0) internal successors, (11988), 37 states have internal predecessors, (11988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:32,584 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 324.0) internal successors, (11988), 37 states have internal predecessors, (11988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:32,584 INFO L175 Difference]: Start difference. First operand has 188 places, 163 transitions, 2201 flow. Second operand 36 states and 3137 transitions. [2023-08-31 00:39:32,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 356 transitions, 5274 flow [2023-08-31 00:39:32,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 356 transitions, 5164 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-08-31 00:39:32,719 INFO L231 Difference]: Finished difference. Result has 227 places, 218 transitions, 3273 flow [2023-08-31 00:39:32,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3273, PETRI_PLACES=227, PETRI_TRANSITIONS=218} [2023-08-31 00:39:32,720 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 206 predicate places. [2023-08-31 00:39:32,720 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 218 transitions, 3273 flow [2023-08-31 00:39:32,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 82.74193548387096) internal successors, (2565), 31 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:32,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:39:32,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:39:32,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 00:39:32,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:32,927 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:39:32,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:39:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1637860844, now seen corresponding path program 14 times [2023-08-31 00:39:32,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:39:32,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935740826] [2023-08-31 00:39:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:39:32,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:39:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:33,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:39:33,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935740826] [2023-08-31 00:39:33,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935740826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:39:33,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732082021] [2023-08-31 00:39:33,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:39:33,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:33,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:39:33,404 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) [2023-08-31 00:39:33,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 00:39:33,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:39:33,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:39:33,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 00:39:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:39:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:33,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:39:33,947 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 00:39:33,947 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 47 treesize of output 80 [2023-08-31 00:39:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732082021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:39:34,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:39:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-31 00:39:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580505740] [2023-08-31 00:39:34,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:39:34,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 00:39:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:39:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 00:39:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 00:39:35,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-31 00:39:35,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 218 transitions, 3273 flow. Second operand has 33 states, 33 states have (on average 113.6969696969697) internal successors, (3752), 33 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:35,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:39:35,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-31 00:39:35,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:39:36,502 INFO L130 PetriNetUnfolder]: 1056/2043 cut-off events. [2023-08-31 00:39:36,502 INFO L131 PetriNetUnfolder]: For 68932/68932 co-relation queries the response was YES. [2023-08-31 00:39:36,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18190 conditions, 2043 events. 1056/2043 cut-off events. For 68932/68932 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12145 event pairs, 322 based on Foata normal form. 4/2047 useless extension candidates. Maximal degree in co-relation 17707. Up to 1935 conditions per place. [2023-08-31 00:39:36,523 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 185 selfloop transitions, 41 changer transitions 3/229 dead transitions. [2023-08-31 00:39:36,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 229 transitions, 3844 flow [2023-08-31 00:39:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 00:39:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 00:39:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1499 transitions. [2023-08-31 00:39:36,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35588793922127254 [2023-08-31 00:39:36,525 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1499 transitions. [2023-08-31 00:39:36,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1499 transitions. [2023-08-31 00:39:36,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:39:36,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1499 transitions. [2023-08-31 00:39:36,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.3076923076923) internal successors, (1499), 13 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:36,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:36,529 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:36,529 INFO L175 Difference]: Start difference. First operand has 227 places, 218 transitions, 3273 flow. Second operand 13 states and 1499 transitions. [2023-08-31 00:39:36,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 229 transitions, 3844 flow [2023-08-31 00:39:36,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 229 transitions, 3492 flow, removed 149 selfloop flow, removed 6 redundant places. [2023-08-31 00:39:36,703 INFO L231 Difference]: Finished difference. Result has 233 places, 221 transitions, 3099 flow [2023-08-31 00:39:36,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3099, PETRI_PLACES=233, PETRI_TRANSITIONS=221} [2023-08-31 00:39:36,704 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2023-08-31 00:39:36,704 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 221 transitions, 3099 flow [2023-08-31 00:39:36,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 113.6969696969697) internal successors, (3752), 33 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:36,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:39:36,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:39:36,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 00:39:36,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:36,906 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:39:36,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:39:36,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1833946803, now seen corresponding path program 7 times [2023-08-31 00:39:36,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:39:36,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983024344] [2023-08-31 00:39:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:39:36,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:39:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:39:37,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:39:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983024344] [2023-08-31 00:39:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983024344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:39:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889270125] [2023-08-31 00:39:37,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 00:39:37,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:39:37,226 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) [2023-08-31 00:39:37,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 00:39:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 00:39:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:39:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:39:37,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:39:37,599 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:39:37,600 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 40 treesize of output 56 [2023-08-31 00:39:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:39:37,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889270125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:39:37,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:39:37,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 5] total 20 [2023-08-31 00:39:37,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199623714] [2023-08-31 00:39:37,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:39:37,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 00:39:37,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:39:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 00:39:37,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-31 00:39:38,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-31 00:39:38,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 221 transitions, 3099 flow. Second operand has 21 states, 21 states have (on average 128.47619047619048) internal successors, (2698), 21 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:38,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:39:38,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-31 00:39:38,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:39:39,184 INFO L130 PetriNetUnfolder]: 1112/2151 cut-off events. [2023-08-31 00:39:39,184 INFO L131 PetriNetUnfolder]: For 74020/74020 co-relation queries the response was YES. [2023-08-31 00:39:39,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18443 conditions, 2151 events. 1112/2151 cut-off events. For 74020/74020 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12863 event pairs, 258 based on Foata normal form. 28/2179 useless extension candidates. Maximal degree in co-relation 18329. Up to 1603 conditions per place. [2023-08-31 00:39:39,207 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 194 selfloop transitions, 91 changer transitions 7/292 dead transitions. [2023-08-31 00:39:39,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 292 transitions, 4698 flow [2023-08-31 00:39:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 00:39:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 00:39:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2633 transitions. [2023-08-31 00:39:39,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40632716049382717 [2023-08-31 00:39:39,210 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2633 transitions. [2023-08-31 00:39:39,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2633 transitions. [2023-08-31 00:39:39,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:39:39,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2633 transitions. [2023-08-31 00:39:39,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 131.65) internal successors, (2633), 20 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:39,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:39,217 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:39,217 INFO L175 Difference]: Start difference. First operand has 233 places, 221 transitions, 3099 flow. Second operand 20 states and 2633 transitions. [2023-08-31 00:39:39,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 292 transitions, 4698 flow [2023-08-31 00:39:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 292 transitions, 4538 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-08-31 00:39:39,415 INFO L231 Difference]: Finished difference. Result has 241 places, 242 transitions, 3546 flow [2023-08-31 00:39:39,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3546, PETRI_PLACES=241, PETRI_TRANSITIONS=242} [2023-08-31 00:39:39,416 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 220 predicate places. [2023-08-31 00:39:39,416 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 242 transitions, 3546 flow [2023-08-31 00:39:39,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 128.47619047619048) internal successors, (2698), 21 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:39,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:39:39,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:39:39,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 00:39:39,617 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,SelfDestructingSolverStorable35 [2023-08-31 00:39:39,618 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:39:39,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:39:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1288803642, now seen corresponding path program 15 times [2023-08-31 00:39:39,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:39:39,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079042987] [2023-08-31 00:39:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:39:39,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:39:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:40,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:39:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079042987] [2023-08-31 00:39:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079042987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:39:40,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305413924] [2023-08-31 00:39:40,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:39:40,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:40,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:39:40,153 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) [2023-08-31 00:39:40,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 00:39:40,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 00:39:40,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:39:40,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 00:39:40,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:39:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:40,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:39:40,896 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:39:40,896 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 40 treesize of output 56 [2023-08-31 00:39:40,913 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:39:40,913 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 20 treesize of output 4 [2023-08-31 00:39:40,920 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:39:40,920 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 20 treesize of output 4 [2023-08-31 00:39:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305413924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:39:41,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:39:41,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-08-31 00:39:41,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265333749] [2023-08-31 00:39:41,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:39:41,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 00:39:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:39:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 00:39:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-08-31 00:39:43,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-31 00:39:43,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 242 transitions, 3546 flow. Second operand has 31 states, 31 states have (on average 113.58064516129032) internal successors, (3521), 31 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:43,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:39:43,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-31 00:39:43,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:39:43,890 INFO L130 PetriNetUnfolder]: 1096/2127 cut-off events. [2023-08-31 00:39:43,890 INFO L131 PetriNetUnfolder]: For 70986/70986 co-relation queries the response was YES. [2023-08-31 00:39:43,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18366 conditions, 2127 events. 1096/2127 cut-off events. For 70986/70986 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12715 event pairs, 294 based on Foata normal form. 24/2151 useless extension candidates. Maximal degree in co-relation 18252. Up to 1885 conditions per place. [2023-08-31 00:39:43,911 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 207 selfloop transitions, 59 changer transitions 1/267 dead transitions. [2023-08-31 00:39:43,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 267 transitions, 4341 flow [2023-08-31 00:39:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 00:39:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 00:39:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1746 transitions. [2023-08-31 00:39:43,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2023-08-31 00:39:43,913 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1746 transitions. [2023-08-31 00:39:43,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1746 transitions. [2023-08-31 00:39:43,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:39:43,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1746 transitions. [2023-08-31 00:39:43,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.4) internal successors, (1746), 15 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:43,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:43,918 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:43,918 INFO L175 Difference]: Start difference. First operand has 241 places, 242 transitions, 3546 flow. Second operand 15 states and 1746 transitions. [2023-08-31 00:39:43,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 267 transitions, 4341 flow [2023-08-31 00:39:44,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 267 transitions, 4069 flow, removed 82 selfloop flow, removed 12 redundant places. [2023-08-31 00:39:44,098 INFO L231 Difference]: Finished difference. Result has 244 places, 243 transitions, 3452 flow [2023-08-31 00:39:44,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3452, PETRI_PLACES=244, PETRI_TRANSITIONS=243} [2023-08-31 00:39:44,098 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 223 predicate places. [2023-08-31 00:39:44,098 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 243 transitions, 3452 flow [2023-08-31 00:39:44,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 113.58064516129032) internal successors, (3521), 31 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:44,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:39:44,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:39:44,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 00:39:44,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-31 00:39:44,300 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:39:44,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:39:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash -432307696, now seen corresponding path program 16 times [2023-08-31 00:39:44,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:39:44,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985149039] [2023-08-31 00:39:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:39:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:39:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:44,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:39:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985149039] [2023-08-31 00:39:44,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985149039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:39:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113523738] [2023-08-31 00:39:44,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:39:44,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:39:44,817 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) [2023-08-31 00:39:44,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 00:39:44,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:39:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:39:44,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 00:39:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:39:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:39:45,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:39:45,424 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-08-31 00:39:45,424 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 89 treesize of output 220 [2023-08-31 00:39:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:39:47,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113523738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:39:47,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:39:47,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-31 00:39:47,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217043797] [2023-08-31 00:39:47,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:39:47,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 00:39:47,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:39:47,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 00:39:47,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-08-31 00:39:49,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:39:50,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:39:50,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 243 transitions, 3452 flow. Second operand has 24 states, 24 states have (on average 116.16666666666667) internal successors, (2788), 24 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:50,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:39:50,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:39:50,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:39:51,477 INFO L130 PetriNetUnfolder]: 1082/2093 cut-off events. [2023-08-31 00:39:51,478 INFO L131 PetriNetUnfolder]: For 65320/65320 co-relation queries the response was YES. [2023-08-31 00:39:51,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18023 conditions, 2093 events. 1082/2093 cut-off events. For 65320/65320 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12429 event pairs, 260 based on Foata normal form. 16/2109 useless extension candidates. Maximal degree in co-relation 17912. Up to 1633 conditions per place. [2023-08-31 00:39:51,498 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 172 selfloop transitions, 87 changer transitions 8/267 dead transitions. [2023-08-31 00:39:51,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 267 transitions, 4173 flow [2023-08-31 00:39:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 00:39:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 00:39:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2126 transitions. [2023-08-31 00:39:51,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36454046639231824 [2023-08-31 00:39:51,501 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2126 transitions. [2023-08-31 00:39:51,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2126 transitions. [2023-08-31 00:39:51,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:39:51,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2126 transitions. [2023-08-31 00:39:51,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 118.11111111111111) internal successors, (2126), 18 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:51,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:51,508 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:51,508 INFO L175 Difference]: Start difference. First operand has 244 places, 243 transitions, 3452 flow. Second operand 18 states and 2126 transitions. [2023-08-31 00:39:51,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 267 transitions, 4173 flow [2023-08-31 00:39:51,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 267 transitions, 4039 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-08-31 00:39:51,716 INFO L231 Difference]: Finished difference. Result has 249 places, 240 transitions, 3470 flow [2023-08-31 00:39:51,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3470, PETRI_PLACES=249, PETRI_TRANSITIONS=240} [2023-08-31 00:39:51,717 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2023-08-31 00:39:51,717 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 240 transitions, 3470 flow [2023-08-31 00:39:51,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 116.16666666666667) internal successors, (2788), 24 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:39:51,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:39:51,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:39:51,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-31 00:39:51,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 00:39:51,918 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:39:51,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:39:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash 559278698, now seen corresponding path program 17 times [2023-08-31 00:39:51,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:39:51,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340535398] [2023-08-31 00:39:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:39:51,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:39:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:39:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:39:52,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:39:52,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340535398] [2023-08-31 00:39:52,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340535398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:39:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421105739] [2023-08-31 00:39:52,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:39:52,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:39:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:39:52,669 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) [2023-08-31 00:39:52,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 00:39:52,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 00:39:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:39:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 00:39:52,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:39:53,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 00:39:53,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:39:53,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:39:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:39:53,290 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 00:39:53,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2023-08-31 00:39:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:39:53,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:39:53,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:53,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-08-31 00:39:53,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:53,811 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 110 treesize of output 86 [2023-08-31 00:39:53,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:53,818 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 74 treesize of output 55 [2023-08-31 00:39:53,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:53,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 90 [2023-08-31 00:39:53,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:53,875 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 3140 treesize of output 2996 [2023-08-31 00:39:53,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:39:53,948 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 1560 treesize of output 1288 [2023-08-31 00:41:08,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:41:08,544 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 72617 treesize of output 48356 [2023-08-31 00:41:48,342 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 00:41:48,350 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 44635 treesize of output 37498 [2023-08-31 00:42:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:42:01,924 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:42:01,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58647 treesize of output 43215 [2023-08-31 00:42:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:42:06,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421105739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:42:06,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:42:06,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 32 [2023-08-31 00:42:06,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155136989] [2023-08-31 00:42:06,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:42:06,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 00:42:06,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:42:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 00:42:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=939, Unknown=3, NotChecked=0, Total=1056 [2023-08-31 00:42:08,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 324 [2023-08-31 00:42:08,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 240 transitions, 3470 flow. Second operand has 33 states, 33 states have (on average 96.66666666666667) internal successors, (3190), 33 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:08,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:42:08,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 324 [2023-08-31 00:42:08,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:42:10,689 INFO L130 PetriNetUnfolder]: 1245/2364 cut-off events. [2023-08-31 00:42:10,690 INFO L131 PetriNetUnfolder]: For 81320/81320 co-relation queries the response was YES. [2023-08-31 00:42:10,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20718 conditions, 2364 events. 1245/2364 cut-off events. For 81320/81320 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14154 event pairs, 227 based on Foata normal form. 28/2392 useless extension candidates. Maximal degree in co-relation 20606. Up to 1657 conditions per place. [2023-08-31 00:42:10,713 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 254 selfloop transitions, 76 changer transitions 1/331 dead transitions. [2023-08-31 00:42:10,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 331 transitions, 5227 flow [2023-08-31 00:42:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 00:42:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 00:42:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2029 transitions. [2023-08-31 00:42:10,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3131172839506173 [2023-08-31 00:42:10,716 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2029 transitions. [2023-08-31 00:42:10,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2029 transitions. [2023-08-31 00:42:10,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:42:10,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2029 transitions. [2023-08-31 00:42:10,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 101.45) internal successors, (2029), 20 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:10,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:10,721 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:10,721 INFO L175 Difference]: Start difference. First operand has 249 places, 240 transitions, 3470 flow. Second operand 20 states and 2029 transitions. [2023-08-31 00:42:10,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 331 transitions, 5227 flow [2023-08-31 00:42:10,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 331 transitions, 5021 flow, removed 10 selfloop flow, removed 17 redundant places. [2023-08-31 00:42:10,897 INFO L231 Difference]: Finished difference. Result has 255 places, 260 transitions, 3844 flow [2023-08-31 00:42:10,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3844, PETRI_PLACES=255, PETRI_TRANSITIONS=260} [2023-08-31 00:42:10,898 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2023-08-31 00:42:10,898 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 260 transitions, 3844 flow [2023-08-31 00:42:10,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 96.66666666666667) internal successors, (3190), 33 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:10,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:42:10,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:42:10,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 00:42:11,099 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,SelfDestructingSolverStorable38 [2023-08-31 00:42:11,099 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:42:11,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:42:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1611664731, now seen corresponding path program 8 times [2023-08-31 00:42:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:42:11,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69158192] [2023-08-31 00:42:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:42:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:42:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:42:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:11,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:42:11,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69158192] [2023-08-31 00:42:11,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69158192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:42:11,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930882340] [2023-08-31 00:42:11,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:42:11,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:42:11,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:42:11,533 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) [2023-08-31 00:42:11,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 00:42:11,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:42:11,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:42:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 00:42:11,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:42:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:42:11,890 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 14 treesize of output 16 [2023-08-31 00:42:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:11,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:42:12,030 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1579 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1579))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4))))) (= (select .cse2 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2023-08-31 00:42:12,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:12,062 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 156 treesize of output 178 [2023-08-31 00:42:12,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:12,080 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 88 treesize of output 89 [2023-08-31 00:42:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:12,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930882340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:42:12,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:42:12,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-08-31 00:42:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078143322] [2023-08-31 00:42:12,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:42:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 00:42:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:42:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 00:42:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=481, Unknown=1, NotChecked=44, Total=600 [2023-08-31 00:42:12,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-08-31 00:42:12,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 260 transitions, 3844 flow. Second operand has 25 states, 25 states have (on average 109.92) internal successors, (2748), 25 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:12,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:42:12,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-08-31 00:42:12,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:42:19,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:42:24,642 INFO L130 PetriNetUnfolder]: 1258/2395 cut-off events. [2023-08-31 00:42:24,642 INFO L131 PetriNetUnfolder]: For 94601/94601 co-relation queries the response was YES. [2023-08-31 00:42:24,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22138 conditions, 2395 events. 1258/2395 cut-off events. For 94601/94601 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14432 event pairs, 303 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 22020. Up to 2032 conditions per place. [2023-08-31 00:42:24,667 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 220 selfloop transitions, 71 changer transitions 13/304 dead transitions. [2023-08-31 00:42:24,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 304 transitions, 4865 flow [2023-08-31 00:42:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 00:42:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 00:42:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1488 transitions. [2023-08-31 00:42:24,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35327635327635326 [2023-08-31 00:42:24,669 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1488 transitions. [2023-08-31 00:42:24,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1488 transitions. [2023-08-31 00:42:24,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:42:24,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1488 transitions. [2023-08-31 00:42:24,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 114.46153846153847) internal successors, (1488), 13 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:24,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:24,673 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:24,673 INFO L175 Difference]: Start difference. First operand has 255 places, 260 transitions, 3844 flow. Second operand 13 states and 1488 transitions. [2023-08-31 00:42:24,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 304 transitions, 4865 flow [2023-08-31 00:42:24,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 304 transitions, 4613 flow, removed 88 selfloop flow, removed 10 redundant places. [2023-08-31 00:42:24,888 INFO L231 Difference]: Finished difference. Result has 258 places, 265 transitions, 3843 flow [2023-08-31 00:42:24,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3843, PETRI_PLACES=258, PETRI_TRANSITIONS=265} [2023-08-31 00:42:24,889 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-08-31 00:42:24,889 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 265 transitions, 3843 flow [2023-08-31 00:42:24,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 109.92) internal successors, (2748), 25 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:24,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:42:24,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:42:24,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-31 00:42:25,091 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,SelfDestructingSolverStorable39 [2023-08-31 00:42:25,091 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:42:25,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:42:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1001465655, now seen corresponding path program 9 times [2023-08-31 00:42:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:42:25,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140146832] [2023-08-31 00:42:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:42:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:42:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:42:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:25,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:42:25,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140146832] [2023-08-31 00:42:25,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140146832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:42:25,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052322892] [2023-08-31 00:42:25,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:42:25,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:42:25,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:42:25,545 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) [2023-08-31 00:42:25,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 00:42:25,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 00:42:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:42:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-31 00:42:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:42:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:42:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:42:25,904 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 00:42:25,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-08-31 00:42:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:25,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:42:25,988 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1626 (Array Int Int))) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1626)) (.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select (select .cse0 c_~B~0.base) (+ .cse1 4 c_~B~0.offset)))))) is different from false [2023-08-31 00:42:26,061 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-31 00:42:26,061 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 130 treesize of output 145 [2023-08-31 00:42:26,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:26,070 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 74 treesize of output 55 [2023-08-31 00:42:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:26,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052322892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:42:26,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:42:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-31 00:42:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43923098] [2023-08-31 00:42:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:42:26,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 00:42:26,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:42:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 00:42:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2023-08-31 00:42:26,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 324 [2023-08-31 00:42:26,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 265 transitions, 3843 flow. Second operand has 26 states, 26 states have (on average 105.84615384615384) internal successors, (2752), 26 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) [2023-08-31 00:42:26,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:42:26,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 324 [2023-08-31 00:42:26,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:42:27,405 INFO L130 PetriNetUnfolder]: 1250/2382 cut-off events. [2023-08-31 00:42:27,406 INFO L131 PetriNetUnfolder]: For 89150/89150 co-relation queries the response was YES. [2023-08-31 00:42:27,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21827 conditions, 2382 events. 1250/2382 cut-off events. For 89150/89150 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14347 event pairs, 312 based on Foata normal form. 4/2386 useless extension candidates. Maximal degree in co-relation 21710. Up to 2032 conditions per place. [2023-08-31 00:42:27,430 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 223 selfloop transitions, 64 changer transitions 13/300 dead transitions. [2023-08-31 00:42:27,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 300 transitions, 4767 flow [2023-08-31 00:42:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 00:42:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 00:42:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1221 transitions. [2023-08-31 00:42:27,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3425925925925926 [2023-08-31 00:42:27,431 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1221 transitions. [2023-08-31 00:42:27,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1221 transitions. [2023-08-31 00:42:27,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:42:27,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1221 transitions. [2023-08-31 00:42:27,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:27,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:27,434 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:27,434 INFO L175 Difference]: Start difference. First operand has 258 places, 265 transitions, 3843 flow. Second operand 11 states and 1221 transitions. [2023-08-31 00:42:27,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 300 transitions, 4767 flow [2023-08-31 00:42:27,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 300 transitions, 4600 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-31 00:42:27,658 INFO L231 Difference]: Finished difference. Result has 256 places, 263 transitions, 3790 flow [2023-08-31 00:42:27,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3790, PETRI_PLACES=256, PETRI_TRANSITIONS=263} [2023-08-31 00:42:27,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-08-31 00:42:27,659 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 263 transitions, 3790 flow [2023-08-31 00:42:27,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.84615384615384) internal successors, (2752), 26 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) [2023-08-31 00:42:27,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:42:27,659 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:42:27,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 00:42:27,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:42:27,860 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:42:27,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:42:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash 695500837, now seen corresponding path program 10 times [2023-08-31 00:42:27,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:42:27,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194350187] [2023-08-31 00:42:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:42:27,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:42:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:42:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:42:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194350187] [2023-08-31 00:42:28,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194350187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:42:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047783382] [2023-08-31 00:42:28,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:42:28,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:42:28,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:42:28,232 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) [2023-08-31 00:42:28,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 00:42:28,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:42:28,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:42:28,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:42:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:42:28,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:42:28,485 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 14 treesize of output 16 [2023-08-31 00:42:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:28,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:42:28,677 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1673 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1673))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ .cse2 ~B~0.offset 4))))))))) is different from false [2023-08-31 00:42:28,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:28,709 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 156 treesize of output 178 [2023-08-31 00:42:28,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:28,727 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 88 treesize of output 89 [2023-08-31 00:42:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047783382] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:42:29,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:42:29,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-08-31 00:42:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463808469] [2023-08-31 00:42:29,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:42:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 00:42:29,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:42:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 00:42:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2023-08-31 00:42:29,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-08-31 00:42:29,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 263 transitions, 3790 flow. Second operand has 25 states, 25 states have (on average 110.08) internal successors, (2752), 25 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) [2023-08-31 00:42:29,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:42:29,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-08-31 00:42:29,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:42:32,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:42:39,229 INFO L130 PetriNetUnfolder]: 1256/2377 cut-off events. [2023-08-31 00:42:39,229 INFO L131 PetriNetUnfolder]: For 89822/89822 co-relation queries the response was YES. [2023-08-31 00:42:39,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21867 conditions, 2377 events. 1256/2377 cut-off events. For 89822/89822 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14208 event pairs, 293 based on Foata normal form. 4/2381 useless extension candidates. Maximal degree in co-relation 21762. Up to 1951 conditions per place. [2023-08-31 00:42:39,252 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 204 selfloop transitions, 103 changer transitions 3/310 dead transitions. [2023-08-31 00:42:39,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 310 transitions, 5110 flow [2023-08-31 00:42:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 00:42:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 00:42:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1816 transitions. [2023-08-31 00:42:39,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35030864197530864 [2023-08-31 00:42:39,254 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1816 transitions. [2023-08-31 00:42:39,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1816 transitions. [2023-08-31 00:42:39,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:42:39,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1816 transitions. [2023-08-31 00:42:39,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.5) internal successors, (1816), 16 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:39,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:39,260 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:39,260 INFO L175 Difference]: Start difference. First operand has 256 places, 263 transitions, 3790 flow. Second operand 16 states and 1816 transitions. [2023-08-31 00:42:39,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 310 transitions, 5110 flow [2023-08-31 00:42:39,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 310 transitions, 4960 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-31 00:42:39,444 INFO L231 Difference]: Finished difference. Result has 263 places, 278 transitions, 4199 flow [2023-08-31 00:42:39,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4199, PETRI_PLACES=263, PETRI_TRANSITIONS=278} [2023-08-31 00:42:39,445 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2023-08-31 00:42:39,445 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 278 transitions, 4199 flow [2023-08-31 00:42:39,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 110.08) internal successors, (2752), 25 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) [2023-08-31 00:42:39,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:42:39,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:42:39,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-31 00:42:39,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:42:39,646 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:42:39,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:42:39,647 INFO L85 PathProgramCache]: Analyzing trace with hash 95734045, now seen corresponding path program 11 times [2023-08-31 00:42:39,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:42:39,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341444048] [2023-08-31 00:42:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:42:39,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:42:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:42:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:40,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:42:40,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341444048] [2023-08-31 00:42:40,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341444048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:42:40,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701600309] [2023-08-31 00:42:40,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:42:40,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:42:40,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:42:40,017 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:42:40,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-31 00:42:40,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:42:40,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:42:40,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 00:42:40,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:42:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:42:40,351 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 14 treesize of output 16 [2023-08-31 00:42:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:42:40,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:42:40,482 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1720 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1720))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 4 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4))))) (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4)))))))) is different from false [2023-08-31 00:42:40,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:40,518 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 156 treesize of output 178 [2023-08-31 00:42:40,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:40,537 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 88 treesize of output 89 [2023-08-31 00:42:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:41,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701600309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:42:41,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:42:41,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 25 [2023-08-31 00:42:41,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611168463] [2023-08-31 00:42:41,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:42:41,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 00:42:41,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:42:41,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 00:42:41,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=520, Unknown=1, NotChecked=46, Total=650 [2023-08-31 00:42:41,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 324 [2023-08-31 00:42:41,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 278 transitions, 4199 flow. Second operand has 26 states, 26 states have (on average 99.88461538461539) internal successors, (2597), 26 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:41,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:42:41,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 324 [2023-08-31 00:42:41,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:42:46,516 INFO L130 PetriNetUnfolder]: 1236/2337 cut-off events. [2023-08-31 00:42:46,516 INFO L131 PetriNetUnfolder]: For 96197/96197 co-relation queries the response was YES. [2023-08-31 00:42:46,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22401 conditions, 2337 events. 1236/2337 cut-off events. For 96197/96197 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13831 event pairs, 301 based on Foata normal form. 8/2345 useless extension candidates. Maximal degree in co-relation 22283. Up to 1997 conditions per place. [2023-08-31 00:42:46,537 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 208 selfloop transitions, 85 changer transitions 15/308 dead transitions. [2023-08-31 00:42:46,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 308 transitions, 5075 flow [2023-08-31 00:42:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 00:42:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 00:42:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1752 transitions. [2023-08-31 00:42:46,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31808278867102396 [2023-08-31 00:42:46,540 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1752 transitions. [2023-08-31 00:42:46,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1752 transitions. [2023-08-31 00:42:46,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:42:46,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1752 transitions. [2023-08-31 00:42:46,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.05882352941177) internal successors, (1752), 17 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:46,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:46,546 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:46,547 INFO L175 Difference]: Start difference. First operand has 263 places, 278 transitions, 4199 flow. Second operand 17 states and 1752 transitions. [2023-08-31 00:42:46,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 308 transitions, 5075 flow [2023-08-31 00:42:46,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 308 transitions, 4809 flow, removed 39 selfloop flow, removed 12 redundant places. [2023-08-31 00:42:46,765 INFO L231 Difference]: Finished difference. Result has 267 places, 274 transitions, 4055 flow [2023-08-31 00:42:46,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4055, PETRI_PLACES=267, PETRI_TRANSITIONS=274} [2023-08-31 00:42:46,766 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-08-31 00:42:46,766 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 274 transitions, 4055 flow [2023-08-31 00:42:46,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 99.88461538461539) internal successors, (2597), 26 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:46,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:42:46,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:42:46,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-31 00:42:46,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:42:46,972 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:42:46,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:42:46,972 INFO L85 PathProgramCache]: Analyzing trace with hash -185131032, now seen corresponding path program 18 times [2023-08-31 00:42:46,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:42:46,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389676281] [2023-08-31 00:42:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:42:46,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:42:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:42:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:42:47,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:42:47,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389676281] [2023-08-31 00:42:47,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389676281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:42:47,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801186016] [2023-08-31 00:42:47,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 00:42:47,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:42:47,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:42:47,522 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:42:47,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-31 00:42:47,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 00:42:47,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:42:47,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 00:42:47,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:42:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:42:47,891 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 14 treesize of output 16 [2023-08-31 00:42:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:48,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:42:48,239 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (+ c_~i_BA~0 1)) (.cse5 (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767) ~B~0.base) (+ ~B~0.offset .cse3))))))) (and (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 (+ ~B~0.offset .cse3)))))))) (or (< .cse4 c_~Bn~0) .cse5) (or (< .cse4 c_~An~0) .cse5)))) is different from false [2023-08-31 00:42:48,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:48,337 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 263 treesize of output 373 [2023-08-31 00:42:48,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:42:48,370 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 155 treesize of output 157 [2023-08-31 00:42:48,383 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 121 treesize of output 115 [2023-08-31 00:42:48,396 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 115 treesize of output 109 [2023-08-31 00:42:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:42:54,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801186016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:42:54,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:42:54,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2023-08-31 00:42:54,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408221500] [2023-08-31 00:42:54,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:42:54,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 00:42:54,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:42:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 00:42:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-08-31 00:42:54,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-08-31 00:42:54,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 274 transitions, 4055 flow. Second operand has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:42:54,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:42:54,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-08-31 00:42:54,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:04,210 WARN L222 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 68 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:43:09,419 WARN L222 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 60 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:43:11,942 INFO L130 PetriNetUnfolder]: 1265/2420 cut-off events. [2023-08-31 00:43:11,942 INFO L131 PetriNetUnfolder]: For 99769/99769 co-relation queries the response was YES. [2023-08-31 00:43:11,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22524 conditions, 2420 events. 1265/2420 cut-off events. For 99769/99769 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14639 event pairs, 236 based on Foata normal form. 50/2470 useless extension candidates. Maximal degree in co-relation 22405. Up to 1836 conditions per place. [2023-08-31 00:43:11,968 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 226 selfloop transitions, 117 changer transitions 4/347 dead transitions. [2023-08-31 00:43:11,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 347 transitions, 5561 flow [2023-08-31 00:43:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 00:43:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 00:43:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2401 transitions. [2023-08-31 00:43:11,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27446273433927754 [2023-08-31 00:43:11,971 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2401 transitions. [2023-08-31 00:43:11,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2401 transitions. [2023-08-31 00:43:11,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:11,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2401 transitions. [2023-08-31 00:43:11,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 88.92592592592592) internal successors, (2401), 27 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:11,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:11,978 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:11,978 INFO L175 Difference]: Start difference. First operand has 267 places, 274 transitions, 4055 flow. Second operand 27 states and 2401 transitions. [2023-08-31 00:43:11,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 347 transitions, 5561 flow [2023-08-31 00:43:12,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 347 transitions, 5256 flow, removed 31 selfloop flow, removed 19 redundant places. [2023-08-31 00:43:12,211 INFO L231 Difference]: Finished difference. Result has 280 places, 288 transitions, 4361 flow [2023-08-31 00:43:12,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4361, PETRI_PLACES=280, PETRI_TRANSITIONS=288} [2023-08-31 00:43:12,211 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2023-08-31 00:43:12,212 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 288 transitions, 4361 flow [2023-08-31 00:43:12,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:12,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:12,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:12,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:12,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-31 00:43:12,413 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:12,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1268623832, now seen corresponding path program 19 times [2023-08-31 00:43:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:12,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573748968] [2023-08-31 00:43:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:43:12,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:12,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573748968] [2023-08-31 00:43:12,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573748968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819313842] [2023-08-31 00:43:12,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 00:43:12,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:12,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:12,996 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:13,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-31 00:43:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 00:43:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 00:43:13,514 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 14 treesize of output 16 [2023-08-31 00:43:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:43:13,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:14,095 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1814 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1814) ~B~0.base) (+ ~B~0.offset .cse1)) |c_thread1Thread1of1ForFork1_#t~mem1|)))) (.cse5 (+ c_~i_BA~0 1))) (and (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1814 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1814))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (= (select .cse0 (+ ~B~0.offset .cse1)) |c_thread1Thread1of1ForFork1_#t~mem1|)) (let ((.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3 4)) (select .cse0 (+ .cse3 ~B~0.offset 4)))))))) (or .cse4 (< .cse5 c_~An~0)) (or .cse4 (< .cse5 c_~Bn~0))))) is different from false [2023-08-31 00:43:14,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:43:14,108 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 48 treesize of output 36 [2023-08-31 00:43:14,111 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 [2023-08-31 00:43:14,163 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-31 00:43:14,164 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 154 treesize of output 161 [2023-08-31 00:43:14,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:43:14,182 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 94 treesize of output 95 [2023-08-31 00:43:14,447 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 00:43:14,448 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 48 treesize of output 24 [2023-08-31 00:43:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:43:14,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819313842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:14,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:14,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2023-08-31 00:43:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365074062] [2023-08-31 00:43:14,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 00:43:14,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:14,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 00:43:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1075, Unknown=1, NotChecked=66, Total=1260 [2023-08-31 00:43:15,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-08-31 00:43:15,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 288 transitions, 4361 flow. Second operand has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:15,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:15,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-08-31 00:43:15,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:16,432 INFO L130 PetriNetUnfolder]: 1252/2370 cut-off events. [2023-08-31 00:43:16,433 INFO L131 PetriNetUnfolder]: For 127290/127290 co-relation queries the response was YES. [2023-08-31 00:43:16,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23972 conditions, 2370 events. 1252/2370 cut-off events. For 127290/127290 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14062 event pairs, 289 based on Foata normal form. 2/2372 useless extension candidates. Maximal degree in co-relation 23849. Up to 2262 conditions per place. [2023-08-31 00:43:16,456 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 245 selfloop transitions, 48 changer transitions 5/298 dead transitions. [2023-08-31 00:43:16,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 298 transitions, 5021 flow [2023-08-31 00:43:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:43:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:43:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1225 transitions. [2023-08-31 00:43:16,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2700617283950617 [2023-08-31 00:43:16,458 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1225 transitions. [2023-08-31 00:43:16,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1225 transitions. [2023-08-31 00:43:16,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:16,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1225 transitions. [2023-08-31 00:43:16,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 87.5) internal successors, (1225), 14 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:16,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:16,462 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:16,462 INFO L175 Difference]: Start difference. First operand has 280 places, 288 transitions, 4361 flow. Second operand 14 states and 1225 transitions. [2023-08-31 00:43:16,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 298 transitions, 5021 flow [2023-08-31 00:43:16,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 298 transitions, 4815 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-08-31 00:43:16,744 INFO L231 Difference]: Finished difference. Result has 276 places, 284 transitions, 4195 flow [2023-08-31 00:43:16,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4195, PETRI_PLACES=276, PETRI_TRANSITIONS=284} [2023-08-31 00:43:16,745 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-08-31 00:43:16,745 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 284 transitions, 4195 flow [2023-08-31 00:43:16,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:16,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:16,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:16,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:16,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-31 00:43:16,946 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:16,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:16,947 INFO L85 PathProgramCache]: Analyzing trace with hash 654676370, now seen corresponding path program 20 times [2023-08-31 00:43:16,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:16,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760668898] [2023-08-31 00:43:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:16,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:17,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:17,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760668898] [2023-08-31 00:43:17,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760668898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:17,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55481760] [2023-08-31 00:43:17,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:43:17,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:17,052 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:17,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-31 00:43:17,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:43:17,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:43:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 00:43:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:17,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:17,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55481760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:17,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:17,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-08-31 00:43:17,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236622623] [2023-08-31 00:43:17,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:17,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 00:43:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 00:43:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-31 00:43:17,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-08-31 00:43:17,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 284 transitions, 4195 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:17,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:17,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-08-31 00:43:17,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:18,093 INFO L130 PetriNetUnfolder]: 1578/2979 cut-off events. [2023-08-31 00:43:18,093 INFO L131 PetriNetUnfolder]: For 141074/141074 co-relation queries the response was YES. [2023-08-31 00:43:18,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28933 conditions, 2979 events. 1578/2979 cut-off events. For 141074/141074 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18627 event pairs, 258 based on Foata normal form. 5/2984 useless extension candidates. Maximal degree in co-relation 28812. Up to 2012 conditions per place. [2023-08-31 00:43:18,127 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 259 selfloop transitions, 103 changer transitions 2/364 dead transitions. [2023-08-31 00:43:18,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 364 transitions, 6108 flow [2023-08-31 00:43:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 00:43:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 00:43:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1543 transitions. [2023-08-31 00:43:18,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762345679012346 [2023-08-31 00:43:18,129 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1543 transitions. [2023-08-31 00:43:18,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1543 transitions. [2023-08-31 00:43:18,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:18,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1543 transitions. [2023-08-31 00:43:18,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 154.3) internal successors, (1543), 10 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:18,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:18,132 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:18,132 INFO L175 Difference]: Start difference. First operand has 276 places, 284 transitions, 4195 flow. Second operand 10 states and 1543 transitions. [2023-08-31 00:43:18,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 364 transitions, 6108 flow [2023-08-31 00:43:18,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 364 transitions, 5982 flow, removed 1 selfloop flow, removed 16 redundant places. [2023-08-31 00:43:18,460 INFO L231 Difference]: Finished difference. Result has 271 places, 311 transitions, 4871 flow [2023-08-31 00:43:18,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4069, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4871, PETRI_PLACES=271, PETRI_TRANSITIONS=311} [2023-08-31 00:43:18,460 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 250 predicate places. [2023-08-31 00:43:18,460 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 311 transitions, 4871 flow [2023-08-31 00:43:18,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:18,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:18,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:18,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:18,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-31 00:43:18,661 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:18,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:18,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1667538898, now seen corresponding path program 21 times [2023-08-31 00:43:18,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:18,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897272886] [2023-08-31 00:43:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:18,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:18,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:18,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897272886] [2023-08-31 00:43:18,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897272886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:18,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780174244] [2023-08-31 00:43:18,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:43:18,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:18,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:18,797 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:18,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-31 00:43:19,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 00:43:19,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:43:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 00:43:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:43:19,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:43:19,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780174244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:19,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:19,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 25 [2023-08-31 00:43:19,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254039528] [2023-08-31 00:43:19,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:19,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 00:43:19,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 00:43:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-08-31 00:43:21,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-08-31 00:43:21,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 311 transitions, 4871 flow. Second operand has 27 states, 27 states have (on average 127.33333333333333) internal successors, (3438), 27 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:21,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:21,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-08-31 00:43:21,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:22,890 INFO L130 PetriNetUnfolder]: 1804/3392 cut-off events. [2023-08-31 00:43:22,890 INFO L131 PetriNetUnfolder]: For 176309/176309 co-relation queries the response was YES. [2023-08-31 00:43:22,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34870 conditions, 3392 events. 1804/3392 cut-off events. For 176309/176309 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21944 event pairs, 106 based on Foata normal form. 15/3407 useless extension candidates. Maximal degree in co-relation 34750. Up to 1162 conditions per place. [2023-08-31 00:43:22,932 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 253 selfloop transitions, 197 changer transitions 6/456 dead transitions. [2023-08-31 00:43:22,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 456 transitions, 8200 flow [2023-08-31 00:43:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 00:43:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 00:43:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2881 transitions. [2023-08-31 00:43:22,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041806958473625 [2023-08-31 00:43:22,941 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2881 transitions. [2023-08-31 00:43:22,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2881 transitions. [2023-08-31 00:43:22,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:22,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2881 transitions. [2023-08-31 00:43:22,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 130.95454545454547) internal successors, (2881), 22 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:22,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:22,947 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:22,947 INFO L175 Difference]: Start difference. First operand has 271 places, 311 transitions, 4871 flow. Second operand 22 states and 2881 transitions. [2023-08-31 00:43:22,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 456 transitions, 8200 flow [2023-08-31 00:43:23,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 456 transitions, 7792 flow, removed 185 selfloop flow, removed 2 redundant places. [2023-08-31 00:43:23,425 INFO L231 Difference]: Finished difference. Result has 298 places, 347 transitions, 5959 flow [2023-08-31 00:43:23,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5959, PETRI_PLACES=298, PETRI_TRANSITIONS=347} [2023-08-31 00:43:23,426 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2023-08-31 00:43:23,427 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 347 transitions, 5959 flow [2023-08-31 00:43:23,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 127.33333333333333) internal successors, (3438), 27 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:23,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:23,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:23,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:23,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-31 00:43:23,637 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:23,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:23,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1628592980, now seen corresponding path program 22 times [2023-08-31 00:43:23,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:23,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433183451] [2023-08-31 00:43:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:23,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:23,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:23,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433183451] [2023-08-31 00:43:23,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433183451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:23,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34100905] [2023-08-31 00:43:23,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:43:23,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:23,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:23,768 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:23,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-31 00:43:23,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:43:23,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:43:23,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 00:43:23,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:24,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:43:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34100905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:24,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:24,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 14 [2023-08-31 00:43:24,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222954976] [2023-08-31 00:43:24,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:24,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 00:43:24,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 00:43:24,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-31 00:43:24,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-08-31 00:43:24,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 347 transitions, 5959 flow. Second operand has 16 states, 16 states have (on average 140.5625) internal successors, (2249), 16 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:24,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:24,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-08-31 00:43:24,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:25,732 INFO L130 PetriNetUnfolder]: 2288/4327 cut-off events. [2023-08-31 00:43:25,732 INFO L131 PetriNetUnfolder]: For 256485/256485 co-relation queries the response was YES. [2023-08-31 00:43:25,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47350 conditions, 4327 events. 2288/4327 cut-off events. For 256485/256485 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 29775 event pairs, 216 based on Foata normal form. 87/4414 useless extension candidates. Maximal degree in co-relation 47219. Up to 1590 conditions per place. [2023-08-31 00:43:25,787 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 316 selfloop transitions, 224 changer transitions 23/563 dead transitions. [2023-08-31 00:43:25,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 563 transitions, 11022 flow [2023-08-31 00:43:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 00:43:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 00:43:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3916 transitions. [2023-08-31 00:43:25,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476451760402378 [2023-08-31 00:43:25,790 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3916 transitions. [2023-08-31 00:43:25,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3916 transitions. [2023-08-31 00:43:25,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:25,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3916 transitions. [2023-08-31 00:43:25,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 145.03703703703704) internal successors, (3916), 27 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:25,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:25,798 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:25,798 INFO L175 Difference]: Start difference. First operand has 298 places, 347 transitions, 5959 flow. Second operand 27 states and 3916 transitions. [2023-08-31 00:43:25,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 563 transitions, 11022 flow [2023-08-31 00:43:26,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 563 transitions, 10436 flow, removed 238 selfloop flow, removed 11 redundant places. [2023-08-31 00:43:26,515 INFO L231 Difference]: Finished difference. Result has 325 places, 401 transitions, 7579 flow [2023-08-31 00:43:26,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7579, PETRI_PLACES=325, PETRI_TRANSITIONS=401} [2023-08-31 00:43:26,515 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 304 predicate places. [2023-08-31 00:43:26,515 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 401 transitions, 7579 flow [2023-08-31 00:43:26,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 140.5625) internal successors, (2249), 16 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:26,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:26,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:26,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:26,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:26,717 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:26,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:26,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1095367968, now seen corresponding path program 23 times [2023-08-31 00:43:26,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:26,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314251561] [2023-08-31 00:43:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:26,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314251561] [2023-08-31 00:43:26,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314251561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838076329] [2023-08-31 00:43:26,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:43:26,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:26,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:26,846 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:26,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-31 00:43:26,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 00:43:26,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:43:26,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 00:43:26,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:27,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:43:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838076329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:27,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:27,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-08-31 00:43:27,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719307797] [2023-08-31 00:43:27,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:27,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 00:43:27,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 00:43:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-31 00:43:27,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-08-31 00:43:27,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 401 transitions, 7579 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:27,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:27,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-08-31 00:43:27,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:28,522 INFO L130 PetriNetUnfolder]: 2638/4974 cut-off events. [2023-08-31 00:43:28,522 INFO L131 PetriNetUnfolder]: For 310555/310555 co-relation queries the response was YES. [2023-08-31 00:43:28,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56118 conditions, 4974 events. 2638/4974 cut-off events. For 310555/310555 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 34964 event pairs, 577 based on Foata normal form. 6/4980 useless extension candidates. Maximal degree in co-relation 55978. Up to 3661 conditions per place. [2023-08-31 00:43:28,596 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 377 selfloop transitions, 122 changer transitions 6/505 dead transitions. [2023-08-31 00:43:28,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 505 transitions, 10804 flow [2023-08-31 00:43:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 00:43:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 00:43:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1533 transitions. [2023-08-31 00:43:28,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47314814814814815 [2023-08-31 00:43:28,597 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1533 transitions. [2023-08-31 00:43:28,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1533 transitions. [2023-08-31 00:43:28,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:28,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1533 transitions. [2023-08-31 00:43:28,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.3) internal successors, (1533), 10 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:28,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:28,600 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:28,600 INFO L175 Difference]: Start difference. First operand has 325 places, 401 transitions, 7579 flow. Second operand 10 states and 1533 transitions. [2023-08-31 00:43:28,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 505 transitions, 10804 flow [2023-08-31 00:43:29,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 505 transitions, 9731 flow, removed 504 selfloop flow, removed 8 redundant places. [2023-08-31 00:43:29,595 INFO L231 Difference]: Finished difference. Result has 327 places, 442 transitions, 8228 flow [2023-08-31 00:43:29,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6917, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8228, PETRI_PLACES=327, PETRI_TRANSITIONS=442} [2023-08-31 00:43:29,596 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 306 predicate places. [2023-08-31 00:43:29,596 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 442 transitions, 8228 flow [2023-08-31 00:43:29,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:29,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:29,597 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:29,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:29,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-31 00:43:29,801 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:29,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:29,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1159595898, now seen corresponding path program 24 times [2023-08-31 00:43:29,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:29,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711584064] [2023-08-31 00:43:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:29,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:43:29,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711584064] [2023-08-31 00:43:29,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711584064] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935640332] [2023-08-31 00:43:29,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 00:43:29,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:29,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:29,913 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:29,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-31 00:43:30,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 00:43:30,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:43:30,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 00:43:30,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:43:30,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 00:43:30,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935640332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:30,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:30,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-08-31 00:43:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191302275] [2023-08-31 00:43:30,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:30,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 00:43:30,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 00:43:30,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-31 00:43:30,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:43:30,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 442 transitions, 8228 flow. Second operand has 21 states, 21 states have (on average 132.61904761904762) internal successors, (2785), 21 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:30,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:30,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:43:30,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:33,928 INFO L130 PetriNetUnfolder]: 5171/10276 cut-off events. [2023-08-31 00:43:33,928 INFO L131 PetriNetUnfolder]: For 530630/530630 co-relation queries the response was YES. [2023-08-31 00:43:34,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105325 conditions, 10276 events. 5171/10276 cut-off events. For 530630/530630 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 86585 event pairs, 1216 based on Foata normal form. 644/10920 useless extension candidates. Maximal degree in co-relation 105184. Up to 3935 conditions per place. [2023-08-31 00:43:34,055 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 702 selfloop transitions, 207 changer transitions 102/1011 dead transitions. [2023-08-31 00:43:34,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1011 transitions, 20158 flow [2023-08-31 00:43:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 00:43:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 00:43:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2861 transitions. [2023-08-31 00:43:34,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42048794826572605 [2023-08-31 00:43:34,057 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2861 transitions. [2023-08-31 00:43:34,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2861 transitions. [2023-08-31 00:43:34,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:34,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2861 transitions. [2023-08-31 00:43:34,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 136.23809523809524) internal successors, (2861), 21 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:34,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:34,062 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:34,062 INFO L175 Difference]: Start difference. First operand has 327 places, 442 transitions, 8228 flow. Second operand 21 states and 2861 transitions. [2023-08-31 00:43:34,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1011 transitions, 20158 flow [2023-08-31 00:43:36,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1011 transitions, 19757 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-08-31 00:43:36,319 INFO L231 Difference]: Finished difference. Result has 347 places, 589 transitions, 11535 flow [2023-08-31 00:43:36,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7876, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11535, PETRI_PLACES=347, PETRI_TRANSITIONS=589} [2023-08-31 00:43:36,320 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 326 predicate places. [2023-08-31 00:43:36,321 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 589 transitions, 11535 flow [2023-08-31 00:43:36,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 132.61904761904762) internal successors, (2785), 21 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:36,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:36,321 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:36,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:36,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-31 00:43:36,525 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:36,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1204325265, now seen corresponding path program 25 times [2023-08-31 00:43:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:36,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510196512] [2023-08-31 00:43:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:36,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:36,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510196512] [2023-08-31 00:43:36,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510196512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949844429] [2023-08-31 00:43:36,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 00:43:36,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:36,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:36,626 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:36,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-31 00:43:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 00:43:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:36,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:36,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949844429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:36,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:36,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-08-31 00:43:36,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418613271] [2023-08-31 00:43:36,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:36,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 00:43:36,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:36,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 00:43:36,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-08-31 00:43:37,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-31 00:43:37,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 589 transitions, 11535 flow. Second operand has 21 states, 21 states have (on average 132.42857142857142) internal successors, (2781), 21 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:37,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:37,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-31 00:43:37,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:39,548 INFO L130 PetriNetUnfolder]: 2923/5695 cut-off events. [2023-08-31 00:43:39,549 INFO L131 PetriNetUnfolder]: For 322458/322458 co-relation queries the response was YES. [2023-08-31 00:43:39,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61968 conditions, 5695 events. 2923/5695 cut-off events. For 322458/322458 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 41000 event pairs, 1320 based on Foata normal form. 147/5842 useless extension candidates. Maximal degree in co-relation 61819. Up to 4313 conditions per place. [2023-08-31 00:43:39,614 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 382 selfloop transitions, 8 changer transitions 305/695 dead transitions. [2023-08-31 00:43:39,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 695 transitions, 14330 flow [2023-08-31 00:43:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 00:43:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 00:43:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2838 transitions. [2023-08-31 00:43:39,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41710758377425045 [2023-08-31 00:43:39,616 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2838 transitions. [2023-08-31 00:43:39,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2838 transitions. [2023-08-31 00:43:39,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:39,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2838 transitions. [2023-08-31 00:43:39,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 135.14285714285714) internal successors, (2838), 21 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:39,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:39,621 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:39,622 INFO L175 Difference]: Start difference. First operand has 347 places, 589 transitions, 11535 flow. Second operand 21 states and 2838 transitions. [2023-08-31 00:43:39,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 695 transitions, 14330 flow [2023-08-31 00:43:40,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 695 transitions, 13988 flow, removed 144 selfloop flow, removed 10 redundant places. [2023-08-31 00:43:40,808 INFO L231 Difference]: Finished difference. Result has 359 places, 390 transitions, 7375 flow [2023-08-31 00:43:40,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9448, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7375, PETRI_PLACES=359, PETRI_TRANSITIONS=390} [2023-08-31 00:43:40,809 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 338 predicate places. [2023-08-31 00:43:40,809 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 390 transitions, 7375 flow [2023-08-31 00:43:40,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 132.42857142857142) internal successors, (2781), 21 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:40,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:40,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:40,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:41,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-31 00:43:41,016 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:41,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1913132125, now seen corresponding path program 26 times [2023-08-31 00:43:41,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:41,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857862751] [2023-08-31 00:43:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:41,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:41,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857862751] [2023-08-31 00:43:41,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857862751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910690912] [2023-08-31 00:43:41,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:43:41,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:41,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:41,245 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:41,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-31 00:43:41,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:43:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:43:41,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 00:43:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:41,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910690912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:42,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:42,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 00:43:42,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003148497] [2023-08-31 00:43:42,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:42,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 00:43:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 00:43:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-08-31 00:43:43,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-08-31 00:43:43,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 390 transitions, 7375 flow. Second operand has 30 states, 30 states have (on average 130.83333333333334) internal successors, (3925), 30 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:43,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:43,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-08-31 00:43:43,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:44,364 INFO L130 PetriNetUnfolder]: 2342/4272 cut-off events. [2023-08-31 00:43:44,364 INFO L131 PetriNetUnfolder]: For 249310/249310 co-relation queries the response was YES. [2023-08-31 00:43:44,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47451 conditions, 4272 events. 2342/4272 cut-off events. For 249310/249310 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28333 event pairs, 244 based on Foata normal form. 75/4347 useless extension candidates. Maximal degree in co-relation 47299. Up to 1367 conditions per place. [2023-08-31 00:43:44,500 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 322 selfloop transitions, 158 changer transitions 1/481 dead transitions. [2023-08-31 00:43:44,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 481 transitions, 9844 flow [2023-08-31 00:43:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 00:43:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 00:43:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1738 transitions. [2023-08-31 00:43:44,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263057929724595 [2023-08-31 00:43:44,505 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1738 transitions. [2023-08-31 00:43:44,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1738 transitions. [2023-08-31 00:43:44,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:44,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1738 transitions. [2023-08-31 00:43:44,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.69230769230768) internal successors, (1738), 13 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:44,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:44,510 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:44,510 INFO L175 Difference]: Start difference. First operand has 359 places, 390 transitions, 7375 flow. Second operand 13 states and 1738 transitions. [2023-08-31 00:43:44,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 481 transitions, 9844 flow [2023-08-31 00:43:45,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 481 transitions, 9362 flow, removed 176 selfloop flow, removed 36 redundant places. [2023-08-31 00:43:45,166 INFO L231 Difference]: Finished difference. Result has 297 places, 401 transitions, 7684 flow [2023-08-31 00:43:45,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7684, PETRI_PLACES=297, PETRI_TRANSITIONS=401} [2023-08-31 00:43:45,166 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2023-08-31 00:43:45,167 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 401 transitions, 7684 flow [2023-08-31 00:43:45,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 130.83333333333334) internal successors, (3925), 30 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:45,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:45,168 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:45,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:45,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:45,377 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:45,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash -326833819, now seen corresponding path program 12 times [2023-08-31 00:43:45,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:45,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39030246] [2023-08-31 00:43:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:45,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:43:45,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:45,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39030246] [2023-08-31 00:43:45,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39030246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:45,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585802028] [2023-08-31 00:43:45,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 00:43:45,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:45,851 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:45,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-31 00:43:46,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 00:43:46,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:43:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 00:43:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:43:46,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:46,568 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:43:46,568 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 42 treesize of output 60 [2023-08-31 00:43:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:43:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585802028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:46,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:46,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 27 [2023-08-31 00:43:46,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554855853] [2023-08-31 00:43:46,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:46,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 00:43:46,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 00:43:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2023-08-31 00:43:48,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-31 00:43:48,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 401 transitions, 7684 flow. Second operand has 28 states, 28 states have (on average 128.10714285714286) internal successors, (3587), 28 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:48,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:48,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-31 00:43:48,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:43:50,262 INFO L130 PetriNetUnfolder]: 2371/4349 cut-off events. [2023-08-31 00:43:50,262 INFO L131 PetriNetUnfolder]: For 247719/247719 co-relation queries the response was YES. [2023-08-31 00:43:50,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47765 conditions, 4349 events. 2371/4349 cut-off events. For 247719/247719 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 29079 event pairs, 475 based on Foata normal form. 8/4357 useless extension candidates. Maximal degree in co-relation 47635. Up to 3446 conditions per place. [2023-08-31 00:43:50,432 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 353 selfloop transitions, 126 changer transitions 29/508 dead transitions. [2023-08-31 00:43:50,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 508 transitions, 10138 flow [2023-08-31 00:43:50,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 00:43:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 00:43:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2517 transitions. [2023-08-31 00:43:50,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408869395711501 [2023-08-31 00:43:50,435 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2517 transitions. [2023-08-31 00:43:50,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2517 transitions. [2023-08-31 00:43:50,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:43:50,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2517 transitions. [2023-08-31 00:43:50,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 132.47368421052633) internal successors, (2517), 19 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:50,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:50,441 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:50,441 INFO L175 Difference]: Start difference. First operand has 297 places, 401 transitions, 7684 flow. Second operand 19 states and 2517 transitions. [2023-08-31 00:43:50,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 508 transitions, 10138 flow [2023-08-31 00:43:51,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 508 transitions, 9961 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-08-31 00:43:51,130 INFO L231 Difference]: Finished difference. Result has 309 places, 427 transitions, 8186 flow [2023-08-31 00:43:51,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8186, PETRI_PLACES=309, PETRI_TRANSITIONS=427} [2023-08-31 00:43:51,131 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-08-31 00:43:51,131 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 427 transitions, 8186 flow [2023-08-31 00:43:51,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 128.10714285714286) internal successors, (3587), 28 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:51,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:43:51,132 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:43:51,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-31 00:43:51,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:51,339 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:43:51,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:43:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1977088976, now seen corresponding path program 27 times [2023-08-31 00:43:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:43:51,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104474797] [2023-08-31 00:43:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:43:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:43:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:43:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:43:52,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:43:52,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104474797] [2023-08-31 00:43:52,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104474797] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:43:52,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951044372] [2023-08-31 00:43:52,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:43:52,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:43:52,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:43:52,163 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:43:52,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-31 00:43:52,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 00:43:52,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:43:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 00:43:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:43:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:43:53,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:43:53,430 INFO L321 Elim1Store]: treesize reduction 26, result has 86.7 percent of original size [2023-08-31 00:43:53,431 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 95 treesize of output 198 [2023-08-31 00:43:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:43:54,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951044372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:43:54,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:43:54,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2023-08-31 00:43:54,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365548830] [2023-08-31 00:43:54,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:43:54,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-31 00:43:54,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:43:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-31 00:43:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2023-08-31 00:43:58,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-31 00:43:58,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 427 transitions, 8186 flow. Second operand has 45 states, 45 states have (on average 113.53333333333333) internal successors, (5109), 45 states have internal predecessors, (5109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:43:58,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:43:58,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-31 00:43:58,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:44:05,300 INFO L130 PetriNetUnfolder]: 3676/6705 cut-off events. [2023-08-31 00:44:05,301 INFO L131 PetriNetUnfolder]: For 370050/370050 co-relation queries the response was YES. [2023-08-31 00:44:05,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73743 conditions, 6705 events. 3676/6705 cut-off events. For 370050/370050 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48256 event pairs, 174 based on Foata normal form. 34/6739 useless extension candidates. Maximal degree in co-relation 73609. Up to 3502 conditions per place. [2023-08-31 00:44:05,385 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 435 selfloop transitions, 522 changer transitions 6/963 dead transitions. [2023-08-31 00:44:05,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 963 transitions, 18547 flow [2023-08-31 00:44:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-31 00:44:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-31 00:44:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 7536 transitions. [2023-08-31 00:44:05,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36342592592592593 [2023-08-31 00:44:05,389 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 7536 transitions. [2023-08-31 00:44:05,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 7536 transitions. [2023-08-31 00:44:05,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:44:05,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 7536 transitions. [2023-08-31 00:44:05,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 117.75) internal successors, (7536), 64 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:05,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 324.0) internal successors, (21060), 65 states have internal predecessors, (21060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:05,405 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 324.0) internal successors, (21060), 65 states have internal predecessors, (21060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:05,405 INFO L175 Difference]: Start difference. First operand has 309 places, 427 transitions, 8186 flow. Second operand 64 states and 7536 transitions. [2023-08-31 00:44:05,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 963 transitions, 18547 flow [2023-08-31 00:44:06,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 963 transitions, 18034 flow, removed 114 selfloop flow, removed 9 redundant places. [2023-08-31 00:44:06,918 INFO L231 Difference]: Finished difference. Result has 382 places, 747 transitions, 15947 flow [2023-08-31 00:44:06,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7953, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=15947, PETRI_PLACES=382, PETRI_TRANSITIONS=747} [2023-08-31 00:44:06,920 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2023-08-31 00:44:06,920 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 747 transitions, 15947 flow [2023-08-31 00:44:06,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 113.53333333333333) internal successors, (5109), 45 states have internal predecessors, (5109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:06,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:44:06,921 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:44:06,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-31 00:44:07,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:44:07,128 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:44:07,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:44:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash -456294063, now seen corresponding path program 13 times [2023-08-31 00:44:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:44:07,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689907024] [2023-08-31 00:44:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:44:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:44:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:44:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:44:07,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:44:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689907024] [2023-08-31 00:44:07,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689907024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:44:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708948325] [2023-08-31 00:44:07,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 00:44:07,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:44:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:44:07,587 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:44:07,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-31 00:44:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:44:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 00:44:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:44:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:44:08,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:44:08,209 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:44:08,209 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 42 treesize of output 60 [2023-08-31 00:44:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:44:08,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708948325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:44:08,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:44:08,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 8] total 29 [2023-08-31 00:44:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986032209] [2023-08-31 00:44:08,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:44:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 00:44:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:44:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 00:44:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-08-31 00:44:10,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-31 00:44:10,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 747 transitions, 15947 flow. Second operand has 30 states, 30 states have (on average 128.2) internal successors, (3846), 30 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:10,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:44:10,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-31 00:44:10,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:44:14,203 INFO L130 PetriNetUnfolder]: 3724/6801 cut-off events. [2023-08-31 00:44:14,203 INFO L131 PetriNetUnfolder]: For 494060/494060 co-relation queries the response was YES. [2023-08-31 00:44:14,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83118 conditions, 6801 events. 3724/6801 cut-off events. For 494060/494060 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 49038 event pairs, 742 based on Foata normal form. 12/6813 useless extension candidates. Maximal degree in co-relation 82962. Up to 5398 conditions per place. [2023-08-31 00:44:14,294 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 563 selfloop transitions, 248 changer transitions 27/838 dead transitions. [2023-08-31 00:44:14,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 838 transitions, 19145 flow [2023-08-31 00:44:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 00:44:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 00:44:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2644 transitions. [2023-08-31 00:44:14,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080246913580247 [2023-08-31 00:44:14,296 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2644 transitions. [2023-08-31 00:44:14,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2644 transitions. [2023-08-31 00:44:14,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:44:14,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2644 transitions. [2023-08-31 00:44:14,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.2) internal successors, (2644), 20 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:14,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:14,301 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:14,301 INFO L175 Difference]: Start difference. First operand has 382 places, 747 transitions, 15947 flow. Second operand 20 states and 2644 transitions. [2023-08-31 00:44:14,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 838 transitions, 19145 flow [2023-08-31 00:44:16,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 838 transitions, 18080 flow, removed 514 selfloop flow, removed 9 redundant places. [2023-08-31 00:44:16,457 INFO L231 Difference]: Finished difference. Result has 395 places, 764 transitions, 15857 flow [2023-08-31 00:44:16,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=14886, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15857, PETRI_PLACES=395, PETRI_TRANSITIONS=764} [2023-08-31 00:44:16,458 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 374 predicate places. [2023-08-31 00:44:16,458 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 764 transitions, 15857 flow [2023-08-31 00:44:16,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 128.2) internal successors, (3846), 30 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:16,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:44:16,459 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:44:16,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-31 00:44:16,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-31 00:44:16,666 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:44:16,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:44:16,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1588312397, now seen corresponding path program 14 times [2023-08-31 00:44:16,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:44:16,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378300346] [2023-08-31 00:44:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:44:16,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:44:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:44:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:44:17,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:44:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378300346] [2023-08-31 00:44:17,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378300346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:44:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361424725] [2023-08-31 00:44:17,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:44:17,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:44:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:44:17,098 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:44:17,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-31 00:44:17,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:44:17,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:44:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 00:44:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:44:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:44:17,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:44:17,698 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:44:17,698 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 42 treesize of output 60 [2023-08-31 00:44:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:44:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361424725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:44:17,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:44:17,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2023-08-31 00:44:17,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088552183] [2023-08-31 00:44:17,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:44:17,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 00:44:17,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:44:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 00:44:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2023-08-31 00:44:20,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-31 00:44:20,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 764 transitions, 15857 flow. Second operand has 29 states, 29 states have (on average 128.10344827586206) internal successors, (3715), 29 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:20,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:44:20,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-31 00:44:20,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:44:24,692 INFO L130 PetriNetUnfolder]: 3704/6758 cut-off events. [2023-08-31 00:44:24,692 INFO L131 PetriNetUnfolder]: For 503076/503076 co-relation queries the response was YES. [2023-08-31 00:44:24,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82092 conditions, 6758 events. 3704/6758 cut-off events. For 503076/503076 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 48854 event pairs, 726 based on Foata normal form. 12/6770 useless extension candidates. Maximal degree in co-relation 81932. Up to 5320 conditions per place. [2023-08-31 00:44:24,789 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 556 selfloop transitions, 281 changer transitions 2/839 dead transitions. [2023-08-31 00:44:24,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 839 transitions, 19134 flow [2023-08-31 00:44:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 00:44:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 00:44:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3030 transitions. [2023-08-31 00:44:24,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40660225442834136 [2023-08-31 00:44:24,792 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3030 transitions. [2023-08-31 00:44:24,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3030 transitions. [2023-08-31 00:44:24,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:44:24,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3030 transitions. [2023-08-31 00:44:24,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 131.7391304347826) internal successors, (3030), 23 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:24,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:24,798 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:24,798 INFO L175 Difference]: Start difference. First operand has 395 places, 764 transitions, 15857 flow. Second operand 23 states and 3030 transitions. [2023-08-31 00:44:24,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 839 transitions, 19134 flow [2023-08-31 00:44:26,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 839 transitions, 18635 flow, removed 50 selfloop flow, removed 14 redundant places. [2023-08-31 00:44:26,973 INFO L231 Difference]: Finished difference. Result has 405 places, 778 transitions, 16442 flow [2023-08-31 00:44:26,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=15390, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=16442, PETRI_PLACES=405, PETRI_TRANSITIONS=778} [2023-08-31 00:44:26,974 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 384 predicate places. [2023-08-31 00:44:26,974 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 778 transitions, 16442 flow [2023-08-31 00:44:26,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 128.10344827586206) internal successors, (3715), 29 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:26,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:44:26,975 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:44:26,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-31 00:44:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-31 00:44:27,176 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:44:27,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:44:27,176 INFO L85 PathProgramCache]: Analyzing trace with hash 93397669, now seen corresponding path program 15 times [2023-08-31 00:44:27,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:44:27,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363736235] [2023-08-31 00:44:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:44:27,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:44:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:44:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:44:27,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:44:27,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363736235] [2023-08-31 00:44:27,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363736235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:44:27,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220561233] [2023-08-31 00:44:27,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:44:27,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:44:27,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:44:27,571 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:44:27,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-31 00:44:27,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 00:44:27,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:44:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 00:44:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:44:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:44:28,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:44:28,577 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:44:28,578 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 42 treesize of output 60 [2023-08-31 00:44:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:44:28,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220561233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:44:28,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:44:28,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 37 [2023-08-31 00:44:28,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415853442] [2023-08-31 00:44:28,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:44:28,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 00:44:28,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:44:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 00:44:28,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2023-08-31 00:44:33,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 324 [2023-08-31 00:44:33,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 778 transitions, 16442 flow. Second operand has 38 states, 38 states have (on average 118.76315789473684) internal successors, (4513), 38 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:33,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:44:33,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 324 [2023-08-31 00:44:33,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:44:38,632 INFO L130 PetriNetUnfolder]: 5891/10784 cut-off events. [2023-08-31 00:44:38,632 INFO L131 PetriNetUnfolder]: For 733896/733896 co-relation queries the response was YES. [2023-08-31 00:44:38,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125061 conditions, 10784 events. 5891/10784 cut-off events. For 733896/733896 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 84316 event pairs, 1069 based on Foata normal form. 37/10821 useless extension candidates. Maximal degree in co-relation 123994. Up to 6637 conditions per place. [2023-08-31 00:44:38,918 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 833 selfloop transitions, 664 changer transitions 20/1517 dead transitions. [2023-08-31 00:44:38,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1517 transitions, 33706 flow [2023-08-31 00:44:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-31 00:44:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-31 00:44:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6362 transitions. [2023-08-31 00:44:38,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776115859449193 [2023-08-31 00:44:38,923 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6362 transitions. [2023-08-31 00:44:38,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6362 transitions. [2023-08-31 00:44:38,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:44:38,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6362 transitions. [2023-08-31 00:44:38,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 122.34615384615384) internal successors, (6362), 52 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:38,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 324.0) internal successors, (17172), 53 states have internal predecessors, (17172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:38,944 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 324.0) internal successors, (17172), 53 states have internal predecessors, (17172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:38,944 INFO L175 Difference]: Start difference. First operand has 405 places, 778 transitions, 16442 flow. Second operand 52 states and 6362 transitions. [2023-08-31 00:44:38,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1517 transitions, 33706 flow [2023-08-31 00:44:43,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1517 transitions, 32575 flow, removed 160 selfloop flow, removed 15 redundant places. [2023-08-31 00:44:43,255 INFO L231 Difference]: Finished difference. Result has 463 places, 1330 transitions, 29618 flow [2023-08-31 00:44:43,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=15932, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=29618, PETRI_PLACES=463, PETRI_TRANSITIONS=1330} [2023-08-31 00:44:43,256 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 442 predicate places. [2023-08-31 00:44:43,256 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 1330 transitions, 29618 flow [2023-08-31 00:44:43,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 118.76315789473684) internal successors, (4513), 38 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:43,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:44:43,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:44:43,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-31 00:44:43,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-31 00:44:43,458 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:44:43,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:44:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1305015792, now seen corresponding path program 28 times [2023-08-31 00:44:43,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:44:43,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629822069] [2023-08-31 00:44:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:44:43,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:44:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:44:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:44:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:44:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629822069] [2023-08-31 00:44:44,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629822069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:44:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888775481] [2023-08-31 00:44:44,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:44:44,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:44:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:44:44,064 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:44:44,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-31 00:44:44,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:44:44,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:44:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 00:44:44,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:44:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:44:44,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:44:45,037 INFO L321 Elim1Store]: treesize reduction 15, result has 93.1 percent of original size [2023-08-31 00:44:45,037 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 95 treesize of output 232 [2023-08-31 00:44:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:44:55,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888775481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:44:55,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:44:55,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 32 [2023-08-31 00:44:55,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058125189] [2023-08-31 00:44:55,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:44:55,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 00:44:55,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:44:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 00:44:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 00:44:59,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-31 00:44:59,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1330 transitions, 29618 flow. Second operand has 33 states, 33 states have (on average 115.9090909090909) internal successors, (3825), 33 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:44:59,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:44:59,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-31 00:44:59,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:45:04,354 INFO L130 PetriNetUnfolder]: 5813/10563 cut-off events. [2023-08-31 00:45:04,354 INFO L131 PetriNetUnfolder]: For 794834/794834 co-relation queries the response was YES. [2023-08-31 00:45:04,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128702 conditions, 10563 events. 5813/10563 cut-off events. For 794834/794834 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 81630 event pairs, 1007 based on Foata normal form. 32/10595 useless extension candidates. Maximal degree in co-relation 128424. Up to 7880 conditions per place. [2023-08-31 00:45:04,567 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 830 selfloop transitions, 535 changer transitions 11/1376 dead transitions. [2023-08-31 00:45:04,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1376 transitions, 33140 flow [2023-08-31 00:45:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 00:45:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 00:45:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3200 transitions. [2023-08-31 00:45:04,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36579789666209417 [2023-08-31 00:45:04,569 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3200 transitions. [2023-08-31 00:45:04,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3200 transitions. [2023-08-31 00:45:04,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:45:04,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3200 transitions. [2023-08-31 00:45:04,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 118.51851851851852) internal successors, (3200), 27 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:04,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:04,579 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:04,579 INFO L175 Difference]: Start difference. First operand has 463 places, 1330 transitions, 29618 flow. Second operand 27 states and 3200 transitions. [2023-08-31 00:45:04,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1376 transitions, 33140 flow [2023-08-31 00:45:10,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 1376 transitions, 32181 flow, removed 426 selfloop flow, removed 13 redundant places. [2023-08-31 00:45:10,783 INFO L231 Difference]: Finished difference. Result has 475 places, 1322 transitions, 29639 flow [2023-08-31 00:45:10,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=28503, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29639, PETRI_PLACES=475, PETRI_TRANSITIONS=1322} [2023-08-31 00:45:10,785 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 454 predicate places. [2023-08-31 00:45:10,785 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 1322 transitions, 29639 flow [2023-08-31 00:45:10,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 115.9090909090909) internal successors, (3825), 33 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:10,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:45:10,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:45:10,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-31 00:45:10,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-31 00:45:10,993 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:45:10,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:45:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash -953429951, now seen corresponding path program 16 times [2023-08-31 00:45:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:45:10,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995505574] [2023-08-31 00:45:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:45:10,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:45:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:45:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:45:11,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:45:11,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995505574] [2023-08-31 00:45:11,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995505574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:45:11,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344075241] [2023-08-31 00:45:11,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:45:11,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:45:11,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:45:11,410 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:45:11,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-31 00:45:11,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:45:11,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:45:11,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:45:11,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:45:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:45:11,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:45:11,916 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:45:11,916 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 42 treesize of output 60 [2023-08-31 00:45:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-31 00:45:11,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344075241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:45:11,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:45:11,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 26 [2023-08-31 00:45:11,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699333035] [2023-08-31 00:45:11,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:45:11,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 00:45:11,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:45:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 00:45:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-08-31 00:45:13,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-31 00:45:13,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 1322 transitions, 29639 flow. Second operand has 27 states, 27 states have (on average 128.25925925925927) internal successors, (3463), 27 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:13,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:45:13,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-31 00:45:13,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:45:18,923 INFO L130 PetriNetUnfolder]: 5852/10655 cut-off events. [2023-08-31 00:45:18,923 INFO L131 PetriNetUnfolder]: For 804193/804193 co-relation queries the response was YES. [2023-08-31 00:45:19,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129731 conditions, 10655 events. 5852/10655 cut-off events. For 804193/804193 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 82474 event pairs, 1018 based on Foata normal form. 40/10695 useless extension candidates. Maximal degree in co-relation 129545. Up to 7874 conditions per place. [2023-08-31 00:45:19,116 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 874 selfloop transitions, 540 changer transitions 20/1434 dead transitions. [2023-08-31 00:45:19,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1434 transitions, 35210 flow [2023-08-31 00:45:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 00:45:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 00:45:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3172 transitions. [2023-08-31 00:45:19,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079218106995885 [2023-08-31 00:45:19,119 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3172 transitions. [2023-08-31 00:45:19,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3172 transitions. [2023-08-31 00:45:19,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:45:19,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3172 transitions. [2023-08-31 00:45:19,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.16666666666666) internal successors, (3172), 24 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:19,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 324.0) internal successors, (8100), 25 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:19,125 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 324.0) internal successors, (8100), 25 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:19,125 INFO L175 Difference]: Start difference. First operand has 475 places, 1322 transitions, 29639 flow. Second operand 24 states and 3172 transitions. [2023-08-31 00:45:19,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1434 transitions, 35210 flow [2023-08-31 00:45:24,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1434 transitions, 33773 flow, removed 90 selfloop flow, removed 28 redundant places. [2023-08-31 00:45:24,204 INFO L231 Difference]: Finished difference. Result has 466 places, 1361 transitions, 30918 flow [2023-08-31 00:45:24,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=28249, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=30918, PETRI_PLACES=466, PETRI_TRANSITIONS=1361} [2023-08-31 00:45:24,206 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 445 predicate places. [2023-08-31 00:45:24,206 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1361 transitions, 30918 flow [2023-08-31 00:45:24,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 128.25925925925927) internal successors, (3463), 27 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:24,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:45:24,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:45:24,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-31 00:45:24,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-31 00:45:24,413 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:45:24,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:45:24,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2133455558, now seen corresponding path program 29 times [2023-08-31 00:45:24,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:45:24,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767336463] [2023-08-31 00:45:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:45:24,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:45:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:45:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:45:25,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:45:25,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767336463] [2023-08-31 00:45:25,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767336463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:45:25,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630378007] [2023-08-31 00:45:25,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:45:25,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:45:25,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:45:25,117 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:45:25,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-31 00:45:25,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 00:45:25,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:45:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 00:45:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:45:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:45:25,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:45:25,908 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-08-31 00:45:25,909 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 95 treesize of output 183 [2023-08-31 00:45:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:45:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630378007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:45:26,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:45:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 31 [2023-08-31 00:45:26,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216369290] [2023-08-31 00:45:26,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:45:26,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 00:45:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:45:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 00:45:26,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-08-31 00:45:29,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-08-31 00:45:29,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1361 transitions, 30918 flow. Second operand has 32 states, 32 states have (on average 114.96875) internal successors, (3679), 32 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:29,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:45:29,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-08-31 00:45:29,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:45:36,279 INFO L130 PetriNetUnfolder]: 6122/11135 cut-off events. [2023-08-31 00:45:36,279 INFO L131 PetriNetUnfolder]: For 907820/907820 co-relation queries the response was YES. [2023-08-31 00:45:36,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133891 conditions, 11135 events. 6122/11135 cut-off events. For 907820/907820 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 86475 event pairs, 944 based on Foata normal form. 240/11375 useless extension candidates. Maximal degree in co-relation 133705. Up to 7534 conditions per place. [2023-08-31 00:45:36,522 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 855 selfloop transitions, 747 changer transitions 8/1610 dead transitions. [2023-08-31 00:45:36,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1610 transitions, 39027 flow [2023-08-31 00:45:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 00:45:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 00:45:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5099 transitions. [2023-08-31 00:45:36,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36599196095320125 [2023-08-31 00:45:36,526 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5099 transitions. [2023-08-31 00:45:36,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5099 transitions. [2023-08-31 00:45:36,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:45:36,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5099 transitions. [2023-08-31 00:45:36,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 118.5813953488372) internal successors, (5099), 43 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:36,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 324.0) internal successors, (14256), 44 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:36,536 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 324.0) internal successors, (14256), 44 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:36,536 INFO L175 Difference]: Start difference. First operand has 466 places, 1361 transitions, 30918 flow. Second operand 43 states and 5099 transitions. [2023-08-31 00:45:36,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1610 transitions, 39027 flow [2023-08-31 00:45:41,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1610 transitions, 37987 flow, removed 58 selfloop flow, removed 13 redundant places. [2023-08-31 00:45:41,485 INFO L231 Difference]: Finished difference. Result has 507 places, 1460 transitions, 34455 flow [2023-08-31 00:45:41,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=29996, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=652, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=34455, PETRI_PLACES=507, PETRI_TRANSITIONS=1460} [2023-08-31 00:45:41,486 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 486 predicate places. [2023-08-31 00:45:41,486 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1460 transitions, 34455 flow [2023-08-31 00:45:41,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 114.96875) internal successors, (3679), 32 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:41,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:45:41,487 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:45:41,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-31 00:45:41,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-31 00:45:41,688 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:45:41,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:45:41,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1897646832, now seen corresponding path program 30 times [2023-08-31 00:45:41,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:45:41,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524414334] [2023-08-31 00:45:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:45:41,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:45:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:45:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:45:42,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:45:42,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524414334] [2023-08-31 00:45:42,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524414334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:45:42,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785706127] [2023-08-31 00:45:42,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 00:45:42,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:45:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:45:42,311 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:45:42,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-31 00:45:42,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 00:45:42,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:45:42,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-31 00:45:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:45:42,887 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 13 treesize of output 9 [2023-08-31 00:45:42,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:45:43,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 00:45:43,396 INFO L321 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2023-08-31 00:45:43,396 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 49 treesize of output 41 [2023-08-31 00:45:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:45:43,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:45:44,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:45:44,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-08-31 00:45:44,840 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:45:44,840 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 1740 treesize of output 1520 [2023-08-31 00:45:44,902 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:45:44,903 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:45:44,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:45:44,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 670 [2023-08-31 00:45:44,940 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:45:44,941 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:45:44,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:45:44,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 620 treesize of output 462 [2023-08-31 00:45:47,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:45:47,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-08-31 00:45:47,370 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:45:47,370 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 1740 treesize of output 1520 [2023-08-31 00:45:47,412 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:45:47,413 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:45:47,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:45:47,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 566 [2023-08-31 00:45:47,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:45:47,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 00:45:47,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 00:45:47,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 516 treesize of output 462 [2023-08-31 00:45:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 00:45:49,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785706127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:45:49,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:45:49,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-31 00:45:49,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256075628] [2023-08-31 00:45:49,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:45:49,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-31 00:45:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:45:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-31 00:45:49,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1978, Unknown=5, NotChecked=0, Total=2352 [2023-08-31 00:45:56,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-08-31 00:45:56,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1460 transitions, 34455 flow. Second operand has 49 states, 49 states have (on average 81.57142857142857) internal successors, (3997), 49 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:45:56,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:45:56,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-08-31 00:45:56,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:46:09,363 WARN L222 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:46:30,237 WARN L222 SmtUtils]: Spent 14.44s on a formula simplification. DAG size of input: 98 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:46:45,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 00:46:47,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:47:02,277 WARN L222 SmtUtils]: Spent 12.41s on a formula simplification. DAG size of input: 82 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:47:15,808 WARN L222 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 88 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:47:26,198 INFO L130 PetriNetUnfolder]: 12499/23134 cut-off events. [2023-08-31 00:47:26,199 INFO L131 PetriNetUnfolder]: For 3480754/3480754 co-relation queries the response was YES. [2023-08-31 00:47:26,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330362 conditions, 23134 events. 12499/23134 cut-off events. For 3480754/3480754 co-relation queries the response was YES. Maximal size of possible extension queue 1414. Compared 207844 event pairs, 363 based on Foata normal form. 321/23455 useless extension candidates. Maximal degree in co-relation 330162. Up to 6063 conditions per place. [2023-08-31 00:47:26,728 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 1030 selfloop transitions, 2362 changer transitions 50/3442 dead transitions. [2023-08-31 00:47:26,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 3442 transitions, 86646 flow [2023-08-31 00:47:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-08-31 00:47:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2023-08-31 00:47:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 10713 transitions. [2023-08-31 00:47:26,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26451851851851854 [2023-08-31 00:47:26,735 INFO L72 ComplementDD]: Start complementDD. Operand 125 states and 10713 transitions. [2023-08-31 00:47:26,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 10713 transitions. [2023-08-31 00:47:26,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:26,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 125 states and 10713 transitions. [2023-08-31 00:47:26,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 126 states, 125 states have (on average 85.704) internal successors, (10713), 125 states have internal predecessors, (10713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:26,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 126 states, 126 states have (on average 324.0) internal successors, (40824), 126 states have internal predecessors, (40824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:26,763 INFO L81 ComplementDD]: Finished complementDD. Result has 126 states, 126 states have (on average 324.0) internal successors, (40824), 126 states have internal predecessors, (40824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:26,763 INFO L175 Difference]: Start difference. First operand has 507 places, 1460 transitions, 34455 flow. Second operand 125 states and 10713 transitions. [2023-08-31 00:47:26,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 3442 transitions, 86646 flow [2023-08-31 00:47:44,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 3442 transitions, 82065 flow, removed 868 selfloop flow, removed 19 redundant places. [2023-08-31 00:47:44,556 INFO L231 Difference]: Finished difference. Result has 659 places, 2812 transitions, 74088 flow [2023-08-31 00:47:44,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=32290, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=74088, PETRI_PLACES=659, PETRI_TRANSITIONS=2812} [2023-08-31 00:47:44,557 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 638 predicate places. [2023-08-31 00:47:44,557 INFO L495 AbstractCegarLoop]: Abstraction has has 659 places, 2812 transitions, 74088 flow [2023-08-31 00:47:44,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 81.57142857142857) internal successors, (3997), 49 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:44,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:44,558 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:44,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-31 00:47:44,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:44,758 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:47:44,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:44,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2023043557, now seen corresponding path program 17 times [2023-08-31 00:47:44,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:44,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35111166] [2023-08-31 00:47:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:44,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:47:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:45,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35111166] [2023-08-31 00:47:45,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35111166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:47:45,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020123659] [2023-08-31 00:47:45,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:47:45,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:45,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:45,169 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:47:45,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-31 00:47:45,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 00:47:45,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:47:45,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 00:47:45,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:47:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:47:45,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:47:45,675 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 00:47:45,675 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 40 treesize of output 56 [2023-08-31 00:47:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:47:45,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020123659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:47:45,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:47:45,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 22 [2023-08-31 00:47:45,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915830585] [2023-08-31 00:47:45,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:47:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 00:47:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:45,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 00:47:45,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-08-31 00:47:46,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-31 00:47:46,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 2812 transitions, 74088 flow. Second operand has 23 states, 23 states have (on average 128.2608695652174) internal successors, (2950), 23 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:46,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:46,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-31 00:47:46,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:48:06,241 INFO L130 PetriNetUnfolder]: 12793/23748 cut-off events. [2023-08-31 00:48:06,241 INFO L131 PetriNetUnfolder]: For 5956087/5956087 co-relation queries the response was YES. [2023-08-31 00:48:06,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412325 conditions, 23748 events. 12793/23748 cut-off events. For 5956087/5956087 co-relation queries the response was YES. Maximal size of possible extension queue 1470. Compared 214619 event pairs, 1828 based on Foata normal form. 52/23800 useless extension candidates. Maximal degree in co-relation 412078. Up to 15577 conditions per place. [2023-08-31 00:48:06,842 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 1839 selfloop transitions, 1189 changer transitions 7/3035 dead transitions. [2023-08-31 00:48:06,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 3035 transitions, 87451 flow [2023-08-31 00:48:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 00:48:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 00:48:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2931 transitions. [2023-08-31 00:48:06,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41119528619528617 [2023-08-31 00:48:06,845 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2931 transitions. [2023-08-31 00:48:06,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2931 transitions. [2023-08-31 00:48:06,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:48:06,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2931 transitions. [2023-08-31 00:48:06,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 133.22727272727272) internal successors, (2931), 22 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:06,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:06,851 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:06,851 INFO L175 Difference]: Start difference. First operand has 659 places, 2812 transitions, 74088 flow. Second operand 22 states and 2931 transitions. [2023-08-31 00:48:06,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 3035 transitions, 87451 flow [2023-08-31 00:49:01,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 3035 transitions, 81618 flow, removed 2519 selfloop flow, removed 38 redundant places. [2023-08-31 00:49:01,294 INFO L231 Difference]: Finished difference. Result has 645 places, 2887 transitions, 73851 flow [2023-08-31 00:49:01,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=68983, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=73851, PETRI_PLACES=645, PETRI_TRANSITIONS=2887} [2023-08-31 00:49:01,295 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-08-31 00:49:01,296 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 2887 transitions, 73851 flow [2023-08-31 00:49:01,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 128.2608695652174) internal successors, (2950), 23 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:01,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:49:01,296 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:49:01,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-31 00:49:01,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:49:01,497 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:49:01,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:49:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1673633428, now seen corresponding path program 31 times [2023-08-31 00:49:01,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:49:01,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305561214] [2023-08-31 00:49:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:49:01,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:49:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:49:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:49:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:49:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305561214] [2023-08-31 00:49:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305561214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:49:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63787676] [2023-08-31 00:49:02,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 00:49:02,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:49:02,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:49:02,053 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:49:02,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-31 00:49:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:49:02,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-31 00:49:02,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:49:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:49:02,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:49:02,754 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 00:49:02,754 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 47 treesize of output 80 [2023-08-31 00:49:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:49:03,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63787676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:49:03,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:49:03,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2023-08-31 00:49:03,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125047425] [2023-08-31 00:49:03,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:49:03,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-31 00:49:03,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:49:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-31 00:49:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2023-08-31 00:49:06,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-31 00:49:06,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 2887 transitions, 73851 flow. Second operand has 44 states, 44 states have (on average 113.61363636363636) internal successors, (4999), 44 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:06,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:49:06,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-31 00:49:06,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:49:26,391 INFO L130 PetriNetUnfolder]: 12773/23696 cut-off events. [2023-08-31 00:49:26,391 INFO L131 PetriNetUnfolder]: For 5812268/5812268 co-relation queries the response was YES. [2023-08-31 00:49:26,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401408 conditions, 23696 events. 12773/23696 cut-off events. For 5812268/5812268 co-relation queries the response was YES. Maximal size of possible extension queue 1429. Compared 212571 event pairs, 2776 based on Foata normal form. 12/23708 useless extension candidates. Maximal degree in co-relation 401165. Up to 22681 conditions per place. [2023-08-31 00:49:26,904 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 2609 selfloop transitions, 286 changer transitions 7/2902 dead transitions. [2023-08-31 00:49:26,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 2902 transitions, 79659 flow [2023-08-31 00:49:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 00:49:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 00:49:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2090 transitions. [2023-08-31 00:49:26,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35836762688614543 [2023-08-31 00:49:26,906 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2090 transitions. [2023-08-31 00:49:26,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2090 transitions. [2023-08-31 00:49:26,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:49:26,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2090 transitions. [2023-08-31 00:49:26,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 116.11111111111111) internal successors, (2090), 18 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:26,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:26,910 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:26,910 INFO L175 Difference]: Start difference. First operand has 645 places, 2887 transitions, 73851 flow. Second operand 18 states and 2090 transitions. [2023-08-31 00:49:26,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 2902 transitions, 79659 flow [2023-08-31 00:50:09,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 2902 transitions, 77857 flow, removed 215 selfloop flow, removed 13 redundant places. [2023-08-31 00:50:10,024 INFO L231 Difference]: Finished difference. Result has 650 places, 2878 transitions, 72356 flow [2023-08-31 00:50:10,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=71719, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=72356, PETRI_PLACES=650, PETRI_TRANSITIONS=2878} [2023-08-31 00:50:10,026 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 629 predicate places. [2023-08-31 00:50:10,026 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 2878 transitions, 72356 flow [2023-08-31 00:50:10,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 113.61363636363636) internal successors, (4999), 44 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:10,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:50:10,027 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:50:10,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-31 00:50:10,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:50:10,228 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:50:10,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:50:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1011529933, now seen corresponding path program 18 times [2023-08-31 00:50:10,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:50:10,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756294101] [2023-08-31 00:50:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:50:10,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:50:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:50:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 00:50:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:50:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756294101] [2023-08-31 00:50:10,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756294101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:50:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249187417] [2023-08-31 00:50:10,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 00:50:10,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:50:10,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:50:10,592 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:50:10,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-31 00:50:11,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-31 00:50:11,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:50:11,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 00:50:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:50:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:50:11,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:50:11,322 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-31 00:50:11,322 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 42 treesize of output 60 [2023-08-31 00:50:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-31 00:50:11,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249187417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:50:11,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:50:11,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 24 [2023-08-31 00:50:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133501961] [2023-08-31 00:50:11,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:50:11,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 00:50:11,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:50:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 00:50:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-08-31 00:50:12,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-31 00:50:12,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 2878 transitions, 72356 flow. Second operand has 25 states, 25 states have (on average 128.12) internal successors, (3203), 25 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:12,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:50:12,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-31 00:50:12,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:50:35,505 INFO L130 PetriNetUnfolder]: 13603/25222 cut-off events. [2023-08-31 00:50:35,506 INFO L131 PetriNetUnfolder]: For 6703557/6703557 co-relation queries the response was YES. [2023-08-31 00:50:35,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434989 conditions, 25222 events. 13603/25222 cut-off events. For 6703557/6703557 co-relation queries the response was YES. Maximal size of possible extension queue 1544. Compared 228813 event pairs, 1899 based on Foata normal form. 228/25450 useless extension candidates. Maximal degree in co-relation 434745. Up to 18155 conditions per place. [2023-08-31 00:50:36,238 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 2345 selfloop transitions, 831 changer transitions 8/3184 dead transitions. [2023-08-31 00:50:36,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 3184 transitions, 88160 flow [2023-08-31 00:50:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 00:50:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 00:50:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4091 transitions. [2023-08-31 00:50:36,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40730784547988846 [2023-08-31 00:50:36,241 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4091 transitions. [2023-08-31 00:50:36,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4091 transitions. [2023-08-31 00:50:36,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:50:36,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4091 transitions. [2023-08-31 00:50:36,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 131.96774193548387) internal successors, (4091), 31 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:36,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:36,249 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:36,249 INFO L175 Difference]: Start difference. First operand has 650 places, 2878 transitions, 72356 flow. Second operand 31 states and 4091 transitions. [2023-08-31 00:50:36,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 3184 transitions, 88160 flow Killed by 15