/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 22:22:11,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 22:22:11,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 22:22:11,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 22:22:11,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 22:22:11,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 22:22:11,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 22:22:11,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 22:22:11,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 22:22:11,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 22:22:11,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 22:22:11,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 22:22:11,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 22:22:11,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 22:22:11,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 22:22:11,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 22:22:11,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 22:22:11,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 22:22:11,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 22:22:11,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 22:22:11,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 22:22:11,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 22:22:11,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 22:22:11,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 22:22:11,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 22:22:11,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 22:22:11,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 22:22:11,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 22:22:11,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 22:22:11,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 22:22:11,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 22:22:11,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 22:22:11,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 22:22:11,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 22:22:11,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 22:22:11,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 22:22:11,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 22:22:11,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 22:22:11,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 22:22:11,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 22:22:11,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 22:22:11,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 22:22:11,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 22:22:11,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 22:22:11,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 22:22:11,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 22:22:11,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 22:22:11,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 22:22:11,345 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 22:22:11,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 22:22:11,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 22:22:11,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 22:22:11,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 22:22:11,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 22:22:11,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 22:22:11,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 22:22:11,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 22:22:11,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 22:22:11,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 22:22:11,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 22:22:11,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 22:22:11,644 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 22:22:11,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2022-12-12 22:22:12,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 22:22:12,856 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 22:22:12,856 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2022-12-12 22:22:12,865 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd492b67/65e9a6476dbe43b29ee4de06391a54ed/FLAG4ccdd4746 [2022-12-12 22:22:12,877 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd492b67/65e9a6476dbe43b29ee4de06391a54ed [2022-12-12 22:22:12,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 22:22:12,883 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 22:22:12,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 22:22:12,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 22:22:12,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 22:22:12,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 10:22:12" (1/1) ... [2022-12-12 22:22:12,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be6d5a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:12, skipping insertion in model container [2022-12-12 22:22:12,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 10:22:12" (1/1) ... [2022-12-12 22:22:12,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 22:22:12,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 22:22:13,066 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2022-12-12 22:22:13,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 22:22:13,078 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 22:22:13,119 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2022-12-12 22:22:13,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 22:22:13,140 INFO L208 MainTranslator]: Completed translation [2022-12-12 22:22:13,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13 WrapperNode [2022-12-12 22:22:13,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 22:22:13,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 22:22:13,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 22:22:13,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 22:22:13,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,202 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 574 [2022-12-12 22:22:13,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 22:22:13,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 22:22:13,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 22:22:13,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 22:22:13,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 22:22:13,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 22:22:13,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 22:22:13,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 22:22:13,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (1/1) ... [2022-12-12 22:22:13,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 22:22:13,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:13,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 22:22:13,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 22:22:13,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 22:22:13,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 22:22:13,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 22:22:13,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 22:22:13,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 22:22:13,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 22:22:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 22:22:13,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 22:22:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 22:22:13,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 22:22:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 22:22:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 22:22:13,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 22:22:13,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 22:22:13,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 22:22:13,322 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 22:22:13,464 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 22:22:13,465 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 22:22:14,110 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 22:22:14,124 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 22:22:14,124 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-12 22:22:14,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 10:22:14 BoogieIcfgContainer [2022-12-12 22:22:14,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 22:22:14,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 22:22:14,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 22:22:14,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 22:22:14,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 10:22:12" (1/3) ... [2022-12-12 22:22:14,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5adc00db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 10:22:14, skipping insertion in model container [2022-12-12 22:22:14,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:22:13" (2/3) ... [2022-12-12 22:22:14,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5adc00db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 10:22:14, skipping insertion in model container [2022-12-12 22:22:14,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 10:22:14" (3/3) ... [2022-12-12 22:22:14,132 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2022-12-12 22:22:14,144 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 22:22:14,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 22:22:14,144 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 22:22:14,263 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 22:22:14,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 627 places, 690 transitions, 1404 flow [2022-12-12 22:22:14,540 INFO L130 PetriNetUnfolder]: 73/687 cut-off events. [2022-12-12 22:22:14,540 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 22:22:14,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 687 events. 73/687 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2360 event pairs, 0 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 507. Up to 2 conditions per place. [2022-12-12 22:22:14,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 627 places, 690 transitions, 1404 flow [2022-12-12 22:22:14,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 614 places, 677 transitions, 1372 flow [2022-12-12 22:22:14,578 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 22:22:14,596 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 614 places, 677 transitions, 1372 flow [2022-12-12 22:22:14,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 614 places, 677 transitions, 1372 flow [2022-12-12 22:22:14,734 INFO L130 PetriNetUnfolder]: 73/677 cut-off events. [2022-12-12 22:22:14,734 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 22:22:14,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 677 events. 73/677 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2359 event pairs, 0 based on Foata normal form. 0/604 useless extension candidates. Maximal degree in co-relation 507. Up to 2 conditions per place. [2022-12-12 22:22:14,812 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 614 places, 677 transitions, 1372 flow [2022-12-12 22:22:14,812 INFO L226 LiptonReduction]: Number of co-enabled transitions 153384 [2022-12-12 22:22:38,780 INFO L241 LiptonReduction]: Total number of compositions: 632 [2022-12-12 22:22:38,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 22:22:38,797 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=false, 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;@79fcfb9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 22:22:38,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 22:22:38,804 INFO L130 PetriNetUnfolder]: 13/48 cut-off events. [2022-12-12 22:22:38,805 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 22:22:38,805 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:38,805 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:38,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:38,809 INFO L85 PathProgramCache]: Analyzing trace with hash -759560692, now seen corresponding path program 1 times [2022-12-12 22:22:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:38,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777591378] [2022-12-12 22:22:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:38,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 22:22:39,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777591378] [2022-12-12 22:22:39,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777591378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:39,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:39,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 22:22:39,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157502013] [2022-12-12 22:22:39,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:39,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:22:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:39,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:22:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:22:39,218 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:39,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:39,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:39,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:39,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:39,778 INFO L130 PetriNetUnfolder]: 2776/3671 cut-off events. [2022-12-12 22:22:39,778 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-12-12 22:22:39,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 3671 events. 2776/3671 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12995 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 7072. Up to 3669 conditions per place. [2022-12-12 22:22:39,793 INFO L137 encePairwiseOnDemand]: 42/49 looper letters, 46 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2022-12-12 22:22:39,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 226 flow [2022-12-12 22:22:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:22:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:22:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-12-12 22:22:39,803 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2022-12-12 22:22:39,806 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2022-12-12 22:22:39,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 52 transitions, 226 flow [2022-12-12 22:22:39,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 52 transitions, 226 flow [2022-12-12 22:22:39,819 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 52 transitions, 226 flow [2022-12-12 22:22:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:39,820 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:39,820 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:39,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 22:22:39,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:39,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1800656135, now seen corresponding path program 1 times [2022-12-12 22:22:39,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:39,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337893184] [2022-12-12 22:22:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:39,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 22:22:39,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:39,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337893184] [2022-12-12 22:22:39,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337893184] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:39,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196315396] [2022-12-12 22:22:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:39,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:39,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:40,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 22:22:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:40,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-12 22:22:40,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 22:22:40,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 22:22:40,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196315396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:40,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:40,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-12 22:22:40,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622304771] [2022-12-12 22:22:40,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:40,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 22:22:40,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 22:22:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-12 22:22:40,237 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:40,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:40,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:40,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:40,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:40,808 INFO L130 PetriNetUnfolder]: 2776/3680 cut-off events. [2022-12-12 22:22:40,809 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-12-12 22:22:40,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11302 conditions, 3680 events. 2776/3680 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13053 event pairs, 1657 based on Foata normal form. 0/2561 useless extension candidates. Maximal degree in co-relation 10498. Up to 3678 conditions per place. [2022-12-12 22:22:40,825 INFO L137 encePairwiseOnDemand]: 42/49 looper letters, 46 selfloop transitions, 15 changer transitions 0/61 dead transitions. [2022-12-12 22:22:40,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 384 flow [2022-12-12 22:22:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 22:22:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 22:22:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2022-12-12 22:22:40,827 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23809523809523808 [2022-12-12 22:22:40,828 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2022-12-12 22:22:40,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 61 transitions, 384 flow [2022-12-12 22:22:40,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 61 transitions, 384 flow [2022-12-12 22:22:40,840 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 61 transitions, 384 flow [2022-12-12 22:22:40,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:40,840 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:40,840 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:40,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 22:22:41,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:41,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash -572286552, now seen corresponding path program 2 times [2022-12-12 22:22:41,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:41,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615136667] [2022-12-12 22:22:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:41,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:22:41,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:41,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615136667] [2022-12-12 22:22:41,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615136667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:41,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517836239] [2022-12-12 22:22:41,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:22:41,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:41,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:41,226 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:41,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 22:22:41,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 22:22:41,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:41,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 22:22:41,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:42,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 22:22:42,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517836239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:42,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 22:22:42,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-12 22:22:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271259646] [2022-12-12 22:22:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 22:22:42,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 22:22:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 22:22:42,317 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:42,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 384 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:42,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:42,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:42,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:43,319 INFO L130 PetriNetUnfolder]: 3116/4199 cut-off events. [2022-12-12 22:22:43,319 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2022-12-12 22:22:43,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17127 conditions, 4199 events. 3116/4199 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16254 event pairs, 1657 based on Foata normal form. 1/2929 useless extension candidates. Maximal degree in co-relation 14948. Up to 4197 conditions per place. [2022-12-12 22:22:43,342 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 99 selfloop transitions, 2 changer transitions 7/108 dead transitions. [2022-12-12 22:22:43,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 108 transitions, 918 flow [2022-12-12 22:22:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 22:22:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 22:22:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2022-12-12 22:22:43,343 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39591836734693875 [2022-12-12 22:22:43,344 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2022-12-12 22:22:43,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 108 transitions, 918 flow [2022-12-12 22:22:43,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 101 transitions, 853 flow [2022-12-12 22:22:43,362 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 101 transitions, 853 flow [2022-12-12 22:22:43,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:43,363 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:43,363 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:43,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:43,571 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,SelfDestructingSolverStorable2 [2022-12-12 22:22:43,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1438852220, now seen corresponding path program 3 times [2022-12-12 22:22:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142863209] [2022-12-12 22:22:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:43,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:22:43,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142863209] [2022-12-12 22:22:43,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142863209] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856142894] [2022-12-12 22:22:43,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:22:43,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:43,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:43,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:43,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 22:22:43,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-12 22:22:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 22:22:43,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:44,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 22:22:44,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856142894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:44,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 22:22:44,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-12-12 22:22:44,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516351638] [2022-12-12 22:22:44,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:44,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 22:22:44,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 22:22:44,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 22:22:44,705 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:44,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 101 transitions, 853 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:44,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:44,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:44,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:45,761 INFO L130 PetriNetUnfolder]: 3316/4549 cut-off events. [2022-12-12 22:22:45,761 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2022-12-12 22:22:45,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23119 conditions, 4549 events. 3316/4549 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18950 event pairs, 1657 based on Foata normal form. 1/3185 useless extension candidates. Maximal degree in co-relation 20056. Up to 4547 conditions per place. [2022-12-12 22:22:45,779 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 162 selfloop transitions, 4 changer transitions 7/173 dead transitions. [2022-12-12 22:22:45,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 173 transitions, 1826 flow [2022-12-12 22:22:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 22:22:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 22:22:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2022-12-12 22:22:45,781 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4163265306122449 [2022-12-12 22:22:45,781 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2022-12-12 22:22:45,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 173 transitions, 1826 flow [2022-12-12 22:22:45,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 166 transitions, 1747 flow [2022-12-12 22:22:45,798 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 166 transitions, 1747 flow [2022-12-12 22:22:45,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:45,798 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:45,798 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:45,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:46,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:46,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash 237219498, now seen corresponding path program 4 times [2022-12-12 22:22:46,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:46,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309254825] [2022-12-12 22:22:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:46,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:22:46,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:46,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309254825] [2022-12-12 22:22:46,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309254825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:46,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421430081] [2022-12-12 22:22:46,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:22:46,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:46,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:46,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:46,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 22:22:46,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:22:46,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 22:22:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:22:46,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:22:46,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421430081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:46,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:46,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-12 22:22:46,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82112674] [2022-12-12 22:22:46,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:46,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 22:22:46,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 22:22:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-12-12 22:22:46,560 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:46,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 166 transitions, 1747 flow. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:46,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:46,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:46,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:47,296 INFO L130 PetriNetUnfolder]: 3315/4544 cut-off events. [2022-12-12 22:22:47,297 INFO L131 PetriNetUnfolder]: For 269/269 co-relation queries the response was YES. [2022-12-12 22:22:47,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27636 conditions, 4544 events. 3315/4544 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18850 event pairs, 1657 based on Foata normal form. 0/3181 useless extension candidates. Maximal degree in co-relation 23996. Up to 4542 conditions per place. [2022-12-12 22:22:47,314 INFO L137 encePairwiseOnDemand]: 42/49 looper letters, 151 selfloop transitions, 18 changer transitions 0/169 dead transitions. [2022-12-12 22:22:47,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 169 transitions, 2115 flow [2022-12-12 22:22:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 22:22:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 22:22:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2022-12-12 22:22:47,316 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.19533527696793002 [2022-12-12 22:22:47,316 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2022-12-12 22:22:47,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 169 transitions, 2115 flow [2022-12-12 22:22:47,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 169 transitions, 2115 flow [2022-12-12 22:22:47,331 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 169 transitions, 2115 flow [2022-12-12 22:22:47,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:47,332 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:47,332 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:47,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:47,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:47,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash -251341777, now seen corresponding path program 5 times [2022-12-12 22:22:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:47,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414754545] [2022-12-12 22:22:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:22:48,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414754545] [2022-12-12 22:22:48,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414754545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:48,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:48,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:22:48,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929339474] [2022-12-12 22:22:48,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:48,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 22:22:48,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 22:22:48,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 22:22:48,153 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:48,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 169 transitions, 2115 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:48,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:48,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:48,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:50,170 INFO L130 PetriNetUnfolder]: 9117/12465 cut-off events. [2022-12-12 22:22:50,174 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-12-12 22:22:50,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88022 conditions, 12465 events. 9117/12465 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 63470 event pairs, 748 based on Foata normal form. 1/8717 useless extension candidates. Maximal degree in co-relation 85821. Up to 12463 conditions per place. [2022-12-12 22:22:50,230 INFO L137 encePairwiseOnDemand]: 36/49 looper letters, 379 selfloop transitions, 74 changer transitions 1/454 dead transitions. [2022-12-12 22:22:50,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 454 transitions, 6566 flow [2022-12-12 22:22:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 22:22:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 22:22:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2022-12-12 22:22:50,232 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2022-12-12 22:22:50,232 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2022-12-12 22:22:50,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 454 transitions, 6566 flow [2022-12-12 22:22:50,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 453 transitions, 6549 flow [2022-12-12 22:22:50,284 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 453 transitions, 6549 flow [2022-12-12 22:22:50,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:50,285 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:50,285 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:50,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 22:22:50,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:50,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1911207887, now seen corresponding path program 6 times [2022-12-12 22:22:50,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:50,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536363065] [2022-12-12 22:22:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:50,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:22:50,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:50,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536363065] [2022-12-12 22:22:50,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536363065] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:50,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:50,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:22:50,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065929040] [2022-12-12 22:22:50,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:50,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 22:22:50,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 22:22:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 22:22:50,851 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:50,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 453 transitions, 6549 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:50,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:50,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:50,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:53,427 INFO L130 PetriNetUnfolder]: 10826/14876 cut-off events. [2022-12-12 22:22:53,427 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-12-12 22:22:53,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119830 conditions, 14876 events. 10826/14876 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 78150 event pairs, 846 based on Foata normal form. 1/10444 useless extension candidates. Maximal degree in co-relation 117096. Up to 14874 conditions per place. [2022-12-12 22:22:53,506 INFO L137 encePairwiseOnDemand]: 36/49 looper letters, 494 selfloop transitions, 81 changer transitions 1/576 dead transitions. [2022-12-12 22:22:53,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 576 transitions, 9456 flow [2022-12-12 22:22:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 22:22:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 22:22:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2022-12-12 22:22:53,507 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6204081632653061 [2022-12-12 22:22:53,508 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2022-12-12 22:22:53,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 576 transitions, 9456 flow [2022-12-12 22:22:53,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 575 transitions, 9437 flow [2022-12-12 22:22:53,577 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 575 transitions, 9437 flow [2022-12-12 22:22:53,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:53,578 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:53,578 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:53,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 22:22:53,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1405598905, now seen corresponding path program 7 times [2022-12-12 22:22:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:53,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912973679] [2022-12-12 22:22:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:22:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:54,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912973679] [2022-12-12 22:22:54,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912973679] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:54,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:54,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:22:54,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614713787] [2022-12-12 22:22:54,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:54,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 22:22:54,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 22:22:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 22:22:54,155 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:54,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 575 transitions, 9437 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:54,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:54,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:54,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:56,881 INFO L130 PetriNetUnfolder]: 10879/14957 cut-off events. [2022-12-12 22:22:56,881 INFO L131 PetriNetUnfolder]: For 951/951 co-relation queries the response was YES. [2022-12-12 22:22:56,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135435 conditions, 14957 events. 10879/14957 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 78750 event pairs, 846 based on Foata normal form. 1/10497 useless extension candidates. Maximal degree in co-relation 132391. Up to 14955 conditions per place. [2022-12-12 22:22:56,975 INFO L137 encePairwiseOnDemand]: 38/49 looper letters, 557 selfloop transitions, 30 changer transitions 7/594 dead transitions. [2022-12-12 22:22:56,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 594 transitions, 10929 flow [2022-12-12 22:22:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 22:22:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 22:22:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2022-12-12 22:22:56,982 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4775510204081633 [2022-12-12 22:22:56,982 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2022-12-12 22:22:56,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 594 transitions, 10929 flow [2022-12-12 22:22:57,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 587 transitions, 10794 flow [2022-12-12 22:22:57,056 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 587 transitions, 10794 flow [2022-12-12 22:22:57,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:57,057 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:57,057 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:57,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-12 22:22:57,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:22:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash -743982027, now seen corresponding path program 8 times [2022-12-12 22:22:57,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:57,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723599723] [2022-12-12 22:22:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:57,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:22:57,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:57,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723599723] [2022-12-12 22:22:57,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723599723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:22:57,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:22:57,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:22:57,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229679506] [2022-12-12 22:22:57,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:22:57,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 22:22:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 22:22:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 22:22:57,625 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:22:57,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 587 transitions, 10794 flow. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:57,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:57,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:22:57,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:00,420 INFO L130 PetriNetUnfolder]: 11083/15267 cut-off events. [2022-12-12 22:23:00,421 INFO L131 PetriNetUnfolder]: For 962/962 co-relation queries the response was YES. [2022-12-12 22:23:00,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153517 conditions, 15267 events. 11083/15267 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 81067 event pairs, 846 based on Foata normal form. 1/10713 useless extension candidates. Maximal degree in co-relation 149983. Up to 15265 conditions per place. [2022-12-12 22:23:00,495 INFO L137 encePairwiseOnDemand]: 38/49 looper letters, 569 selfloop transitions, 60 changer transitions 1/630 dead transitions. [2022-12-12 22:23:00,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 630 transitions, 12846 flow [2022-12-12 22:23:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 22:23:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 22:23:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2022-12-12 22:23:00,497 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2022-12-12 22:23:00,497 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 36 predicate places. [2022-12-12 22:23:00,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 630 transitions, 12846 flow [2022-12-12 22:23:00,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 629 transitions, 12823 flow [2022-12-12 22:23:00,566 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 629 transitions, 12823 flow [2022-12-12 22:23:00,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:00,566 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:00,566 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:00,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-12 22:23:00,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:23:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash -495473432, now seen corresponding path program 1 times [2022-12-12 22:23:00,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:00,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536695636] [2022-12-12 22:23:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:00,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:00,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536695636] [2022-12-12 22:23:00,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536695636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:23:00,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:23:00,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:23:00,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602096644] [2022-12-12 22:23:00,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:23:00,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:23:00,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:23:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:23:00,704 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:23:00,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 629 transitions, 12823 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:00,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:00,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:23:00,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:04,594 INFO L130 PetriNetUnfolder]: 15713/21496 cut-off events. [2022-12-12 22:23:04,595 INFO L131 PetriNetUnfolder]: For 1041/1041 co-relation queries the response was YES. [2022-12-12 22:23:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237523 conditions, 21496 events. 15713/21496 cut-off events. For 1041/1041 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 114037 event pairs, 670 based on Foata normal form. 0/15263 useless extension candidates. Maximal degree in co-relation 233428. Up to 21494 conditions per place. [2022-12-12 22:23:04,715 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 801 selfloop transitions, 39 changer transitions 0/840 dead transitions. [2022-12-12 22:23:04,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 840 transitions, 18747 flow [2022-12-12 22:23:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:23:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:23:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2022-12-12 22:23:04,716 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2022-12-12 22:23:04,716 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 38 predicate places. [2022-12-12 22:23:04,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 840 transitions, 18747 flow [2022-12-12 22:23:04,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 840 transitions, 18747 flow [2022-12-12 22:23:04,824 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 840 transitions, 18747 flow [2022-12-12 22:23:04,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:04,824 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:04,824 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:04,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-12 22:23:04,824 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:23:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash 918667252, now seen corresponding path program 1 times [2022-12-12 22:23:04,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:04,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001981600] [2022-12-12 22:23:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:04,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001981600] [2022-12-12 22:23:04,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001981600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:23:04,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:23:04,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:23:04,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063671858] [2022-12-12 22:23:04,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:23:04,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:23:04,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:23:04,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:23:04,940 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:23:04,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 840 transitions, 18747 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:04,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:04,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:23:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:12,014 INFO L130 PetriNetUnfolder]: 26438/35875 cut-off events. [2022-12-12 22:23:12,014 INFO L131 PetriNetUnfolder]: For 1717/1717 co-relation queries the response was YES. [2022-12-12 22:23:12,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432177 conditions, 35875 events. 26438/35875 cut-off events. For 1717/1717 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 196029 event pairs, 740 based on Foata normal form. 0/25770 useless extension candidates. Maximal degree in co-relation 427720. Up to 35873 conditions per place. [2022-12-12 22:23:12,258 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 1159 selfloop transitions, 47 changer transitions 0/1206 dead transitions. [2022-12-12 22:23:12,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 1206 transitions, 29265 flow [2022-12-12 22:23:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:23:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:23:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2022-12-12 22:23:12,259 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2022-12-12 22:23:12,260 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2022-12-12 22:23:12,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 1206 transitions, 29265 flow [2022-12-12 22:23:12,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 1206 transitions, 29265 flow [2022-12-12 22:23:12,471 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 1206 transitions, 29265 flow [2022-12-12 22:23:12,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:12,471 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:12,471 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-12 22:23:12,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:23:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1775316422, now seen corresponding path program 1 times [2022-12-12 22:23:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:12,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761205115] [2022-12-12 22:23:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:12,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761205115] [2022-12-12 22:23:12,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761205115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:23:12,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:23:12,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:23:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066863693] [2022-12-12 22:23:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:23:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:23:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:23:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:23:12,580 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:23:12,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 1206 transitions, 29265 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:12,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:12,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:23:12,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:21,697 INFO L130 PetriNetUnfolder]: 29273/39798 cut-off events. [2022-12-12 22:23:21,697 INFO L131 PetriNetUnfolder]: For 1828/1828 co-relation queries the response was YES. [2022-12-12 22:23:21,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519091 conditions, 39798 events. 29273/39798 cut-off events. For 1828/1828 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 220720 event pairs, 616 based on Foata normal form. 0/29321 useless extension candidates. Maximal degree in co-relation 514294. Up to 39796 conditions per place. [2022-12-12 22:23:22,021 INFO L137 encePairwiseOnDemand]: 46/49 looper letters, 1497 selfloop transitions, 56 changer transitions 18/1571 dead transitions. [2022-12-12 22:23:22,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 1571 transitions, 41242 flow [2022-12-12 22:23:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:23:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:23:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2022-12-12 22:23:22,022 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2022-12-12 22:23:22,022 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2022-12-12 22:23:22,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 1571 transitions, 41242 flow [2022-12-12 22:23:22,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 1553 transitions, 40756 flow [2022-12-12 22:23:22,430 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 1553 transitions, 40756 flow [2022-12-12 22:23:22,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:22,431 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:22,431 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-12 22:23:22,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:23:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:22,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1002260434, now seen corresponding path program 1 times [2022-12-12 22:23:22,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:22,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91388650] [2022-12-12 22:23:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:22,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:23:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:22,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91388650] [2022-12-12 22:23:22,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91388650] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:23:22,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:23:22,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:23:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407562287] [2022-12-12 22:23:22,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:23:22,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:23:22,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:23:22,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 22:23:22,648 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:23:22,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 1553 transitions, 40756 flow. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:22,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:22,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:23:22,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:34,075 INFO L130 PetriNetUnfolder]: 29958/40831 cut-off events. [2022-12-12 22:23:34,076 INFO L131 PetriNetUnfolder]: For 2177/2177 co-relation queries the response was YES. [2022-12-12 22:23:34,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573445 conditions, 40831 events. 29958/40831 cut-off events. For 2177/2177 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 228223 event pairs, 412 based on Foata normal form. 4/30112 useless extension candidates. Maximal degree in co-relation 567802. Up to 40829 conditions per place. [2022-12-12 22:23:34,348 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 1622 selfloop transitions, 21 changer transitions 175/1818 dead transitions. [2022-12-12 22:23:34,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 1818 transitions, 51363 flow [2022-12-12 22:23:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:23:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:23:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2022-12-12 22:23:34,350 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2022-12-12 22:23:34,350 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2022-12-12 22:23:34,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 1818 transitions, 51363 flow [2022-12-12 22:23:34,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 1643 transitions, 46385 flow [2022-12-12 22:23:34,623 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 1643 transitions, 46385 flow [2022-12-12 22:23:34,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:34,624 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:34,624 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:34,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-12 22:23:34,624 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:23:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1519137846, now seen corresponding path program 2 times [2022-12-12 22:23:34,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:34,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396390652] [2022-12-12 22:23:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:34,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:23:34,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:34,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396390652] [2022-12-12 22:23:34,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396390652] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:23:34,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:23:34,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:23:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87967733] [2022-12-12 22:23:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:23:34,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:23:34,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:23:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 22:23:34,843 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:23:34,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 1643 transitions, 46385 flow. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:34,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:34,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:23:34,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:46,311 INFO L130 PetriNetUnfolder]: 28936/39351 cut-off events. [2022-12-12 22:23:46,312 INFO L131 PetriNetUnfolder]: For 1866/1866 co-relation queries the response was YES. [2022-12-12 22:23:46,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591954 conditions, 39351 events. 28936/39351 cut-off events. For 1866/1866 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 217677 event pairs, 398 based on Foata normal form. 4/29086 useless extension candidates. Maximal degree in co-relation 586834. Up to 39349 conditions per place. [2022-12-12 22:23:46,584 INFO L137 encePairwiseOnDemand]: 46/49 looper letters, 1445 selfloop transitions, 8 changer transitions 186/1639 dead transitions. [2022-12-12 22:23:46,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 1639 transitions, 49551 flow [2022-12-12 22:23:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:23:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:23:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2022-12-12 22:23:46,586 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.49489795918367346 [2022-12-12 22:23:46,586 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 47 predicate places. [2022-12-12 22:23:46,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 1639 transitions, 49551 flow [2022-12-12 22:23:46,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 1453 transitions, 43875 flow [2022-12-12 22:23:46,835 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 1453 transitions, 43875 flow [2022-12-12 22:23:46,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:46,835 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:46,835 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-12 22:23:46,835 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:23:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1560156454, now seen corresponding path program 1 times [2022-12-12 22:23:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:46,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542589118] [2022-12-12 22:23:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:47,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542589118] [2022-12-12 22:23:47,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542589118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:23:47,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391174633] [2022-12-12 22:23:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:47,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:47,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:23:47,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:23:47,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 22:23:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 22:23:47,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:23:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:47,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:23:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:47,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391174633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:23:47,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:23:47,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-12 22:23:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075083774] [2022-12-12 22:23:47,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:23:47,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 22:23:47,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:47,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 22:23:47,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 22:23:47,392 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:23:47,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 1453 transitions, 43875 flow. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:47,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:47,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:23:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:58,102 INFO L130 PetriNetUnfolder]: 28117/38215 cut-off events. [2022-12-12 22:23:58,102 INFO L131 PetriNetUnfolder]: For 1522/1522 co-relation queries the response was YES. [2022-12-12 22:23:58,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613012 conditions, 38215 events. 28117/38215 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 209674 event pairs, 340 based on Foata normal form. 3/28305 useless extension candidates. Maximal degree in co-relation 608353. Up to 38213 conditions per place. [2022-12-12 22:23:58,405 INFO L137 encePairwiseOnDemand]: 45/49 looper letters, 1370 selfloop transitions, 17 changer transitions 191/1578 dead transitions. [2022-12-12 22:23:58,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 1578 transitions, 50826 flow [2022-12-12 22:23:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:23:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:23:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2022-12-12 22:23:58,406 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2022-12-12 22:23:58,406 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2022-12-12 22:23:58,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 1578 transitions, 50826 flow [2022-12-12 22:23:58,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 1387 transitions, 44669 flow [2022-12-12 22:23:58,663 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 1387 transitions, 44669 flow [2022-12-12 22:23:58,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:58,663 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:58,663 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:58,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 22:23:58,863 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,SelfDestructingSolverStorable14 [2022-12-12 22:23:58,864 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:23:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2110925509, now seen corresponding path program 1 times [2022-12-12 22:23:58,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:58,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732030073] [2022-12-12 22:23:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:58,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:59,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732030073] [2022-12-12 22:23:59,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732030073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:23:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946369644] [2022-12-12 22:23:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:59,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:59,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:23:59,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:23:59,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 22:23:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:59,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 22:23:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:23:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:59,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:23:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:23:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946369644] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:23:59,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:23:59,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 8 [2022-12-12 22:23:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575667348] [2022-12-12 22:23:59,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:23:59,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 22:23:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 22:23:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-12 22:23:59,537 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:23:59,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 1387 transitions, 44669 flow. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:59,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:59,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:23:59,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:11,293 INFO L130 PetriNetUnfolder]: 28733/39299 cut-off events. [2022-12-12 22:24:11,293 INFO L131 PetriNetUnfolder]: For 1649/1649 co-relation queries the response was YES. [2022-12-12 22:24:11,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669656 conditions, 39299 events. 28733/39299 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 218096 event pairs, 64 based on Foata normal form. 5/29463 useless extension candidates. Maximal degree in co-relation 665124. Up to 39297 conditions per place. [2022-12-12 22:24:11,704 INFO L137 encePairwiseOnDemand]: 44/49 looper letters, 1228 selfloop transitions, 24 changer transitions 426/1678 dead transitions. [2022-12-12 22:24:11,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 1678 transitions, 57394 flow [2022-12-12 22:24:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:24:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:24:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2022-12-12 22:24:11,706 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4376417233560091 [2022-12-12 22:24:11,706 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 53 predicate places. [2022-12-12 22:24:11,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 1678 transitions, 57394 flow [2022-12-12 22:24:11,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 1252 transitions, 42820 flow [2022-12-12 22:24:11,953 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 1252 transitions, 42820 flow [2022-12-12 22:24:11,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:11,953 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:24:11,953 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:24:11,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 22:24:12,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 22:24:12,155 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:24:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:24:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1061864987, now seen corresponding path program 2 times [2022-12-12 22:24:12,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:24:12,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785715821] [2022-12-12 22:24:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:12,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:24:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:24:12,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:24:12,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785715821] [2022-12-12 22:24:12,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785715821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:24:12,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:24:12,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:24:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702757969] [2022-12-12 22:24:12,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:24:12,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 22:24:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:24:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 22:24:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 22:24:12,454 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:24:12,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 1252 transitions, 42820 flow. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:12,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:24:12,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:24:12,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:22,854 INFO L130 PetriNetUnfolder]: 26795/36828 cut-off events. [2022-12-12 22:24:22,855 INFO L131 PetriNetUnfolder]: For 1390/1390 co-relation queries the response was YES. [2022-12-12 22:24:22,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664331 conditions, 36828 events. 26795/36828 cut-off events. For 1390/1390 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 204608 event pairs, 120 based on Foata normal form. 4/28269 useless extension candidates. Maximal degree in co-relation 659777. Up to 36826 conditions per place. [2022-12-12 22:24:23,310 INFO L137 encePairwiseOnDemand]: 42/49 looper letters, 1152 selfloop transitions, 24 changer transitions 326/1502 dead transitions. [2022-12-12 22:24:23,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 1502 transitions, 54360 flow [2022-12-12 22:24:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 22:24:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 22:24:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2022-12-12 22:24:23,312 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40233236151603496 [2022-12-12 22:24:23,313 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 56 predicate places. [2022-12-12 22:24:23,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 1502 transitions, 54360 flow [2022-12-12 22:24:23,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 1176 transitions, 42558 flow [2022-12-12 22:24:23,560 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 1176 transitions, 42558 flow [2022-12-12 22:24:23,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:23,560 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:24:23,560 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:24:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-12 22:24:23,561 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:24:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:24:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1128159508, now seen corresponding path program 2 times [2022-12-12 22:24:23,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:24:23,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144746782] [2022-12-12 22:24:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:23,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:24:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:24:23,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:24:23,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144746782] [2022-12-12 22:24:23,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144746782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:24:23,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:24:23,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:24:23,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38545698] [2022-12-12 22:24:23,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:24:23,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:24:23,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:24:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:24:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 22:24:23,746 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:24:23,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 1176 transitions, 42558 flow. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:23,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:24:23,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:24:23,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:33,219 INFO L130 PetriNetUnfolder]: 24555/33383 cut-off events. [2022-12-12 22:24:33,219 INFO L131 PetriNetUnfolder]: For 1214/1214 co-relation queries the response was YES. [2022-12-12 22:24:33,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635625 conditions, 33383 events. 24555/33383 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 177769 event pairs, 120 based on Foata normal form. 5/25561 useless extension candidates. Maximal degree in co-relation 631232. Up to 33384 conditions per place. [2022-12-12 22:24:33,703 INFO L137 encePairwiseOnDemand]: 46/49 looper letters, 822 selfloop transitions, 0 changer transitions 349/1171 dead transitions. [2022-12-12 22:24:33,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 1171 transitions, 44720 flow [2022-12-12 22:24:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:24:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:24:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2022-12-12 22:24:33,704 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2022-12-12 22:24:33,705 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2022-12-12 22:24:33,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 1171 transitions, 44720 flow [2022-12-12 22:24:33,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 822 transitions, 31380 flow [2022-12-12 22:24:33,959 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 822 transitions, 31380 flow [2022-12-12 22:24:33,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:33,960 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:24:33,960 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:24:33,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-12 22:24:33,960 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:24:33,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:24:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1370055505, now seen corresponding path program 1 times [2022-12-12 22:24:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:24:33,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811518646] [2022-12-12 22:24:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:33,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:24:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:24:35,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:24:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811518646] [2022-12-12 22:24:35,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811518646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:24:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969258377] [2022-12-12 22:24:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:35,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:35,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:24:35,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:24:35,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 22:24:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:35,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 22:24:35,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:24:35,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-12-12 22:24:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:24:35,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:24:36,121 INFO L321 Elim1Store]: treesize reduction 27, result has 74.3 percent of original size [2022-12-12 22:24:36,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 119 [2022-12-12 22:24:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:24:36,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969258377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:24:36,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:24:36,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2022-12-12 22:24:36,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851855789] [2022-12-12 22:24:36,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:24:36,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:24:36,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:24:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:24:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:24:36,168 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:24:36,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 822 transitions, 31380 flow. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:36,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:24:36,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:24:36,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:58,491 INFO L130 PetriNetUnfolder]: 60290/81746 cut-off events. [2022-12-12 22:24:58,491 INFO L131 PetriNetUnfolder]: For 1908/1908 co-relation queries the response was YES. [2022-12-12 22:24:58,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1637956 conditions, 81746 events. 60290/81746 cut-off events. For 1908/1908 co-relation queries the response was YES. Maximal size of possible extension queue 2000. Compared 484635 event pairs, 141 based on Foata normal form. 0/64956 useless extension candidates. Maximal degree in co-relation 1619962. Up to 81747 conditions per place. [2022-12-12 22:24:59,431 INFO L137 encePairwiseOnDemand]: 34/49 looper letters, 2780 selfloop transitions, 363 changer transitions 0/3143 dead transitions. [2022-12-12 22:24:59,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 3143 transitions, 126029 flow [2022-12-12 22:24:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:24:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:24:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2022-12-12 22:24:59,432 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2022-12-12 22:24:59,433 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2022-12-12 22:24:59,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 3143 transitions, 126029 flow [2022-12-12 22:25:00,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 3143 transitions, 126029 flow [2022-12-12 22:25:00,154 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 3143 transitions, 126029 flow [2022-12-12 22:25:00,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:25:00,154 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:25:00,154 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:25:00,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-12 22:25:00,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:00,355 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:25:00,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:25:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash -942142619, now seen corresponding path program 2 times [2022-12-12 22:25:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:25:00,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369632994] [2022-12-12 22:25:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:25:00,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:25:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:25:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:25:01,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:25:01,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369632994] [2022-12-12 22:25:01,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369632994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:25:01,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982242904] [2022-12-12 22:25:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:25:01,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:01,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:25:01,833 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:25:01,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 22:25:02,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:25:02,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:25:02,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 22:25:02,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:25:02,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:25:02,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2022-12-12 22:25:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:25:02,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:25:02,873 INFO L321 Elim1Store]: treesize reduction 33, result has 78.4 percent of original size [2022-12-12 22:25:02,873 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 88 treesize of output 173 [2022-12-12 22:25:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:25:02,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982242904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:25:02,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:25:02,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2022-12-12 22:25:02,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455205478] [2022-12-12 22:25:02,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:25:02,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 22:25:02,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:25:02,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 22:25:02,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2022-12-12 22:25:02,937 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:25:02,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 3143 transitions, 126029 flow. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:25:02,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:25:02,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:25:02,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:27:12,728 INFO L130 PetriNetUnfolder]: 158169/214657 cut-off events. [2022-12-12 22:27:12,728 INFO L131 PetriNetUnfolder]: For 7528/7528 co-relation queries the response was YES. [2022-12-12 22:27:13,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517137 conditions, 214657 events. 158169/214657 cut-off events. For 7528/7528 co-relation queries the response was YES. Maximal size of possible extension queue 5099. Compared 1424032 event pairs, 480 based on Foata normal form. 0/170437 useless extension candidates. Maximal degree in co-relation 4411083. Up to 214658 conditions per place. [2022-12-12 22:27:15,261 INFO L137 encePairwiseOnDemand]: 32/49 looper letters, 9827 selfloop transitions, 1677 changer transitions 0/11504 dead transitions. [2022-12-12 22:27:15,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 11504 transitions, 484548 flow [2022-12-12 22:27:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 22:27:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 22:27:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 671 transitions. [2022-12-12 22:27:15,264 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5071806500377929 [2022-12-12 22:27:15,264 INFO L295 CegarLoopForPetriNet]: 46 programPoint places, 76 predicate places. [2022-12-12 22:27:15,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 11504 transitions, 484548 flow [2022-12-12 22:27:17,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 11504 transitions, 484548 flow [2022-12-12 22:27:17,432 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 11504 transitions, 484548 flow [2022-12-12 22:27:17,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:17,432 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:27:17,432 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:27:17,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-12 22:27:17,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:17,635 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 22:27:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:27:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash 706510491, now seen corresponding path program 3 times [2022-12-12 22:27:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:27:17,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641757194] [2022-12-12 22:27:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:27:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:27:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:27:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 22:27:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:27:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641757194] [2022-12-12 22:27:19,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641757194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:27:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611191765] [2022-12-12 22:27:19,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:27:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:27:19,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:27:19,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 22:27:19,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 22:27:19,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:27:19,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 22:27:19,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:27:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:27:19,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:27:19,917 INFO L321 Elim1Store]: treesize reduction 27, result has 74.3 percent of original size [2022-12-12 22:27:19,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 119 [2022-12-12 22:27:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 22:27:19,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611191765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:27:19,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:27:19,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 23 [2022-12-12 22:27:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896089470] [2022-12-12 22:27:19,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:27:19,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:27:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:27:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:27:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:27:19,983 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 49 [2022-12-12 22:27:19,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 11504 transitions, 484548 flow. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:19,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:27:19,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 49 [2022-12-12 22:27:19,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand