/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -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 [2023-01-28 03:43:04,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 03:43:04,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 03:43:04,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 03:43:04,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 03:43:04,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 03:43:04,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 03:43:04,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 03:43:04,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 03:43:04,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 03:43:04,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 03:43:04,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 03:43:04,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 03:43:04,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 03:43:04,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 03:43:04,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 03:43:04,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 03:43:04,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 03:43:04,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 03:43:04,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 03:43:04,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 03:43:04,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 03:43:04,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 03:43:04,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 03:43:04,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 03:43:04,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 03:43:04,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 03:43:04,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 03:43:04,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 03:43:04,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 03:43:04,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 03:43:04,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 03:43:04,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 03:43:04,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 03:43:04,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 03:43:04,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 03:43:04,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 03:43:04,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 03:43:04,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 03:43:04,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 03:43:04,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 03:43:04,237 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 [2023-01-28 03:43:04,254 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 03:43:04,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 03:43:04,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 03:43:04,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 03:43:04,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 03:43:04,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 03:43:04,256 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 03:43:04,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 03:43:04,256 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 03:43:04,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 03:43:04,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 03:43:04,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 03:43:04,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 03:43:04,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 03:43:04,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 03:43:04,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:43:04,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 03:43:04,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 03:43:04,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 03:43:04,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 03:43:04,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 03:43:04,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 03:43:04,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 03:43:04,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 03:43:04,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 03:43:04,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 03:43:04,450 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 03:43:04,450 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 03:43:04,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-01-28 03:43:05,432 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 03:43:05,586 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 03:43:05,586 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-01-28 03:43:05,591 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ebead911/88333ba19d534c5e9b71eba1c03667c1/FLAG9f20db94d [2023-01-28 03:43:05,600 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ebead911/88333ba19d534c5e9b71eba1c03667c1 [2023-01-28 03:43:05,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 03:43:05,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 03:43:05,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 03:43:05,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 03:43:05,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 03:43:05,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4623997e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05, skipping insertion in model container [2023-01-28 03:43:05,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 03:43:05,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 03:43:05,743 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] [2023-01-28 03:43:05,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:43:05,754 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 03:43:05,771 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] [2023-01-28 03:43:05,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:43:05,778 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:43:05,779 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:43:05,783 INFO L208 MainTranslator]: Completed translation [2023-01-28 03:43:05,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05 WrapperNode [2023-01-28 03:43:05,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 03:43:05,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 03:43:05,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 03:43:05,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 03:43:05,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,818 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 330 [2023-01-28 03:43:05,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 03:43:05,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 03:43:05,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 03:43:05,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 03:43:05,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,843 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 03:43:05,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 03:43:05,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 03:43:05,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 03:43:05,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (1/1) ... [2023-01-28 03:43:05,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:43:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:43:05,879 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) [2023-01-28 03:43:05,883 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 [2023-01-28 03:43:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 03:43:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 03:43:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 03:43:05,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 03:43:05,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 03:43:05,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 03:43:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 03:43:05,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 03:43:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 03:43:05,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 03:43:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-28 03:43:05,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-28 03:43:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 03:43:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 03:43:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 03:43:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 03:43:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 03:43:05,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 03:43:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 03:43:05,914 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 03:43:06,047 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 03:43:06,048 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 03:43:06,400 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 03:43:06,538 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 03:43:06,538 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 03:43:06,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:43:06 BoogieIcfgContainer [2023-01-28 03:43:06,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 03:43:06,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 03:43:06,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 03:43:06,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 03:43:06,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 03:43:05" (1/3) ... [2023-01-28 03:43:06,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582eb433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:43:06, skipping insertion in model container [2023-01-28 03:43:06,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:43:05" (2/3) ... [2023-01-28 03:43:06,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582eb433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:43:06, skipping insertion in model container [2023-01-28 03:43:06,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:43:06" (3/3) ... [2023-01-28 03:43:06,560 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-01-28 03:43:06,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 03:43:06,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 03:43:06,575 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 03:43:06,658 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 03:43:06,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 239 transitions, 510 flow [2023-01-28 03:43:06,797 INFO L130 PetriNetUnfolder]: 19/235 cut-off events. [2023-01-28 03:43:06,797 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 03:43:06,802 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. [2023-01-28 03:43:06,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 239 transitions, 510 flow [2023-01-28 03:43:06,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 223 transitions, 470 flow [2023-01-28 03:43:06,812 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 03:43:06,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 223 transitions, 470 flow [2023-01-28 03:43:06,822 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 223 transitions, 470 flow [2023-01-28 03:43:06,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 223 transitions, 470 flow [2023-01-28 03:43:06,882 INFO L130 PetriNetUnfolder]: 19/223 cut-off events. [2023-01-28 03:43:06,882 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 03:43:06,884 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. [2023-01-28 03:43:06,886 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-01-28 03:43:13,365 INFO L134 LiptonReduction]: Checked pairs total: 4193 [2023-01-28 03:43:13,365 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-01-28 03:43:13,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 03:43:13,387 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;@58f54dea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 03:43:13,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 03:43:13,393 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2023-01-28 03:43:13,394 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 03:43:13,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:43:13,394 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] [2023-01-28 03:43:13,395 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)] === [2023-01-28 03:43:13,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:43:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash -13559017, now seen corresponding path program 1 times [2023-01-28 03:43:13,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:43:13,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325253520] [2023-01-28 03:43:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:43:13,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:43:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:43:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:43:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:43:14,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325253520] [2023-01-28 03:43:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325253520] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:43:14,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:43:14,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:43:14,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635876785] [2023-01-28 03:43:14,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:43:14,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:43:14,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:43:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:43:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 03:43:14,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 458 [2023-01-28 03:43:14,123 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) [2023-01-28 03:43:14,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:43:14,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 458 [2023-01-28 03:43:14,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:43:14,697 INFO L130 PetriNetUnfolder]: 4420/5831 cut-off events. [2023-01-28 03:43:14,697 INFO L131 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2023-01-28 03:43:14,707 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. [2023-01-28 03:43:14,731 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 74 selfloop transitions, 6 changer transitions 9/92 dead transitions. [2023-01-28 03:43:14,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 92 transitions, 419 flow [2023-01-28 03:43:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 03:43:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 03:43:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1297 transitions. [2023-01-28 03:43:14,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719796215429403 [2023-01-28 03:43:14,744 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1297 transitions. [2023-01-28 03:43:14,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1297 transitions. [2023-01-28 03:43:14,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:43:14,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1297 transitions. [2023-01-28 03:43:14,752 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) [2023-01-28 03:43:14,757 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) [2023-01-28 03:43:14,759 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) [2023-01-28 03:43:14,760 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 6 states and 1297 transitions. [2023-01-28 03:43:14,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 92 transitions, 419 flow [2023-01-28 03:43:14,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 92 transitions, 381 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-28 03:43:14,771 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 121 flow [2023-01-28 03:43:14,772 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} [2023-01-28 03:43:14,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-01-28 03:43:14,775 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 121 flow [2023-01-28 03:43:14,775 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) [2023-01-28 03:43:14,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:43:14,776 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] [2023-01-28 03:43:14,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 03:43:14,776 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)] === [2023-01-28 03:43:14,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:43:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1943026217, now seen corresponding path program 1 times [2023-01-28 03:43:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:43:14,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088006253] [2023-01-28 03:43:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:43:14,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:43:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:43:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:43:14,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:43:14,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088006253] [2023-01-28 03:43:14,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088006253] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:43:14,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:43:14,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:43:14,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610089167] [2023-01-28 03:43:14,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:43:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:43:14,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:43:14,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:43:14,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:43:14,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 458 [2023-01-28 03:43:14,873 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) [2023-01-28 03:43:14,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:43:14,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 458 [2023-01-28 03:43:14,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:43:15,263 INFO L130 PetriNetUnfolder]: 3465/4770 cut-off events. [2023-01-28 03:43:15,263 INFO L131 PetriNetUnfolder]: For 1569/1795 co-relation queries the response was YES. [2023-01-28 03:43:15,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 4770 events. 3465/4770 cut-off events. For 1569/1795 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23731 event pairs, 2333 based on Foata normal form. 312/3898 useless extension candidates. Maximal degree in co-relation 6367. Up to 4194 conditions per place. [2023-01-28 03:43:15,288 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 32 selfloop transitions, 2 changer transitions 21/63 dead transitions. [2023-01-28 03:43:15,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 284 flow [2023-01-28 03:43:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:43:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:43:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-01-28 03:43:15,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361353711790393 [2023-01-28 03:43:15,290 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-01-28 03:43:15,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-01-28 03:43:15,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:43:15,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-01-28 03:43:15,292 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) [2023-01-28 03:43:15,294 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) [2023-01-28 03:43:15,295 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) [2023-01-28 03:43:15,295 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 121 flow. Second operand 4 states and 799 transitions. [2023-01-28 03:43:15,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 284 flow [2023-01-28 03:43:15,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 03:43:15,298 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2023-01-28 03:43:15,298 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} [2023-01-28 03:43:15,298 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-01-28 03:43:15,298 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2023-01-28 03:43:15,299 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) [2023-01-28 03:43:15,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:43:15,299 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] [2023-01-28 03:43:15,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 03:43:15,299 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)] === [2023-01-28 03:43:15,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:43:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1032841996, now seen corresponding path program 1 times [2023-01-28 03:43:15,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:43:15,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610993870] [2023-01-28 03:43:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:43:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:43:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:43:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:43:15,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:43:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610993870] [2023-01-28 03:43:15,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610993870] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:43:15,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:43:15,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 03:43:15,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670878196] [2023-01-28 03:43:15,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:43:15,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:43:15,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:43:15,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:43:15,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 03:43:15,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 458 [2023-01-28 03:43:15,493 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) [2023-01-28 03:43:15,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:43:15,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 458 [2023-01-28 03:43:15,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:43:16,410 INFO L130 PetriNetUnfolder]: 8577/11322 cut-off events. [2023-01-28 03:43:16,411 INFO L131 PetriNetUnfolder]: For 4049/4049 co-relation queries the response was YES. [2023-01-28 03:43:16,428 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. [2023-01-28 03:43:16,466 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 93 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2023-01-28 03:43:16,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 539 flow [2023-01-28 03:43:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 03:43:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 03:43:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1306 transitions. [2023-01-28 03:43:16,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475254730713246 [2023-01-28 03:43:16,469 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1306 transitions. [2023-01-28 03:43:16,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1306 transitions. [2023-01-28 03:43:16,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:43:16,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1306 transitions. [2023-01-28 03:43:16,471 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) [2023-01-28 03:43:16,474 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) [2023-01-28 03:43:16,475 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) [2023-01-28 03:43:16,475 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 6 states and 1306 transitions. [2023-01-28 03:43:16,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 539 flow [2023-01-28 03:43:16,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 535 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 03:43:16,478 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 227 flow [2023-01-28 03:43:16,479 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} [2023-01-28 03:43:16,479 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-01-28 03:43:16,479 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 227 flow [2023-01-28 03:43:16,480 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) [2023-01-28 03:43:16,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:43:16,480 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] [2023-01-28 03:43:16,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 03:43:16,480 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)] === [2023-01-28 03:43:16,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:43:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -88060108, now seen corresponding path program 1 times [2023-01-28 03:43:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:43:16,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998335853] [2023-01-28 03:43:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:43:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:43:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:43:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:43:17,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:43:17,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998335853] [2023-01-28 03:43:17,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998335853] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:43:17,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348832531] [2023-01-28 03:43:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:43:17,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:43:17,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:43:17,203 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) [2023-01-28 03:43:17,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 03:43:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:43:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 03:43:17,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:43:17,398 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 [2023-01-28 03:43:17,515 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 [2023-01-28 03:43:17,580 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 [2023-01-28 03:43:17,651 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 [2023-01-28 03:43:17,851 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 [2023-01-28 03:43:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:43:17,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:43:18,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:43:18,520 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 [2023-01-28 03:43:18,533 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 [2023-01-28 03:43:18,538 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 [2023-01-28 03:43:18,559 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 [2023-01-28 03:43:18,567 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 [2023-01-28 03:43:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:43:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348832531] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:43:18,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:43:18,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 26 [2023-01-28 03:43:18,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628087429] [2023-01-28 03:43:18,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:43:18,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 03:43:18,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:43:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 03:43:18,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=609, Unknown=5, NotChecked=0, Total=756 [2023-01-28 03:43:18,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 458 [2023-01-28 03:43:18,769 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) [2023-01-28 03:43:18,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:43:18,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 458 [2023-01-28 03:43:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:43:21,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:43:23,799 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] [2023-01-28 03:43:38,694 INFO L130 PetriNetUnfolder]: 84742/112047 cut-off events. [2023-01-28 03:43:38,695 INFO L131 PetriNetUnfolder]: For 158294/158294 co-relation queries the response was YES. [2023-01-28 03:43:38,953 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. [2023-01-28 03:43:39,345 INFO L137 encePairwiseOnDemand]: 440/458 looper letters, 921 selfloop transitions, 245 changer transitions 97/1263 dead transitions. [2023-01-28 03:43:39,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 1263 transitions, 7819 flow [2023-01-28 03:43:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-28 03:43:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-28 03:43:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 9493 transitions. [2023-01-28 03:43:39,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31887806516627476 [2023-01-28 03:43:39,368 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 9493 transitions. [2023-01-28 03:43:39,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 9493 transitions. [2023-01-28 03:43:39,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:43:39,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 9493 transitions. [2023-01-28 03:43:39,385 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) [2023-01-28 03:43:39,415 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) [2023-01-28 03:43:39,422 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) [2023-01-28 03:43:39,423 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 227 flow. Second operand 65 states and 9493 transitions. [2023-01-28 03:43:39,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 1263 transitions, 7819 flow [2023-01-28 03:43:39,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 1263 transitions, 7664 flow, removed 75 selfloop flow, removed 1 redundant places. [2023-01-28 03:43:39,582 INFO L231 Difference]: Finished difference. Result has 160 places, 352 transitions, 2933 flow [2023-01-28 03:43:39,582 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} [2023-01-28 03:43:39,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2023-01-28 03:43:39,583 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 352 transitions, 2933 flow [2023-01-28 03:43:39,584 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) [2023-01-28 03:43:39,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:43:39,584 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] [2023-01-28 03:43:39,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 03:43:39,791 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 [2023-01-28 03:43:39,792 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)] === [2023-01-28 03:43:39,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:43:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1387397044, now seen corresponding path program 2 times [2023-01-28 03:43:39,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:43:39,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380957077] [2023-01-28 03:43:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:43:39,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:43:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:43:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:43:40,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:43:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380957077] [2023-01-28 03:43:40,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380957077] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:43:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512377876] [2023-01-28 03:43:40,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:43:40,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:43:40,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:43:40,693 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) [2023-01-28 03:43:40,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 03:43:40,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:43:40,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:43:40,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 03:43:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:43:40,869 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 [2023-01-28 03:43:40,959 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 [2023-01-28 03:43:41,006 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 [2023-01-28 03:43:41,083 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 [2023-01-28 03:43:41,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:43:41,177 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 [2023-01-28 03:43:41,268 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 [2023-01-28 03:43:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:43:41,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:43:41,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:43:41,742 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 [2023-01-28 03:43:41,753 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 [2023-01-28 03:43:41,791 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 [2023-01-28 03:43:41,802 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 [2023-01-28 03:43:41,810 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 [2023-01-28 03:43:41,826 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 [2023-01-28 03:43:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:43:42,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512377876] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:43:42,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:43:42,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-01-28 03:43:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104648186] [2023-01-28 03:43:42,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:43:42,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:43:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:43:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:43:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=501, Unknown=12, NotChecked=0, Total=600 [2023-01-28 03:43:42,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 458 [2023-01-28 03:43:42,164 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) [2023-01-28 03:43:42,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:43:42,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 458 [2023-01-28 03:43:42,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:43:58,415 INFO L130 PetriNetUnfolder]: 89637/117920 cut-off events. [2023-01-28 03:43:58,415 INFO L131 PetriNetUnfolder]: For 1399113/1402865 co-relation queries the response was YES. [2023-01-28 03:43:59,895 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. [2023-01-28 03:44:00,318 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 370 selfloop transitions, 98 changer transitions 27/526 dead transitions. [2023-01-28 03:44:00,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 526 transitions, 5173 flow [2023-01-28 03:44:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 03:44:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 03:44:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2641 transitions. [2023-01-28 03:44:00,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391985615206781 [2023-01-28 03:44:00,323 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2641 transitions. [2023-01-28 03:44:00,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2641 transitions. [2023-01-28 03:44:00,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:44:00,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2641 transitions. [2023-01-28 03:44:00,328 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) [2023-01-28 03:44:00,334 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) [2023-01-28 03:44:00,335 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) [2023-01-28 03:44:00,335 INFO L175 Difference]: Start difference. First operand has 160 places, 352 transitions, 2933 flow. Second operand 17 states and 2641 transitions. [2023-01-28 03:44:00,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 526 transitions, 5173 flow [2023-01-28 03:44:24,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 526 transitions, 4767 flow, removed 202 selfloop flow, removed 3 redundant places. [2023-01-28 03:44:24,860 INFO L231 Difference]: Finished difference. Result has 175 places, 362 transitions, 2964 flow [2023-01-28 03:44:24,860 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} [2023-01-28 03:44:24,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2023-01-28 03:44:24,862 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 362 transitions, 2964 flow [2023-01-28 03:44:24,863 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) [2023-01-28 03:44:24,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:44:24,863 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] [2023-01-28 03:44:24,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 03:44:25,068 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 [2023-01-28 03:44:25,069 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)] === [2023-01-28 03:44:25,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:44:25,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1080676777, now seen corresponding path program 3 times [2023-01-28 03:44:25,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:44:25,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441206742] [2023-01-28 03:44:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:44:25,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:44:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:44:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:44:26,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:44:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441206742] [2023-01-28 03:44:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441206742] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:44:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462512347] [2023-01-28 03:44:26,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:44:26,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:44:26,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:44:26,203 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) [2023-01-28 03:44:26,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 03:44:26,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:44:26,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:44:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 03:44:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:44:26,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:44:26,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 03:44:26,620 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 [2023-01-28 03:44:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:44:26,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:44:26,683 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_300 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_300) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-01-28 03:44:26,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:44:26,694 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 [2023-01-28 03:44:26,696 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 [2023-01-28 03:44:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 03:44:26,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462512347] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:44:26,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:44:26,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-01-28 03:44:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583829225] [2023-01-28 03:44:26,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:44:26,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 03:44:26,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:44:26,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 03:44:26,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=325, Unknown=1, NotChecked=36, Total=420 [2023-01-28 03:44:26,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 458 [2023-01-28 03:44:26,798 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) [2023-01-28 03:44:26,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:44:26,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 458 [2023-01-28 03:44:26,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:44:49,919 INFO L130 PetriNetUnfolder]: 124985/165112 cut-off events. [2023-01-28 03:44:49,919 INFO L131 PetriNetUnfolder]: For 1917538/1922468 co-relation queries the response was YES. [2023-01-28 03:44:52,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830295 conditions, 165112 events. 124985/165112 cut-off events. For 1917538/1922468 co-relation queries the response was YES. Maximal size of possible extension queue 7049. Compared 1090874 event pairs, 17169 based on Foata normal form. 2273/163455 useless extension candidates. Maximal degree in co-relation 830149. Up to 98071 conditions per place. [2023-01-28 03:44:52,931 INFO L137 encePairwiseOnDemand]: 436/458 looper letters, 476 selfloop transitions, 219 changer transitions 14/740 dead transitions. [2023-01-28 03:44:52,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 740 transitions, 7229 flow [2023-01-28 03:44:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 03:44:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 03:44:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2419 transitions. [2023-01-28 03:44:52,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35211062590975256 [2023-01-28 03:44:52,938 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2419 transitions. [2023-01-28 03:44:52,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2419 transitions. [2023-01-28 03:44:52,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:44:52,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2419 transitions. [2023-01-28 03:44:52,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 161.26666666666668) internal successors, (2419), 15 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:44:52,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 458.0) internal successors, (7328), 16 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:44:52,953 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 458.0) internal successors, (7328), 16 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:44:52,953 INFO L175 Difference]: Start difference. First operand has 175 places, 362 transitions, 2964 flow. Second operand 15 states and 2419 transitions. [2023-01-28 03:44:52,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 740 transitions, 7229 flow [2023-01-28 03:45:50,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 740 transitions, 7057 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-01-28 03:45:50,970 INFO L231 Difference]: Finished difference. Result has 179 places, 504 transitions, 4873 flow [2023-01-28 03:45:50,971 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=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4873, PETRI_PLACES=179, PETRI_TRANSITIONS=504} [2023-01-28 03:45:50,972 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2023-01-28 03:45:50,972 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 504 transitions, 4873 flow [2023-01-28 03:45:50,973 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) [2023-01-28 03:45:50,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:50,973 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] [2023-01-28 03:45:50,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:51,177 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 [2023-01-28 03:45:51,178 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)] === [2023-01-28 03:45:51,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:51,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1641196139, now seen corresponding path program 4 times [2023-01-28 03:45:51,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:51,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024233220] [2023-01-28 03:45:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:52,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024233220] [2023-01-28 03:45:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024233220] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:52,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504723831] [2023-01-28 03:45:52,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:45:52,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:52,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:52,236 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) [2023-01-28 03:45:52,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 03:45:52,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:45:52,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 03:45:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:45:52,627 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 [2023-01-28 03:45:52,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:45:52,675 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 [2023-01-28 03:45:52,794 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 [2023-01-28 03:45:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:52,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:53,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:53,020 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 [2023-01-28 03:45:53,036 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 [2023-01-28 03:45:53,041 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 [2023-01-28 03:45:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504723831] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:53,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:53,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 03:45:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137858452] [2023-01-28 03:45:53,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:53,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 03:45:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 03:45:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=602, Unknown=2, NotChecked=0, Total=702 [2023-01-28 03:45:53,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 458 [2023-01-28 03:45:53,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 504 transitions, 4873 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) [2023-01-28 03:45:53,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:53,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 458 [2023-01-28 03:45:53,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand