/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:12:30,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:12:30,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:12:30,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:12:30,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:12:30,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:12:30,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:12:30,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:12:30,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:12:30,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:12:30,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:12:30,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:12:30,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:12:30,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:12:30,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:12:30,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:12:30,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:12:30,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:12:30,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:12:30,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:12:30,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:12:30,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:12:30,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:12:30,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:12:30,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:12:30,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:12:30,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:12:30,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:12:30,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:12:30,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:12:30,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:12:30,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:12:30,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:12:30,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:12:30,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:12:30,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:12:30,856 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-VariableLbe.epf [2023-01-27 21:12:30,877 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:12:30,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:12:30,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:12:30,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:12:30,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:12:30,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:12:30,879 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:12:30,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:12:30,879 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:12:30,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:12:30,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:12:30,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:12:30,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:12:30,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:12:30,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:12:30,882 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:12:31,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:12:31,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:12:31,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:12:31,087 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:12:31,088 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:12:31,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-01-27 21:12:31,987 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:12:32,205 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:12:32,205 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-01-27 21:12:32,211 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9937d7d32/cdaacb5db59e4987a2913996f1405841/FLAG9bdab20c6 [2023-01-27 21:12:32,220 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9937d7d32/cdaacb5db59e4987a2913996f1405841 [2023-01-27 21:12:32,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:12:32,223 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:12:32,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:12:32,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:12:32,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:12:32,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7252636e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32, skipping insertion in model container [2023-01-27 21:12:32,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:12:32,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:12:32,357 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-01-27 21:12:32,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:12:32,370 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:12:32,389 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-01-27 21:12:32,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:12:32,397 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:12:32,397 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:12:32,406 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:12:32,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32 WrapperNode [2023-01-27 21:12:32,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:12:32,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:12:32,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:12:32,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:12:32,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,441 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 330 [2023-01-27 21:12:32,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:12:32,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:12:32,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:12:32,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:12:32,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,470 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:12:32,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:12:32,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:12:32,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:12:32,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (1/1) ... [2023-01-27 21:12:32,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:12:32,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:12:32,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 21:12:32,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 21:12:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:12:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:12:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:12:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:12:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:12:32,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:12:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:12:32,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:12:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 21:12:32,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 21:12:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-27 21:12:32,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-27 21:12:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:12:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:12:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:12:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:12:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:12:32,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:12:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:12:32,532 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:12:32,607 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:12:32,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:12:32,925 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:12:33,069 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:12:33,069 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-27 21:12:33,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:12:33 BoogieIcfgContainer [2023-01-27 21:12:33,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:12:33,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:12:33,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:12:33,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:12:33,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:12:32" (1/3) ... [2023-01-27 21:12:33,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a1af8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:12:33, skipping insertion in model container [2023-01-27 21:12:33,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:12:32" (2/3) ... [2023-01-27 21:12:33,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a1af8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:12:33, skipping insertion in model container [2023-01-27 21:12:33,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:12:33" (3/3) ... [2023-01-27 21:12:33,081 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-01-27 21:12:33,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:12:33,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:12:33,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:12:33,190 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 21:12:33,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 239 transitions, 510 flow [2023-01-27 21:12:33,310 INFO L130 PetriNetUnfolder]: 19/235 cut-off events. [2023-01-27 21:12:33,310 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:12:33,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 235 events. 19/235 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 119 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2023-01-27 21:12:33,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 239 transitions, 510 flow [2023-01-27 21:12:33,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 223 transitions, 470 flow [2023-01-27 21:12:33,328 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:12:33,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 223 transitions, 470 flow [2023-01-27 21:12:33,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 223 transitions, 470 flow [2023-01-27 21:12:33,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 223 transitions, 470 flow [2023-01-27 21:12:33,377 INFO L130 PetriNetUnfolder]: 19/223 cut-off events. [2023-01-27 21:12:33,377 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:12:33,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 223 events. 19/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2023-01-27 21:12:33,381 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-01-27 21:12:40,814 INFO L134 LiptonReduction]: Checked pairs total: 4193 [2023-01-27 21:12:40,815 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-01-27 21:12:40,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:12:40,830 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;@1079eed4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:12:40,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 21:12:40,837 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2023-01-27 21:12:40,838 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:12:40,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:12:40,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:12:40,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:12:40,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:12:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash -13559017, now seen corresponding path program 1 times [2023-01-27 21:12:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:12:40,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28580384] [2023-01-27 21:12:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:12:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:12:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:12:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:12:41,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:12:41,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28580384] [2023-01-27 21:12:41,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28580384] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:12:41,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:12:41,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:12:41,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210794056] [2023-01-27 21:12:41,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:12:41,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:12:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:12:41,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:12:41,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:12:41,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 458 [2023-01-27 21:12:41,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:41,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:12:41,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 458 [2023-01-27 21:12:41,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:12:42,069 INFO L130 PetriNetUnfolder]: 4420/5831 cut-off events. [2023-01-27 21:12:42,069 INFO L131 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2023-01-27 21:12:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12001 conditions, 5831 events. 4420/5831 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26172 event pairs, 662 based on Foata normal form. 0/4280 useless extension candidates. Maximal degree in co-relation 10527. Up to 2391 conditions per place. [2023-01-27 21:12:42,096 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 74 selfloop transitions, 6 changer transitions 9/92 dead transitions. [2023-01-27 21:12:42,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 92 transitions, 419 flow [2023-01-27 21:12:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:12:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:12:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1297 transitions. [2023-01-27 21:12:42,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719796215429403 [2023-01-27 21:12:42,109 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1297 transitions. [2023-01-27 21:12:42,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1297 transitions. [2023-01-27 21:12:42,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:12:42,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1297 transitions. [2023-01-27 21:12:42,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 216.16666666666666) internal successors, (1297), 6 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,123 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,124 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 6 states and 1297 transitions. [2023-01-27 21:12:42,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 92 transitions, 419 flow [2023-01-27 21:12:42,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 92 transitions, 381 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-27 21:12:42,134 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 121 flow [2023-01-27 21:12:42,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-01-27 21:12:42,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-01-27 21:12:42,138 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 121 flow [2023-01-27 21:12:42,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:12:42,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:12:42,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:12:42,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:12:42,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:12:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1943026217, now seen corresponding path program 1 times [2023-01-27 21:12:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:12:42,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063832133] [2023-01-27 21:12:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:12:42,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:12:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:12:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:12:42,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:12:42,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063832133] [2023-01-27 21:12:42,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063832133] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:12:42,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:12:42,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:12:42,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079076350] [2023-01-27 21:12:42,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:12:42,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:12:42,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:12:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:12:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:12:42,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 458 [2023-01-27 21:12:42,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:12:42,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 458 [2023-01-27 21:12:42,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:12:42,599 INFO L130 PetriNetUnfolder]: 3465/4770 cut-off events. [2023-01-27 21:12:42,599 INFO L131 PetriNetUnfolder]: For 1569/1795 co-relation queries the response was YES. [2023-01-27 21:12:42,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 4770 events. 3465/4770 cut-off events. For 1569/1795 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23731 event pairs, 2333 based on Foata normal form. 312/3898 useless extension candidates. Maximal degree in co-relation 6367. Up to 4194 conditions per place. [2023-01-27 21:12:42,623 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 32 selfloop transitions, 2 changer transitions 21/63 dead transitions. [2023-01-27 21:12:42,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 284 flow [2023-01-27 21:12:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:12:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:12:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-01-27 21:12:42,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361353711790393 [2023-01-27 21:12:42,626 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-01-27 21:12:42,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-01-27 21:12:42,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:12:42,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-01-27 21:12:42,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,630 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 121 flow. Second operand 4 states and 799 transitions. [2023-01-27 21:12:42,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 284 flow [2023-01-27 21:12:42,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 21:12:42,633 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2023-01-27 21:12:42,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-01-27 21:12:42,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-01-27 21:12:42,634 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2023-01-27 21:12:42,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:12:42,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:12:42,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:12:42,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:12:42,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:12:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1032841996, now seen corresponding path program 1 times [2023-01-27 21:12:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:12:42,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967434288] [2023-01-27 21:12:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:12:42,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:12:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:12:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:12:42,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:12:42,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967434288] [2023-01-27 21:12:42,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967434288] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:12:42,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:12:42,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:12:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613009464] [2023-01-27 21:12:42,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:12:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:12:42,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:12:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:12:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:12:42,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 458 [2023-01-27 21:12:42,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 207.4) internal successors, (1037), 5 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:42,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:12:42,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 458 [2023-01-27 21:12:42,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:12:43,702 INFO L130 PetriNetUnfolder]: 8577/11322 cut-off events. [2023-01-27 21:12:43,703 INFO L131 PetriNetUnfolder]: For 4049/4049 co-relation queries the response was YES. [2023-01-27 21:12:43,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27965 conditions, 11322 events. 8577/11322 cut-off events. For 4049/4049 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 58378 event pairs, 1867 based on Foata normal form. 126/9403 useless extension candidates. Maximal degree in co-relation 27950. Up to 4329 conditions per place. [2023-01-27 21:12:43,755 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 93 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2023-01-27 21:12:43,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 539 flow [2023-01-27 21:12:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:12:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:12:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1306 transitions. [2023-01-27 21:12:43,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475254730713246 [2023-01-27 21:12:43,758 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1306 transitions. [2023-01-27 21:12:43,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1306 transitions. [2023-01-27 21:12:43,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:12:43,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1306 transitions. [2023-01-27 21:12:43,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.66666666666666) internal successors, (1306), 6 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:43,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:43,765 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:43,765 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 6 states and 1306 transitions. [2023-01-27 21:12:43,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 539 flow [2023-01-27 21:12:43,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 535 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 21:12:43,768 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 227 flow [2023-01-27 21:12:43,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=227, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-01-27 21:12:43,768 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-01-27 21:12:43,769 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 227 flow [2023-01-27 21:12:43,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.4) internal successors, (1037), 5 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:43,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:12:43,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:12:43,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:12:43,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:12:43,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:12:43,770 INFO L85 PathProgramCache]: Analyzing trace with hash -88060108, now seen corresponding path program 1 times [2023-01-27 21:12:43,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:12:43,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200769418] [2023-01-27 21:12:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:12:43,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:12:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:12:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:12:44,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:12:44,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200769418] [2023-01-27 21:12:44,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200769418] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:12:44,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873999833] [2023-01-27 21:12:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:12:44,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:12:44,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:12:44,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:12:44,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:12:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:12:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 21:12:44,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:12:44,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 21:12:44,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:12:44,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:12:44,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:12:44,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-01-27 21:12:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:12:45,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:12:45,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:12:45,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2023-01-27 21:12:45,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 287 [2023-01-27 21:12:45,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 263 [2023-01-27 21:12:45,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 215 [2023-01-27 21:12:45,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 101 [2023-01-27 21:12:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:12:45,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873999833] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:12:45,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:12:45,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 26 [2023-01-27 21:12:45,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533544356] [2023-01-27 21:12:45,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:12:45,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 21:12:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:12:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 21:12:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=609, Unknown=5, NotChecked=0, Total=756 [2023-01-27 21:12:45,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 458 [2023-01-27 21:12:45,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 227 flow. Second operand has 28 states, 28 states have (on average 132.71428571428572) internal successors, (3716), 28 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:12:45,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:12:45,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 458 [2023-01-27 21:12:45,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:12:48,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:12:50,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:13:06,015 INFO L130 PetriNetUnfolder]: 84742/112047 cut-off events. [2023-01-27 21:13:06,015 INFO L131 PetriNetUnfolder]: For 158294/158294 co-relation queries the response was YES. [2023-01-27 21:13:06,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332910 conditions, 112047 events. 84742/112047 cut-off events. For 158294/158294 co-relation queries the response was YES. Maximal size of possible extension queue 3472. Compared 665591 event pairs, 3928 based on Foata normal form. 122/98717 useless extension candidates. Maximal degree in co-relation 262697. Up to 16590 conditions per place. [2023-01-27 21:13:06,544 INFO L137 encePairwiseOnDemand]: 440/458 looper letters, 921 selfloop transitions, 245 changer transitions 97/1263 dead transitions. [2023-01-27 21:13:06,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 1263 transitions, 7819 flow [2023-01-27 21:13:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-27 21:13:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-27 21:13:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 9493 transitions. [2023-01-27 21:13:06,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31887806516627476 [2023-01-27 21:13:06,563 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 9493 transitions. [2023-01-27 21:13:06,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 9493 transitions. [2023-01-27 21:13:06,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:13:06,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 9493 transitions. [2023-01-27 21:13:06,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 146.04615384615386) internal successors, (9493), 65 states have internal predecessors, (9493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:06,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 458.0) internal successors, (30228), 66 states have internal predecessors, (30228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:06,619 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 458.0) internal successors, (30228), 66 states have internal predecessors, (30228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:06,619 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 227 flow. Second operand 65 states and 9493 transitions. [2023-01-27 21:13:06,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 1263 transitions, 7819 flow [2023-01-27 21:13:06,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 1263 transitions, 7664 flow, removed 75 selfloop flow, removed 1 redundant places. [2023-01-27 21:13:06,786 INFO L231 Difference]: Finished difference. Result has 160 places, 352 transitions, 2933 flow [2023-01-27 21:13:06,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=2933, PETRI_PLACES=160, PETRI_TRANSITIONS=352} [2023-01-27 21:13:06,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2023-01-27 21:13:06,788 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 352 transitions, 2933 flow [2023-01-27 21:13:06,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 132.71428571428572) internal successors, (3716), 28 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:06,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:13:06,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:13:06,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 21:13:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:13:06,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:13:06,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:13:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1387397044, now seen corresponding path program 2 times [2023-01-27 21:13:06,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:13:06,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864870988] [2023-01-27 21:13:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:13:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:13:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:13:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:13:07,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:13:07,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864870988] [2023-01-27 21:13:07,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864870988] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:13:07,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516123820] [2023-01-27 21:13:07,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:13:07,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:13:07,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:13:07,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:13:07,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:13:07,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:13:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:13:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-27 21:13:07,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:13:07,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:13:07,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:13:08,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:13:08,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:13:08,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:13:08,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 21:13:08,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-01-27 21:13:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:13:08,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:13:08,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:13:08,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-01-27 21:13:08,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2837 treesize of output 2765 [2023-01-27 21:13:08,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 216 [2023-01-27 21:13:08,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 233 [2023-01-27 21:13:08,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 209 [2023-01-27 21:13:09,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 114 [2023-01-27 21:13:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:13:09,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516123820] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:13:09,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:13:09,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-01-27 21:13:09,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88606771] [2023-01-27 21:13:09,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:13:09,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:13:09,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:13:09,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:13:09,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=502, Unknown=11, NotChecked=0, Total=600 [2023-01-27 21:13:09,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 458 [2023-01-27 21:13:09,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 352 transitions, 2933 flow. Second operand has 25 states, 25 states have (on average 148.0) internal successors, (3700), 25 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:09,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:13:09,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 458 [2023-01-27 21:13:09,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:13:11,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:13:27,000 INFO L130 PetriNetUnfolder]: 89637/117920 cut-off events. [2023-01-27 21:13:27,000 INFO L131 PetriNetUnfolder]: For 1399113/1402865 co-relation queries the response was YES. [2023-01-27 21:13:28,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588702 conditions, 117920 events. 89637/117920 cut-off events. For 1399113/1402865 co-relation queries the response was YES. Maximal size of possible extension queue 4996. Compared 745134 event pairs, 13404 based on Foata normal form. 1844/116980 useless extension candidates. Maximal degree in co-relation 588563. Up to 62258 conditions per place. [2023-01-27 21:13:28,524 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 370 selfloop transitions, 98 changer transitions 27/526 dead transitions. [2023-01-27 21:13:28,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 526 transitions, 5173 flow [2023-01-27 21:13:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:13:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:13:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2641 transitions. [2023-01-27 21:13:28,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391985615206781 [2023-01-27 21:13:28,531 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2641 transitions. [2023-01-27 21:13:28,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2641 transitions. [2023-01-27 21:13:28,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:13:28,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2641 transitions. [2023-01-27 21:13:28,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 155.35294117647058) internal successors, (2641), 17 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:28,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 458.0) internal successors, (8244), 18 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:28,546 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 458.0) internal successors, (8244), 18 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:28,546 INFO L175 Difference]: Start difference. First operand has 160 places, 352 transitions, 2933 flow. Second operand 17 states and 2641 transitions. [2023-01-27 21:13:28,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 526 transitions, 5173 flow [2023-01-27 21:13:51,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 526 transitions, 4767 flow, removed 202 selfloop flow, removed 3 redundant places. [2023-01-27 21:13:51,884 INFO L231 Difference]: Finished difference. Result has 175 places, 362 transitions, 2964 flow [2023-01-27 21:13:51,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2964, PETRI_PLACES=175, PETRI_TRANSITIONS=362} [2023-01-27 21:13:51,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2023-01-27 21:13:51,884 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 362 transitions, 2964 flow [2023-01-27 21:13:51,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 148.0) internal successors, (3700), 25 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:51,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:13:51,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:13:51,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 21:13:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:13:52,091 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:13:52,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:13:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1080676777, now seen corresponding path program 3 times [2023-01-27 21:13:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:13:52,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647877347] [2023-01-27 21:13:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:13:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:13:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:13:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:13:53,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:13:53,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647877347] [2023-01-27 21:13:53,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647877347] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:13:53,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966448017] [2023-01-27 21:13:53,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:13:53,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:13:53,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:13:53,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:13:53,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:13:53,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:13:53,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:13:53,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 21:13:53,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:13:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:13:53,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 21:13:53,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-01-27 21:13:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:13:53,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:13:53,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:13:53,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-27 21:13:53,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-01-27 21:13:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:13:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966448017] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:13:53,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:13:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-01-27 21:13:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557946310] [2023-01-27 21:13:53,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:13:53,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 21:13:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:13:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 21:13:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=357, Unknown=3, NotChecked=0, Total=420 [2023-01-27 21:13:53,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 458 [2023-01-27 21:13:53,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 362 transitions, 2964 flow. Second operand has 21 states, 21 states have (on average 150.9047619047619) internal successors, (3169), 21 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:13:53,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:13:53,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 458 [2023-01-27 21:13:53,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:14:15,744 INFO L130 PetriNetUnfolder]: 123887/163661 cut-off events. [2023-01-27 21:14:15,744 INFO L131 PetriNetUnfolder]: For 1902536/1907406 co-relation queries the response was YES. [2023-01-27 21:14:17,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823511 conditions, 163661 events. 123887/163661 cut-off events. For 1902536/1907406 co-relation queries the response was YES. Maximal size of possible extension queue 7042. Compared 1082608 event pairs, 17385 based on Foata normal form. 2229/161995 useless extension candidates. Maximal degree in co-relation 823365. Up to 98041 conditions per place. [2023-01-27 21:14:17,760 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 475 selfloop transitions, 185 changer transitions 14/705 dead transitions. [2023-01-27 21:14:17,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 705 transitions, 6897 flow [2023-01-27 21:14:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:14:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:14:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2254 transitions. [2023-01-27 21:14:17,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35152838427947597 [2023-01-27 21:14:17,764 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2254 transitions. [2023-01-27 21:14:17,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2254 transitions. [2023-01-27 21:14:17,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:14:17,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2254 transitions. [2023-01-27 21:14:17,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.0) internal successors, (2254), 14 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:14:17,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:14:17,772 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:14:17,773 INFO L175 Difference]: Start difference. First operand has 175 places, 362 transitions, 2964 flow. Second operand 14 states and 2254 transitions. [2023-01-27 21:14:17,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 705 transitions, 6897 flow [2023-01-27 21:15:10,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 705 transitions, 6727 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-01-27 21:15:10,021 INFO L231 Difference]: Finished difference. Result has 177 places, 470 transitions, 4450 flow [2023-01-27 21:15:10,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4450, PETRI_PLACES=177, PETRI_TRANSITIONS=470} [2023-01-27 21:15:10,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2023-01-27 21:15:10,022 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 470 transitions, 4450 flow [2023-01-27 21:15:10,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 150.9047619047619) internal successors, (3169), 21 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:10,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:10,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:10,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:10,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:10,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:15:10,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:10,224 INFO L85 PathProgramCache]: Analyzing trace with hash -112453905, now seen corresponding path program 4 times [2023-01-27 21:15:10,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:10,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130376599] [2023-01-27 21:15:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:10,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:11,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:11,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130376599] [2023-01-27 21:15:11,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130376599] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:11,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108318127] [2023-01-27 21:15:11,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:15:11,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:11,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:11,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:11,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:15:11,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:15:11,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 21:15:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:11,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:15:11,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-27 21:15:11,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:15:11,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-27 21:15:11,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-01-27 21:15:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:11,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:16,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:16,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 79 [2023-01-27 21:15:16,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-01-27 21:15:16,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-01-27 21:15:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:16,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108318127] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:16,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:16,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-27 21:15:16,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620053576] [2023-01-27 21:15:16,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:16,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 21:15:16,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:16,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 21:15:16,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=602, Unknown=3, NotChecked=0, Total=702 [2023-01-27 21:15:16,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 458 [2023-01-27 21:15:16,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 470 transitions, 4450 flow. Second operand has 27 states, 27 states have (on average 147.88888888888889) internal successors, (3993), 27 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:16,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:16,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 458 [2023-01-27 21:15:16,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:31,519 WARN L222 SmtUtils]: Spent 14.18s on a formula simplification. DAG size of input: 39 DAG size of output: 34 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)