/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:09:44,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:09:44,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:09:44,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:09:44,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:09:44,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:09:44,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:09:44,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:09:44,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:09:44,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:09:44,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:09:44,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:09:44,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:09:44,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:09:44,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:09:44,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:09:44,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:09:44,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:09:44,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:09:44,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:09:44,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:09:44,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:09:44,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:09:44,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:09:44,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 23:09:44,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 23:09:44,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 23:09:44,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 23:09:44,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 23:09:44,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 23:09:44,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 23:09:44,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 23:09:44,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 23:09:44,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 23:09:44,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 23:09:44,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 23:09:44,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 23:09:44,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 23:09:44,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:09:44,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:09:44,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:09:44,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 23:09:44,849 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:09:44,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:09:44,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:09:44,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:09:44,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:09:44,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:09:44,850 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:09:44,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:09:44,850 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:09:44,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:09:44,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:09:44,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:09:44,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:09:44,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:09:44,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:09:44,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:09:44,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:09:44,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:09:44,852 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:09:44,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:09:44,852 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 23:09:45,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:09:45,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:09:45,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:09:45,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:09:45,016 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:09:45,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-01-27 23:09:46,062 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:09:46,220 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:09:46,220 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-01-27 23:09:46,225 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65758e527/654962baf2ab4daeaf41b7cd71c04a44/FLAG52caf4194 [2023-01-27 23:09:46,236 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65758e527/654962baf2ab4daeaf41b7cd71c04a44 [2023-01-27 23:09:46,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:09:46,239 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:09:46,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:09:46,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:09:46,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:09:46,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59832059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46, skipping insertion in model container [2023-01-27 23:09:46,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:09:46,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:09:46,389 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-01-27 23:09:46,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:09:46,403 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:09:46,430 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/unroll-3.wvr.c[2500,2513] [2023-01-27 23:09:46,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:09:46,444 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:09:46,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46 WrapperNode [2023-01-27 23:09:46,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:09:46,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:09:46,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:09:46,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:09:46,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,504 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 147 [2023-01-27 23:09:46,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:09:46,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:09:46,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:09:46,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:09:46,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,521 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:09:46,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:09:46,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:09:46,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:09:46,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (1/1) ... [2023-01-27 23:09:46,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:09:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:46,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 23:09:46,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 23:09:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:09:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 23:09:46,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 23:09:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 23:09:46,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 23:09:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:09:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:09:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:09:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 23:09:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:09:46,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:09:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:09:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:09:46,582 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 23:09:46,670 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:09:46,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:09:46,939 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:09:46,945 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:09:46,945 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 23:09:46,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:09:46 BoogieIcfgContainer [2023-01-27 23:09:46,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:09:46,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:09:46,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:09:46,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:09:46,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:09:46" (1/3) ... [2023-01-27 23:09:46,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65de15b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:09:46, skipping insertion in model container [2023-01-27 23:09:46,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:09:46" (2/3) ... [2023-01-27 23:09:46,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65de15b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:09:46, skipping insertion in model container [2023-01-27 23:09:46,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:09:46" (3/3) ... [2023-01-27 23:09:46,952 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-01-27 23:09:46,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:09:46,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 23:09:46,974 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:09:47,037 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 23:09:47,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 170 transitions, 356 flow [2023-01-27 23:09:47,118 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-01-27 23:09:47,118 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:09:47,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 167 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-27 23:09:47,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 170 transitions, 356 flow [2023-01-27 23:09:47,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 160 transitions, 332 flow [2023-01-27 23:09:47,128 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:09:47,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 160 transitions, 332 flow [2023-01-27 23:09:47,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 160 transitions, 332 flow [2023-01-27 23:09:47,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 160 transitions, 332 flow [2023-01-27 23:09:47,193 INFO L130 PetriNetUnfolder]: 15/160 cut-off events. [2023-01-27 23:09:47,194 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:09:47,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 15/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-27 23:09:47,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 2592 [2023-01-27 23:09:50,704 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-01-27 23:09:50,705 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-01-27 23:09:50,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:09:50,746 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;@4564c3ba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:09:50,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 23:09:50,765 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 23:09:50,765 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:09:50,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:50,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:50,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:50,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1588788240, now seen corresponding path program 1 times [2023-01-27 23:09:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:50,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669395868] [2023-01-27 23:09:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:51,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669395868] [2023-01-27 23:09:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669395868] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:51,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:51,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:09:51,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944604912] [2023-01-27 23:09:51,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:51,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:09:51,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:09:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:09:51,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-01-27 23:09:51,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:51,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-01-27 23:09:51,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:51,168 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-01-27 23:09:51,168 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 23:09:51,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 188 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-01-27 23:09:51,169 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-27 23:09:51,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-01-27 23:09:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:09:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:09:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-01-27 23:09:51,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415962441314554 [2023-01-27 23:09:51,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-01-27 23:09:51,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-01-27 23:09:51,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:51,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-01-27 23:09:51,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,206 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 443 transitions. [2023-01-27 23:09:51,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-01-27 23:09:51,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 23:09:51,210 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-27 23:09:51,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-27 23:09:51,214 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-27 23:09:51,214 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-27 23:09:51,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:51,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:51,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:09:51,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:51,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash -300848525, now seen corresponding path program 1 times [2023-01-27 23:09:51,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:51,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636530699] [2023-01-27 23:09:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:51,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:51,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636530699] [2023-01-27 23:09:51,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636530699] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:51,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:51,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 23:09:51,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567170721] [2023-01-27 23:09:51,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:51,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:09:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:09:51,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:09:51,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 355 [2023-01-27 23:09:51,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:51,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 355 [2023-01-27 23:09:51,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:51,452 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-01-27 23:09:51,452 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:09:51,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 315 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-01-27 23:09:51,454 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-01-27 23:09:51,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-01-27 23:09:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:09:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:09:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-01-27 23:09:51,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131455399061033 [2023-01-27 23:09:51,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-01-27 23:09:51,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-01-27 23:09:51,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:51,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-01-27 23:09:51,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,459 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 440 transitions. [2023-01-27 23:09:51,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-01-27 23:09:51,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 23:09:51,460 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-01-27 23:09:51,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-01-27 23:09:51,460 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-27 23:09:51,460 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-01-27 23:09:51,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:51,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:51,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:09:51,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:51,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1190840402, now seen corresponding path program 1 times [2023-01-27 23:09:51,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:51,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845677657] [2023-01-27 23:09:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:51,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:51,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:51,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845677657] [2023-01-27 23:09:51,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845677657] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:51,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:51,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:09:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871869036] [2023-01-27 23:09:51,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:51,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:09:51,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:09:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:09:51,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:09:51,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:51,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:09:51,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:51,724 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-01-27 23:09:51,724 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-27 23:09:51,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 568 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-01-27 23:09:51,727 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-01-27 23:09:51,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-01-27 23:09:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:09:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:09:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 721 transitions. [2023-01-27 23:09:51,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40619718309859154 [2023-01-27 23:09:51,729 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 721 transitions. [2023-01-27 23:09:51,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 721 transitions. [2023-01-27 23:09:51,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:51,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 721 transitions. [2023-01-27 23:09:51,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,733 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 721 transitions. [2023-01-27 23:09:51,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-01-27 23:09:51,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:09:51,735 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-01-27 23:09:51,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-01-27 23:09:51,736 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-27 23:09:51,738 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-01-27 23:09:51,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:51,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:51,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:51,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:09:51,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:51,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1541576124, now seen corresponding path program 2 times [2023-01-27 23:09:51,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:51,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834401658] [2023-01-27 23:09:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:51,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834401658] [2023-01-27 23:09:51,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834401658] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971786526] [2023-01-27 23:09:51,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:09:51,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:51,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:51,850 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:09:51,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 23:09:51,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:09:51,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:51,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:09:51,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:52,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971786526] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:52,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 23:09:52,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-01-27 23:09:52,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366503132] [2023-01-27 23:09:52,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:52,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:09:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:09:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:09:52,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 355 [2023-01-27 23:09:52,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:52,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 355 [2023-01-27 23:09:52,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:52,115 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-01-27 23:09:52,115 INFO L131 PetriNetUnfolder]: For 133/144 co-relation queries the response was YES. [2023-01-27 23:09:52,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 133/144 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 24 based on Foata normal form. 7/168 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-01-27 23:09:52,116 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-01-27 23:09:52,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-01-27 23:09:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:09:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:09:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-01-27 23:09:52,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253521126760563 [2023-01-27 23:09:52,120 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-01-27 23:09:52,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-01-27 23:09:52,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:52,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-01-27 23:09:52,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,124 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,125 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 604 transitions. [2023-01-27 23:09:52,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-01-27 23:09:52,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 23:09:52,127 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-01-27 23:09:52,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-01-27 23:09:52,128 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-01-27 23:09:52,128 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-01-27 23:09:52,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:52,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:52,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 23:09:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:52,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:52,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash -688555301, now seen corresponding path program 1 times [2023-01-27 23:09:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:52,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351035317] [2023-01-27 23:09:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:52,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351035317] [2023-01-27 23:09:52,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351035317] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:52,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:52,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:09:52,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938415651] [2023-01-27 23:09:52,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:52,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:09:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:09:52,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:09:52,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:09:52,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:52,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:09:52,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:52,579 INFO L130 PetriNetUnfolder]: 95/188 cut-off events. [2023-01-27 23:09:52,579 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-01-27 23:09:52,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 188 events. 95/188 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 634 event pairs, 28 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 568. Up to 93 conditions per place. [2023-01-27 23:09:52,580 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2023-01-27 23:09:52,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 309 flow [2023-01-27 23:09:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:09:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:09:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 861 transitions. [2023-01-27 23:09:52,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042253521126761 [2023-01-27 23:09:52,582 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 861 transitions. [2023-01-27 23:09:52,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 861 transitions. [2023-01-27 23:09:52,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:52,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 861 transitions. [2023-01-27 23:09:52,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,588 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,588 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 6 states and 861 transitions. [2023-01-27 23:09:52,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 309 flow [2023-01-27 23:09:52,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:09:52,589 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 163 flow [2023-01-27 23:09:52,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-01-27 23:09:52,590 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-01-27 23:09:52,590 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 163 flow [2023-01-27 23:09:52,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:52,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:52,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 23:09:52,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:52,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1929012174, now seen corresponding path program 3 times [2023-01-27 23:09:52,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:52,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776085624] [2023-01-27 23:09:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:52,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:52,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:52,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776085624] [2023-01-27 23:09:52,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776085624] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:52,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:52,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:09:52,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396264279] [2023-01-27 23:09:52,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:52,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:09:52,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:52,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:09:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:09:52,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 355 [2023-01-27 23:09:52,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:52,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 355 [2023-01-27 23:09:52,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:52,717 INFO L130 PetriNetUnfolder]: 88/163 cut-off events. [2023-01-27 23:09:52,718 INFO L131 PetriNetUnfolder]: For 349/352 co-relation queries the response was YES. [2023-01-27 23:09:52,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 163 events. 88/163 cut-off events. For 349/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 511 event pairs, 22 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 619. Up to 95 conditions per place. [2023-01-27 23:09:52,719 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 24 selfloop transitions, 10 changer transitions 4/40 dead transitions. [2023-01-27 23:09:52,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 297 flow [2023-01-27 23:09:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:09:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:09:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 603 transitions. [2023-01-27 23:09:52,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42464788732394365 [2023-01-27 23:09:52,720 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 603 transitions. [2023-01-27 23:09:52,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 603 transitions. [2023-01-27 23:09:52,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:52,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 603 transitions. [2023-01-27 23:09:52,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,724 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,724 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 163 flow. Second operand 4 states and 603 transitions. [2023-01-27 23:09:52,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 297 flow [2023-01-27 23:09:52,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 278 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-27 23:09:52,726 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 193 flow [2023-01-27 23:09:52,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-01-27 23:09:52,726 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-01-27 23:09:52,727 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 193 flow [2023-01-27 23:09:52,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:52,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 23:09:52,727 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:52,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1410892719, now seen corresponding path program 2 times [2023-01-27 23:09:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:52,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505923957] [2023-01-27 23:09:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:52,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:52,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505923957] [2023-01-27 23:09:52,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505923957] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:52,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:52,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:09:52,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621136609] [2023-01-27 23:09:52,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:52,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:09:52,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:09:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:09:52,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:09:52,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:52,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:09:52,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:52,901 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2023-01-27 23:09:52,901 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-01-27 23:09:52,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 154 events. 87/154 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 426 event pairs, 2 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 620. Up to 82 conditions per place. [2023-01-27 23:09:52,903 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-01-27 23:09:52,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 354 flow [2023-01-27 23:09:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:09:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:09:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 858 transitions. [2023-01-27 23:09:52,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-01-27 23:09:52,905 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 858 transitions. [2023-01-27 23:09:52,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 858 transitions. [2023-01-27 23:09:52,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:52,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 858 transitions. [2023-01-27 23:09:52,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,910 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,910 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 193 flow. Second operand 6 states and 858 transitions. [2023-01-27 23:09:52,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 354 flow [2023-01-27 23:09:52,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 327 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-27 23:09:52,911 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 223 flow [2023-01-27 23:09:52,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-01-27 23:09:52,912 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-01-27 23:09:52,912 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 223 flow [2023-01-27 23:09:52,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:52,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:52,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 23:09:52,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:52,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:52,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1350358541, now seen corresponding path program 3 times [2023-01-27 23:09:52,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:52,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222083838] [2023-01-27 23:09:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:52,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:52,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222083838] [2023-01-27 23:09:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222083838] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:09:52,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:09:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:09:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168264431] [2023-01-27 23:09:52,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:09:52,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:09:52,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:09:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:09:52,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:09:52,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:52,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:52,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:09:52,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:53,071 INFO L130 PetriNetUnfolder]: 98/181 cut-off events. [2023-01-27 23:09:53,071 INFO L131 PetriNetUnfolder]: For 604/604 co-relation queries the response was YES. [2023-01-27 23:09:53,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 181 events. 98/181 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 526 event pairs, 31 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 745. Up to 124 conditions per place. [2023-01-27 23:09:53,073 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 37 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2023-01-27 23:09:53,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 402 flow [2023-01-27 23:09:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:09:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:09:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 715 transitions. [2023-01-27 23:09:53,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-01-27 23:09:53,075 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 715 transitions. [2023-01-27 23:09:53,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 715 transitions. [2023-01-27 23:09:53,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:53,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 715 transitions. [2023-01-27 23:09:53,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,079 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,079 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 223 flow. Second operand 5 states and 715 transitions. [2023-01-27 23:09:53,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 402 flow [2023-01-27 23:09:53,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 364 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-27 23:09:53,081 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 245 flow [2023-01-27 23:09:53,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-01-27 23:09:53,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-01-27 23:09:53,081 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 245 flow [2023-01-27 23:09:53,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:53,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:53,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 23:09:53,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:53,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1909704249, now seen corresponding path program 4 times [2023-01-27 23:09:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264357400] [2023-01-27 23:09:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:53,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:53,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264357400] [2023-01-27 23:09:53,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264357400] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:53,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826203746] [2023-01-27 23:09:53,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:09:53,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:53,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:53,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:09:53,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 23:09:53,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:09:53,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:53,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:09:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:53,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:53,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826203746] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:53,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:53,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-01-27 23:09:53,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248309200] [2023-01-27 23:09:53,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:53,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 23:09:53,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 23:09:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-27 23:09:53,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:09:53,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 139.57142857142858) internal successors, (977), 7 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:53,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:09:53,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:53,423 INFO L130 PetriNetUnfolder]: 113/206 cut-off events. [2023-01-27 23:09:53,423 INFO L131 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2023-01-27 23:09:53,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 206 events. 113/206 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 28 based on Foata normal form. 6/211 useless extension candidates. Maximal degree in co-relation 919. Up to 127 conditions per place. [2023-01-27 23:09:53,424 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 40 selfloop transitions, 17 changer transitions 2/59 dead transitions. [2023-01-27 23:09:53,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 498 flow [2023-01-27 23:09:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 23:09:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 23:09:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1000 transitions. [2023-01-27 23:09:53,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024144869215292 [2023-01-27 23:09:53,427 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1000 transitions. [2023-01-27 23:09:53,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1000 transitions. [2023-01-27 23:09:53,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:53,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1000 transitions. [2023-01-27 23:09:53,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.85714285714286) internal successors, (1000), 7 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,431 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,431 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 245 flow. Second operand 7 states and 1000 transitions. [2023-01-27 23:09:53,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 498 flow [2023-01-27 23:09:53,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 466 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-27 23:09:53,434 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 306 flow [2023-01-27 23:09:53,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-01-27 23:09:53,434 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-01-27 23:09:53,434 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 306 flow [2023-01-27 23:09:53,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.57142857142858) internal successors, (977), 7 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:53,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:53,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 23:09:53,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-01-27 23:09:53,642 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:53,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash -272112479, now seen corresponding path program 5 times [2023-01-27 23:09:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088589526] [2023-01-27 23:09:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088589526] [2023-01-27 23:09:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088589526] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959455420] [2023-01-27 23:09:53,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:09:53,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:53,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:53,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:09:53,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 23:09:53,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:09:53,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:53,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:09:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:53,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:53,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959455420] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:53,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 23:09:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814379742] [2023-01-27 23:09:53,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 23:09:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 23:09:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-01-27 23:09:53,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:09:53,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 138.75) internal successors, (1110), 8 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:53,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:09:53,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:53,939 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-01-27 23:09:53,940 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-01-27 23:09:53,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 192 events. 107/192 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 550 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 879. Up to 136 conditions per place. [2023-01-27 23:09:53,941 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 33 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2023-01-27 23:09:53,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 464 flow [2023-01-27 23:09:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:09:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:09:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 716 transitions. [2023-01-27 23:09:53,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40338028169014084 [2023-01-27 23:09:53,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 716 transitions. [2023-01-27 23:09:53,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 716 transitions. [2023-01-27 23:09:53,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:53,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 716 transitions. [2023-01-27 23:09:53,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,946 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,946 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 306 flow. Second operand 5 states and 716 transitions. [2023-01-27 23:09:53,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 464 flow [2023-01-27 23:09:53,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 429 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-27 23:09:53,948 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 308 flow [2023-01-27 23:09:53,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-01-27 23:09:53,949 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-01-27 23:09:53,949 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 308 flow [2023-01-27 23:09:53,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.75) internal successors, (1110), 8 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:53,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:53,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:53,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 23:09:54,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:54,154 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:54,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:54,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1221792128, now seen corresponding path program 1 times [2023-01-27 23:09:54,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:54,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195646959] [2023-01-27 23:09:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:54,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 23:09:54,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195646959] [2023-01-27 23:09:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195646959] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557729334] [2023-01-27 23:09:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:54,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:54,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:54,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:09:54,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 23:09:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:54,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 23:09:54,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:54,602 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-01-27 23:09:54,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 26 [2023-01-27 23:09:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:54,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:54,727 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-01-27 23:09:54,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-01-27 23:09:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:54,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557729334] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:54,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:54,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-01-27 23:09:54,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522928524] [2023-01-27 23:09:54,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:54,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:09:54,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:54,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:09:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-27 23:09:54,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 355 [2023-01-27 23:09:54,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 308 flow. Second operand has 14 states, 14 states have (on average 106.07142857142857) internal successors, (1485), 14 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:54,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:54,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 355 [2023-01-27 23:09:54,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:55,626 INFO L130 PetriNetUnfolder]: 285/505 cut-off events. [2023-01-27 23:09:55,626 INFO L131 PetriNetUnfolder]: For 1844/1886 co-relation queries the response was YES. [2023-01-27 23:09:55,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 505 events. 285/505 cut-off events. For 1844/1886 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2095 event pairs, 18 based on Foata normal form. 58/557 useless extension candidates. Maximal degree in co-relation 2008. Up to 251 conditions per place. [2023-01-27 23:09:55,629 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 38 selfloop transitions, 23 changer transitions 77/141 dead transitions. [2023-01-27 23:09:55,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 141 transitions, 1231 flow [2023-01-27 23:09:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:09:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:09:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2380 transitions. [2023-01-27 23:09:55,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047375160051216 [2023-01-27 23:09:55,634 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2380 transitions. [2023-01-27 23:09:55,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2380 transitions. [2023-01-27 23:09:55,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:55,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2380 transitions. [2023-01-27 23:09:55,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.18181818181819) internal successors, (2380), 22 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:55,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:55,646 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:55,646 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 308 flow. Second operand 22 states and 2380 transitions. [2023-01-27 23:09:55,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 141 transitions, 1231 flow [2023-01-27 23:09:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 141 transitions, 1119 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-01-27 23:09:55,652 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 421 flow [2023-01-27 23:09:55,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=421, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2023-01-27 23:09:55,652 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-01-27 23:09:55,652 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 421 flow [2023-01-27 23:09:55,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.07142857142857) internal successors, (1485), 14 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:55,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:55,653 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:55,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-27 23:09:55,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:55,858 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:55,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash -200909318, now seen corresponding path program 2 times [2023-01-27 23:09:55,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:55,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811249122] [2023-01-27 23:09:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:55,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:09:56,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:56,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811249122] [2023-01-27 23:09:56,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811249122] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:56,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497104683] [2023-01-27 23:09:56,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:09:56,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:56,141 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:09:56,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 23:09:56,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:09:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:56,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 23:09:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:09:56,396 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:09:56,406 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-01-27 23:09:56,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-01-27 23:09:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:56,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:09:56,513 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-01-27 23:09:56,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-01-27 23:09:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:09:56,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497104683] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:09:56,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:09:56,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-01-27 23:09:56,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065802935] [2023-01-27 23:09:56,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:09:56,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 23:09:56,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:09:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 23:09:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-01-27 23:09:56,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 355 [2023-01-27 23:09:56,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 421 flow. Second operand has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:56,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:09:56,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 355 [2023-01-27 23:09:56,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:00,433 INFO L130 PetriNetUnfolder]: 229/420 cut-off events. [2023-01-27 23:10:00,433 INFO L131 PetriNetUnfolder]: For 2358/2379 co-relation queries the response was YES. [2023-01-27 23:10:00,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 420 events. 229/420 cut-off events. For 2358/2379 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1623 event pairs, 0 based on Foata normal form. 48/467 useless extension candidates. Maximal degree in co-relation 2425. Up to 208 conditions per place. [2023-01-27 23:10:00,435 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 78 selfloop transitions, 35 changer transitions 33/149 dead transitions. [2023-01-27 23:10:00,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1488 flow [2023-01-27 23:10:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 23:10:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 23:10:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2800 transitions. [2023-01-27 23:10:00,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30335861321776814 [2023-01-27 23:10:00,441 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2800 transitions. [2023-01-27 23:10:00,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2800 transitions. [2023-01-27 23:10:00,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:00,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2800 transitions. [2023-01-27 23:10:00,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 107.6923076923077) internal successors, (2800), 26 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:00,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:00,455 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:00,455 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 421 flow. Second operand 26 states and 2800 transitions. [2023-01-27 23:10:00,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1488 flow [2023-01-27 23:10:00,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 149 transitions, 1251 flow, removed 98 selfloop flow, removed 13 redundant places. [2023-01-27 23:10:00,461 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 582 flow [2023-01-27 23:10:00,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=582, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2023-01-27 23:10:00,462 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-01-27 23:10:00,462 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 582 flow [2023-01-27 23:10:00,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:00,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:00,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:00,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-27 23:10:00,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-27 23:10:00,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:00,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1769074402, now seen corresponding path program 3 times [2023-01-27 23:10:00,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:00,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698961811] [2023-01-27 23:10:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:00,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:01,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698961811] [2023-01-27 23:10:01,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698961811] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537689584] [2023-01-27 23:10:01,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:10:01,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:01,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:01,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:10:01,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 23:10:01,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:10:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 23:10:01,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:01,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:10:01,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:10:01,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:10:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:10:01,442 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-01-27 23:10:01,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-01-27 23:10:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:01,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:01,566 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (v_ArrVal_287 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_287) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))))) (or (<= c_~size~0 .cse0) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< .cse0 0) (= (select .cse1 (+ (* 4 .cse0) c_~f~0.offset)) (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset))))))) is different from false [2023-01-27 23:10:01,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:01,665 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 218 treesize of output 134 [2023-01-27 23:10:01,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:01,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 348 [2023-01-27 23:10:01,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:01,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 252 [2023-01-27 23:10:01,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:01,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 141 [2023-01-27 23:10:02,759 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 23:10:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-01-27 23:10:02,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537689584] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:02,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:02,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-01-27 23:10:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122341097] [2023-01-27 23:10:02,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:02,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:10:02,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:02,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:10:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=210, Unknown=1, NotChecked=30, Total=306 [2023-01-27 23:10:02,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-27 23:10:02,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 582 flow. Second operand has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:02,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:02,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-27 23:10:02,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:03,044 INFO L130 PetriNetUnfolder]: 174/328 cut-off events. [2023-01-27 23:10:03,044 INFO L131 PetriNetUnfolder]: For 1868/1895 co-relation queries the response was YES. [2023-01-27 23:10:03,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 328 events. 174/328 cut-off events. For 1868/1895 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1204 event pairs, 20 based on Foata normal form. 21/341 useless extension candidates. Maximal degree in co-relation 1918. Up to 210 conditions per place. [2023-01-27 23:10:03,047 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 30 selfloop transitions, 9 changer transitions 29/74 dead transitions. [2023-01-27 23:10:03,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 807 flow [2023-01-27 23:10:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:10:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:10:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 890 transitions. [2023-01-27 23:10:03,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31338028169014087 [2023-01-27 23:10:03,049 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 890 transitions. [2023-01-27 23:10:03,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 890 transitions. [2023-01-27 23:10:03,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:03,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 890 transitions. [2023-01-27 23:10:03,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.25) internal successors, (890), 8 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:03,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:03,053 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:03,053 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 582 flow. Second operand 8 states and 890 transitions. [2023-01-27 23:10:03,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 807 flow [2023-01-27 23:10:03,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 712 flow, removed 29 selfloop flow, removed 14 redundant places. [2023-01-27 23:10:03,057 INFO L231 Difference]: Finished difference. Result has 77 places, 42 transitions, 379 flow [2023-01-27 23:10:03,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=379, PETRI_PLACES=77, PETRI_TRANSITIONS=42} [2023-01-27 23:10:03,058 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-01-27 23:10:03,058 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 42 transitions, 379 flow [2023-01-27 23:10:03,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:03,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:03,058 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:03,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 23:10:03,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:03,263 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:03,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash 338363705, now seen corresponding path program 4 times [2023-01-27 23:10:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:03,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778163896] [2023-01-27 23:10:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:04,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:04,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778163896] [2023-01-27 23:10:04,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778163896] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:04,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745211937] [2023-01-27 23:10:04,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:10:04,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:04,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:04,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:10:04,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 23:10:04,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:10:04,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 23:10:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:05,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:05,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-27 23:10:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:05,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:05,247 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-27 23:10:05,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-27 23:10:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:10:05,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745211937] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:05,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:05,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-27 23:10:05,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042937634] [2023-01-27 23:10:05,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:10:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:10:05,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-01-27 23:10:05,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-27 23:10:05,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 42 transitions, 379 flow. Second operand has 20 states, 20 states have (on average 108.05) internal successors, (2161), 20 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:05,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:05,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-27 23:10:05,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:06,155 INFO L130 PetriNetUnfolder]: 428/757 cut-off events. [2023-01-27 23:10:06,155 INFO L131 PetriNetUnfolder]: For 4045/4087 co-relation queries the response was YES. [2023-01-27 23:10:06,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 757 events. 428/757 cut-off events. For 4045/4087 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3320 event pairs, 21 based on Foata normal form. 38/784 useless extension candidates. Maximal degree in co-relation 4027. Up to 385 conditions per place. [2023-01-27 23:10:06,160 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 90 selfloop transitions, 81 changer transitions 2/179 dead transitions. [2023-01-27 23:10:06,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 179 transitions, 1794 flow [2023-01-27 23:10:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 23:10:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 23:10:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2134 transitions. [2023-01-27 23:10:06,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31638250555967384 [2023-01-27 23:10:06,164 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2134 transitions. [2023-01-27 23:10:06,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2134 transitions. [2023-01-27 23:10:06,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:06,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2134 transitions. [2023-01-27 23:10:06,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 112.3157894736842) internal successors, (2134), 19 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:06,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:06,172 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:06,172 INFO L175 Difference]: Start difference. First operand has 77 places, 42 transitions, 379 flow. Second operand 19 states and 2134 transitions. [2023-01-27 23:10:06,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 179 transitions, 1794 flow [2023-01-27 23:10:06,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 1606 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-01-27 23:10:06,181 INFO L231 Difference]: Finished difference. Result has 76 places, 116 transitions, 1275 flow [2023-01-27 23:10:06,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1275, PETRI_PLACES=76, PETRI_TRANSITIONS=116} [2023-01-27 23:10:06,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-01-27 23:10:06,182 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 116 transitions, 1275 flow [2023-01-27 23:10:06,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.05) internal successors, (2161), 20 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:06,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:06,182 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:06,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:06,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:06,387 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:06,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1347173951, now seen corresponding path program 5 times [2023-01-27 23:10:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:06,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823742310] [2023-01-27 23:10:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:06,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:07,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:07,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823742310] [2023-01-27 23:10:07,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823742310] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:07,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318512595] [2023-01-27 23:10:07,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:10:07,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:07,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:10:07,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 23:10:07,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:10:07,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:07,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 23:10:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:07,766 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:10:07,805 INFO L321 Elim1Store]: treesize reduction 90, result has 27.4 percent of original size [2023-01-27 23:10:07,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 60 [2023-01-27 23:10:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:07,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:07,995 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-27 23:10:07,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-27 23:10:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318512595] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:08,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:08,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-01-27 23:10:08,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846645984] [2023-01-27 23:10:08,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 23:10:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 23:10:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-01-27 23:10:08,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-27 23:10:08,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 116 transitions, 1275 flow. Second operand has 21 states, 21 states have (on average 107.95238095238095) internal successors, (2267), 21 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:08,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:08,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-27 23:10:08,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:08,782 INFO L130 PetriNetUnfolder]: 586/1045 cut-off events. [2023-01-27 23:10:08,782 INFO L131 PetriNetUnfolder]: For 4506/4542 co-relation queries the response was YES. [2023-01-27 23:10:08,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5502 conditions, 1045 events. 586/1045 cut-off events. For 4506/4542 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5045 event pairs, 64 based on Foata normal form. 30/1064 useless extension candidates. Maximal degree in co-relation 4905. Up to 610 conditions per place. [2023-01-27 23:10:08,788 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 115 selfloop transitions, 80 changer transitions 2/203 dead transitions. [2023-01-27 23:10:08,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 203 transitions, 2226 flow [2023-01-27 23:10:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 23:10:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 23:10:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2236 transitions. [2023-01-27 23:10:08,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3149295774647887 [2023-01-27 23:10:08,791 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2236 transitions. [2023-01-27 23:10:08,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2236 transitions. [2023-01-27 23:10:08,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:08,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2236 transitions. [2023-01-27 23:10:08,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.8) internal successors, (2236), 20 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:08,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:08,798 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:08,798 INFO L175 Difference]: Start difference. First operand has 76 places, 116 transitions, 1275 flow. Second operand 20 states and 2236 transitions. [2023-01-27 23:10:08,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 203 transitions, 2226 flow [2023-01-27 23:10:08,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 203 transitions, 1978 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-01-27 23:10:08,808 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1603 flow [2023-01-27 23:10:08,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1603, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2023-01-27 23:10:08,808 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-01-27 23:10:08,808 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1603 flow [2023-01-27 23:10:08,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.95238095238095) internal successors, (2267), 21 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:08,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:08,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:08,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:09,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 23:10:09,014 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:09,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:09,014 INFO L85 PathProgramCache]: Analyzing trace with hash -182781255, now seen corresponding path program 6 times [2023-01-27 23:10:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:09,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945170096] [2023-01-27 23:10:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:09,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945170096] [2023-01-27 23:10:09,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945170096] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058168856] [2023-01-27 23:10:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:10:09,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:09,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:10:09,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 23:10:10,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:10:10,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 23:10:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:10,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:10,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-27 23:10:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:10,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:10,327 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-27 23:10:10,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-27 23:10:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:10:10,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058168856] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:10,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:10,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-27 23:10:10,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650582293] [2023-01-27 23:10:10,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:10,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:10:10,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:10:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-01-27 23:10:10,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-27 23:10:10,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1603 flow. Second operand has 20 states, 20 states have (on average 108.15) internal successors, (2163), 20 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:10,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:10,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-27 23:10:10,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:11,175 INFO L130 PetriNetUnfolder]: 758/1356 cut-off events. [2023-01-27 23:10:11,175 INFO L131 PetriNetUnfolder]: For 5979/6017 co-relation queries the response was YES. [2023-01-27 23:10:11,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 1356 events. 758/1356 cut-off events. For 5979/6017 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6998 event pairs, 117 based on Foata normal form. 33/1378 useless extension candidates. Maximal degree in co-relation 6966. Up to 938 conditions per place. [2023-01-27 23:10:11,183 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 139 selfloop transitions, 70 changer transitions 1/216 dead transitions. [2023-01-27 23:10:11,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2546 flow [2023-01-27 23:10:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 23:10:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 23:10:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1894 transitions. [2023-01-27 23:10:11,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31383595691797844 [2023-01-27 23:10:11,186 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1894 transitions. [2023-01-27 23:10:11,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1894 transitions. [2023-01-27 23:10:11,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:11,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1894 transitions. [2023-01-27 23:10:11,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 111.41176470588235) internal successors, (1894), 17 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:11,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:11,192 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:11,192 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1603 flow. Second operand 17 states and 1894 transitions. [2023-01-27 23:10:11,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2546 flow [2023-01-27 23:10:11,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 2383 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-01-27 23:10:11,208 INFO L231 Difference]: Finished difference. Result has 109 places, 172 transitions, 2020 flow [2023-01-27 23:10:11,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2020, PETRI_PLACES=109, PETRI_TRANSITIONS=172} [2023-01-27 23:10:11,208 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2023-01-27 23:10:11,208 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 172 transitions, 2020 flow [2023-01-27 23:10:11,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.15) internal successors, (2163), 20 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:11,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:11,209 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:11,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-27 23:10:11,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 23:10:11,414 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:11,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2064264659, now seen corresponding path program 7 times [2023-01-27 23:10:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519577470] [2023-01-27 23:10:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:11,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:12,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519577470] [2023-01-27 23:10:12,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519577470] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770795468] [2023-01-27 23:10:12,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:10:12,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:12,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:12,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:10:12,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 23:10:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 23:10:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:12,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:12,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-27 23:10:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:12,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:12,448 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-27 23:10:12,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-27 23:10:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:12,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770795468] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:12,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:12,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-27 23:10:12,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38392812] [2023-01-27 23:10:12,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:12,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:10:12,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:12,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:10:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-01-27 23:10:12,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 355 [2023-01-27 23:10:12,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 172 transitions, 2020 flow. Second operand has 20 states, 20 states have (on average 115.15) internal successors, (2303), 20 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:12,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:12,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 355 [2023-01-27 23:10:12,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:13,227 INFO L130 PetriNetUnfolder]: 1038/1864 cut-off events. [2023-01-27 23:10:13,227 INFO L131 PetriNetUnfolder]: For 8651/8693 co-relation queries the response was YES. [2023-01-27 23:10:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9823 conditions, 1864 events. 1038/1864 cut-off events. For 8651/8693 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10420 event pairs, 189 based on Foata normal form. 37/1890 useless extension candidates. Maximal degree in co-relation 9771. Up to 1242 conditions per place. [2023-01-27 23:10:13,239 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 189 selfloop transitions, 80 changer transitions 2/277 dead transitions. [2023-01-27 23:10:13,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 277 transitions, 3452 flow [2023-01-27 23:10:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 23:10:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 23:10:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2372 transitions. [2023-01-27 23:10:13,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3340845070422535 [2023-01-27 23:10:13,242 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2372 transitions. [2023-01-27 23:10:13,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2372 transitions. [2023-01-27 23:10:13,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:13,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2372 transitions. [2023-01-27 23:10:13,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 118.6) internal successors, (2372), 20 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:13,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:13,249 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:13,249 INFO L175 Difference]: Start difference. First operand has 109 places, 172 transitions, 2020 flow. Second operand 20 states and 2372 transitions. [2023-01-27 23:10:13,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 277 transitions, 3452 flow [2023-01-27 23:10:13,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 277 transitions, 3292 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-01-27 23:10:13,271 INFO L231 Difference]: Finished difference. Result has 126 places, 218 transitions, 2810 flow [2023-01-27 23:10:13,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2810, PETRI_PLACES=126, PETRI_TRANSITIONS=218} [2023-01-27 23:10:13,272 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-01-27 23:10:13,272 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 218 transitions, 2810 flow [2023-01-27 23:10:13,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 115.15) internal successors, (2303), 20 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:13,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:13,273 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:13,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:13,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 23:10:13,478 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:13,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:13,478 INFO L85 PathProgramCache]: Analyzing trace with hash -927240523, now seen corresponding path program 8 times [2023-01-27 23:10:13,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:13,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103266121] [2023-01-27 23:10:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:13,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:14,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:14,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103266121] [2023-01-27 23:10:14,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103266121] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:14,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961813378] [2023-01-27 23:10:14,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:10:14,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:14,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:10:14,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 23:10:14,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:10:14,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:14,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 23:10:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:14,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:10:14,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:10:14,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:14,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-27 23:10:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:14,520 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_458 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_458) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4)))))) is different from false [2023-01-27 23:10:14,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:14,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-01-27 23:10:14,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:14,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-01-27 23:10:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:15,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961813378] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:15,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:15,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-27 23:10:15,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822627718] [2023-01-27 23:10:15,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:15,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 23:10:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 23:10:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=437, Unknown=1, NotChecked=42, Total=552 [2023-01-27 23:10:15,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 355 [2023-01-27 23:10:15,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 218 transitions, 2810 flow. Second operand has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:15,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:15,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 355 [2023-01-27 23:10:15,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:16,358 INFO L130 PetriNetUnfolder]: 1315/2368 cut-off events. [2023-01-27 23:10:16,359 INFO L131 PetriNetUnfolder]: For 12875/12917 co-relation queries the response was YES. [2023-01-27 23:10:16,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13103 conditions, 2368 events. 1315/2368 cut-off events. For 12875/12917 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13799 event pairs, 202 based on Foata normal form. 36/2393 useless extension candidates. Maximal degree in co-relation 13044. Up to 1492 conditions per place. [2023-01-27 23:10:16,375 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 188 selfloop transitions, 138 changer transitions 2/334 dead transitions. [2023-01-27 23:10:16,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 334 transitions, 4559 flow [2023-01-27 23:10:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:10:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:10:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2522 transitions. [2023-01-27 23:10:16,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229193341869398 [2023-01-27 23:10:16,381 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2522 transitions. [2023-01-27 23:10:16,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2522 transitions. [2023-01-27 23:10:16,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:16,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2522 transitions. [2023-01-27 23:10:16,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 114.63636363636364) internal successors, (2522), 22 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:16,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:16,387 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:16,387 INFO L175 Difference]: Start difference. First operand has 126 places, 218 transitions, 2810 flow. Second operand 22 states and 2522 transitions. [2023-01-27 23:10:16,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 334 transitions, 4559 flow [2023-01-27 23:10:16,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 334 transitions, 4319 flow, removed 106 selfloop flow, removed 6 redundant places. [2023-01-27 23:10:16,423 INFO L231 Difference]: Finished difference. Result has 148 places, 273 transitions, 3840 flow [2023-01-27 23:10:16,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3840, PETRI_PLACES=148, PETRI_TRANSITIONS=273} [2023-01-27 23:10:16,423 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-01-27 23:10:16,423 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 273 transitions, 3840 flow [2023-01-27 23:10:16,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:16,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:16,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:16,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 23:10:16,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 23:10:16,629 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:16,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:16,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1798676721, now seen corresponding path program 9 times [2023-01-27 23:10:16,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:16,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685602650] [2023-01-27 23:10:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:16,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:17,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685602650] [2023-01-27 23:10:17,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685602650] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593698664] [2023-01-27 23:10:17,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:10:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:17,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:10:17,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 23:10:17,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 23:10:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-27 23:10:17,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:17,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:10:17,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:10:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:10:18,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:10:18,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:18,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-01-27 23:10:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:18,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:18,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:18,491 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 371 treesize of output 215 [2023-01-27 23:10:18,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:18,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 998 treesize of output 1106 [2023-01-27 23:10:18,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:18,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 574 [2023-01-27 23:10:19,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:19,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 367 treesize of output 389 [2023-01-27 23:12:48,475 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 23:12:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:12:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593698664] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:12:48,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:12:48,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-27 23:12:48,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746232837] [2023-01-27 23:12:48,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:12:48,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 23:12:48,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:12:48,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 23:12:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=595, Unknown=2, NotChecked=0, Total=702 [2023-01-27 23:12:48,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-27 23:12:48,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 273 transitions, 3840 flow. Second operand has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:48,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:12:48,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-27 23:12:48,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:12:50,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:51,014 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) (.cse2 (select .cse1 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* .cse2 4) c_~f~0.offset)) (select .cse1 (+ c_~f~0.offset (* 4 .cse0)))) (<= c_~size~0 .cse0) (< .cse2 0) (<= c_~size~0 .cse2))))) (= c_~x1~0 c_~x2~0)) is different from false [2023-01-27 23:12:51,047 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~x1~0 4) c_~f~0.offset)) (.cse3 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496) c_~f~0.base))) (let ((.cse0 (select .cse2 .cse4)) (.cse1 (select .cse2 (+ c_~f~0.offset (* (select .cse2 .cse3) 4))))) (or (<= c_~size~0 .cse0) (< .cse1 0) (< .cse0 0) (= (select .cse2 (+ c_~f~0.offset (* .cse0 4))) (select .cse2 (+ c_~f~0.offset (* 4 .cse1)))) (<= c_~size~0 .cse1))))) (let ((.cse7 (select |c_#memory_int| c_~f~0.base))) (let ((.cse5 (select .cse7 (+ (* (select .cse7 .cse3) 4) c_~f~0.offset))) (.cse6 (select .cse7 .cse4))) (or (< .cse5 0) (<= c_~size~0 .cse5) (<= c_~size~0 .cse6) (< .cse6 0) (= (select .cse7 (+ c_~f~0.offset (* 4 .cse5))) (select .cse7 (+ c_~f~0.offset (* .cse6 4))))))))) is different from false [2023-01-27 23:12:53,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:55,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:58,952 INFO L130 PetriNetUnfolder]: 1936/3495 cut-off events. [2023-01-27 23:12:58,952 INFO L131 PetriNetUnfolder]: For 25450/25574 co-relation queries the response was YES. [2023-01-27 23:12:58,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21620 conditions, 3495 events. 1936/3495 cut-off events. For 25450/25574 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22342 event pairs, 338 based on Foata normal form. 116/3594 useless extension candidates. Maximal degree in co-relation 20626. Up to 2024 conditions per place. [2023-01-27 23:12:58,978 INFO L137 encePairwiseOnDemand]: 345/355 looper letters, 264 selfloop transitions, 226 changer transitions 2/498 dead transitions. [2023-01-27 23:12:58,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 498 transitions, 7367 flow [2023-01-27 23:12:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 23:12:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 23:12:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3242 transitions. [2023-01-27 23:12:58,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31491015055852356 [2023-01-27 23:12:58,981 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3242 transitions. [2023-01-27 23:12:58,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3242 transitions. [2023-01-27 23:12:58,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:12:58,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3242 transitions. [2023-01-27 23:12:58,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.79310344827586) internal successors, (3242), 29 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:58,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:58,990 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:58,990 INFO L175 Difference]: Start difference. First operand has 148 places, 273 transitions, 3840 flow. Second operand 29 states and 3242 transitions. [2023-01-27 23:12:58,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 498 transitions, 7367 flow [2023-01-27 23:12:59,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 498 transitions, 7001 flow, removed 159 selfloop flow, removed 6 redundant places. [2023-01-27 23:12:59,069 INFO L231 Difference]: Finished difference. Result has 177 places, 415 transitions, 6414 flow [2023-01-27 23:12:59,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6414, PETRI_PLACES=177, PETRI_TRANSITIONS=415} [2023-01-27 23:12:59,069 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-01-27 23:12:59,069 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 415 transitions, 6414 flow [2023-01-27 23:12:59,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:59,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:12:59,070 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:12:59,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 23:12:59,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:59,290 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:12:59,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:12:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1813313051, now seen corresponding path program 10 times [2023-01-27 23:12:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:12:59,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688251462] [2023-01-27 23:12:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:12:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:12:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:13:00,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:13:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688251462] [2023-01-27 23:13:00,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688251462] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:13:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679548917] [2023-01-27 23:13:00,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:13:00,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:13:00,254 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:13:00,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 23:13:00,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:13:00,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:13:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 23:13:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:13:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:13:00,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:13:00,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:13:00,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-27 23:13:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:13:00,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:13:00,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:13:00,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-01-27 23:13:00,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:13:00,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-01-27 23:13:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:01,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679548917] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:13:01,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:13:01,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-27 23:13:01,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247370240] [2023-01-27 23:13:01,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:13:01,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 23:13:01,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:13:01,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 23:13:01,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=478, Unknown=1, NotChecked=0, Total=552 [2023-01-27 23:13:01,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-27 23:13:01,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 415 transitions, 6414 flow. Second operand has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:01,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:13:01,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-27 23:13:01,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:13:06,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:13:06,795 INFO L130 PetriNetUnfolder]: 2206/3990 cut-off events. [2023-01-27 23:13:06,795 INFO L131 PetriNetUnfolder]: For 35542/35647 co-relation queries the response was YES. [2023-01-27 23:13:06,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27192 conditions, 3990 events. 2206/3990 cut-off events. For 35542/35647 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26283 event pairs, 353 based on Foata normal form. 95/4065 useless extension candidates. Maximal degree in co-relation 26110. Up to 2857 conditions per place. [2023-01-27 23:13:06,829 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 330 selfloop transitions, 175 changer transitions 2/513 dead transitions. [2023-01-27 23:13:06,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 513 transitions, 8626 flow [2023-01-27 23:13:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 23:13:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 23:13:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2344 transitions. [2023-01-27 23:13:06,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31441985244802145 [2023-01-27 23:13:06,832 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2344 transitions. [2023-01-27 23:13:06,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2344 transitions. [2023-01-27 23:13:06,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:13:06,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2344 transitions. [2023-01-27 23:13:06,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 111.61904761904762) internal successors, (2344), 21 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:06,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:06,838 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:06,838 INFO L175 Difference]: Start difference. First operand has 177 places, 415 transitions, 6414 flow. Second operand 21 states and 2344 transitions. [2023-01-27 23:13:06,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 513 transitions, 8626 flow [2023-01-27 23:13:06,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 513 transitions, 8181 flow, removed 195 selfloop flow, removed 10 redundant places. [2023-01-27 23:13:06,959 INFO L231 Difference]: Finished difference. Result has 192 places, 452 transitions, 7295 flow [2023-01-27 23:13:06,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=5995, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7295, PETRI_PLACES=192, PETRI_TRANSITIONS=452} [2023-01-27 23:13:06,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-01-27 23:13:06,959 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 452 transitions, 7295 flow [2023-01-27 23:13:06,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:06,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:13:06,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:13:06,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 23:13:07,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-01-27 23:13:07,164 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:13:07,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:13:07,165 INFO L85 PathProgramCache]: Analyzing trace with hash 107049777, now seen corresponding path program 11 times [2023-01-27 23:13:07,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:13:07,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791025110] [2023-01-27 23:13:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:13:07,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:13:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:13:08,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:13:08,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791025110] [2023-01-27 23:13:08,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791025110] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:13:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608521786] [2023-01-27 23:13:08,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:13:08,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:08,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:13:08,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:13:08,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 23:13:08,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:13:08,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:13:08,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 23:13:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:13:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:13:08,675 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 26 treesize of output 24 [2023-01-27 23:13:08,712 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:13:08,751 INFO L321 Elim1Store]: treesize reduction 86, result has 30.6 percent of original size [2023-01-27 23:13:08,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 64 [2023-01-27 23:13:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:13:08,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:13:09,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:13:09,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 218 [2023-01-27 23:13:09,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:13:09,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 56 [2023-01-27 23:13:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:09,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608521786] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:13:09,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:13:09,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-27 23:13:09,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968290542] [2023-01-27 23:13:09,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:13:09,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 23:13:09,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:13:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 23:13:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=486, Unknown=2, NotChecked=0, Total=552 [2023-01-27 23:13:09,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-27 23:13:09,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 452 transitions, 7295 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:09,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:13:09,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-27 23:13:09,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:13:12,021 INFO L130 PetriNetUnfolder]: 2834/5142 cut-off events. [2023-01-27 23:13:12,021 INFO L131 PetriNetUnfolder]: For 52510/52641 co-relation queries the response was YES. [2023-01-27 23:13:12,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35576 conditions, 5142 events. 2834/5142 cut-off events. For 52510/52641 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35300 event pairs, 492 based on Foata normal form. 120/5242 useless extension candidates. Maximal degree in co-relation 34547. Up to 3091 conditions per place. [2023-01-27 23:13:12,067 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 323 selfloop transitions, 279 changer transitions 3/611 dead transitions. [2023-01-27 23:13:12,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 611 transitions, 10865 flow [2023-01-27 23:13:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 23:13:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 23:13:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2249 transitions. [2023-01-27 23:13:12,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3167605633802817 [2023-01-27 23:13:12,070 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2249 transitions. [2023-01-27 23:13:12,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2249 transitions. [2023-01-27 23:13:12,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:13:12,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2249 transitions. [2023-01-27 23:13:12,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.45) internal successors, (2249), 20 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:12,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:12,075 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:12,075 INFO L175 Difference]: Start difference. First operand has 192 places, 452 transitions, 7295 flow. Second operand 20 states and 2249 transitions. [2023-01-27 23:13:12,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 611 transitions, 10865 flow [2023-01-27 23:13:12,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 611 transitions, 10509 flow, removed 125 selfloop flow, removed 10 redundant places. [2023-01-27 23:13:12,256 INFO L231 Difference]: Finished difference. Result has 209 places, 542 transitions, 9832 flow [2023-01-27 23:13:12,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9832, PETRI_PLACES=209, PETRI_TRANSITIONS=542} [2023-01-27 23:13:12,256 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 188 predicate places. [2023-01-27 23:13:12,257 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 542 transitions, 9832 flow [2023-01-27 23:13:12,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:12,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:13:12,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:13:12,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-27 23:13:12,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:12,461 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:13:12,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:13:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash -350264867, now seen corresponding path program 12 times [2023-01-27 23:13:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:13:12,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309104181] [2023-01-27 23:13:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:13:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:13:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:13:13,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:13:13,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309104181] [2023-01-27 23:13:13,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309104181] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:13:13,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600560591] [2023-01-27 23:13:13,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:13:13,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:13:13,654 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:13:13,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 23:13:13,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:13:13,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:13:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 23:13:13,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:13:13,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:13:13,998 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 20 treesize of output 20 [2023-01-27 23:13:14,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:13:14,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-27 23:13:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:13:14,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:13:16,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:13:16,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 224 [2023-01-27 23:13:16,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:13:16,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 88 [2023-01-27 23:13:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:16,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600560591] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:13:16,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:13:16,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-27 23:13:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464677640] [2023-01-27 23:13:16,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:13:16,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 23:13:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:13:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 23:13:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=480, Unknown=4, NotChecked=0, Total=552 [2023-01-27 23:13:16,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-27 23:13:16,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 542 transitions, 9832 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:16,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:13:16,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-27 23:13:16,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:13:22,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:13:25,773 INFO L130 PetriNetUnfolder]: 3585/6510 cut-off events. [2023-01-27 23:13:25,773 INFO L131 PetriNetUnfolder]: For 81821/81952 co-relation queries the response was YES. [2023-01-27 23:13:25,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47579 conditions, 6510 events. 3585/6510 cut-off events. For 81821/81952 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 46623 event pairs, 706 based on Foata normal form. 122/6605 useless extension candidates. Maximal degree in co-relation 46418. Up to 3766 conditions per place. [2023-01-27 23:13:25,832 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 369 selfloop transitions, 352 changer transitions 2/729 dead transitions. [2023-01-27 23:13:25,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 729 transitions, 14429 flow [2023-01-27 23:13:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 23:13:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 23:13:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2358 transitions. [2023-01-27 23:13:25,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31629778672032194 [2023-01-27 23:13:25,835 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2358 transitions. [2023-01-27 23:13:25,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2358 transitions. [2023-01-27 23:13:25,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:13:25,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2358 transitions. [2023-01-27 23:13:25,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 112.28571428571429) internal successors, (2358), 21 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:25,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:25,840 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:25,840 INFO L175 Difference]: Start difference. First operand has 209 places, 542 transitions, 9832 flow. Second operand 21 states and 2358 transitions. [2023-01-27 23:13:25,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 729 transitions, 14429 flow [2023-01-27 23:13:26,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 729 transitions, 13895 flow, removed 223 selfloop flow, removed 8 redundant places. [2023-01-27 23:13:26,127 INFO L231 Difference]: Finished difference. Result has 229 places, 659 transitions, 13144 flow [2023-01-27 23:13:26,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=9390, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13144, PETRI_PLACES=229, PETRI_TRANSITIONS=659} [2023-01-27 23:13:26,127 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 208 predicate places. [2023-01-27 23:13:26,128 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 659 transitions, 13144 flow [2023-01-27 23:13:26,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:26,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:13:26,128 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:13:26,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 23:13:26,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:26,335 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:13:26,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:13:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2040900387, now seen corresponding path program 13 times [2023-01-27 23:13:26,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:13:26,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352871685] [2023-01-27 23:13:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:13:26,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:13:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:26,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:13:26,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352871685] [2023-01-27 23:13:26,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352871685] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:13:26,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397623924] [2023-01-27 23:13:26,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:13:26,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:26,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:13:26,493 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:13:26,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 23:13:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:13:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:13:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:26,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:13:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:26,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397623924] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:13:26,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:13:26,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-27 23:13:26,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800384100] [2023-01-27 23:13:26,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:13:26,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 23:13:26,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:13:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 23:13:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-01-27 23:13:26,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:13:26,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 659 transitions, 13144 flow. Second operand has 15 states, 15 states have (on average 138.06666666666666) internal successors, (2071), 15 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:26,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:13:26,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:13:26,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:13:35,093 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 23:13:47,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:13:51,199 INFO L130 PetriNetUnfolder]: 8206/14966 cut-off events. [2023-01-27 23:13:51,199 INFO L131 PetriNetUnfolder]: For 198061/198061 co-relation queries the response was YES. [2023-01-27 23:13:51,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116605 conditions, 14966 events. 8206/14966 cut-off events. For 198061/198061 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 122412 event pairs, 1106 based on Foata normal form. 120/15086 useless extension candidates. Maximal degree in co-relation 115321. Up to 6706 conditions per place. [2023-01-27 23:13:51,435 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 875 selfloop transitions, 528 changer transitions 0/1403 dead transitions. [2023-01-27 23:13:51,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1403 transitions, 30653 flow [2023-01-27 23:13:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 23:13:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 23:13:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2592 transitions. [2023-01-27 23:13:51,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4056338028169014 [2023-01-27 23:13:51,438 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2592 transitions. [2023-01-27 23:13:51,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2592 transitions. [2023-01-27 23:13:51,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:13:51,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2592 transitions. [2023-01-27 23:13:51,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:51,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:51,444 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:51,444 INFO L175 Difference]: Start difference. First operand has 229 places, 659 transitions, 13144 flow. Second operand 18 states and 2592 transitions. [2023-01-27 23:13:51,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1403 transitions, 30653 flow [2023-01-27 23:13:52,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1403 transitions, 29176 flow, removed 661 selfloop flow, removed 9 redundant places. [2023-01-27 23:13:52,360 INFO L231 Difference]: Finished difference. Result has 247 places, 998 transitions, 22216 flow [2023-01-27 23:13:52,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=12535, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22216, PETRI_PLACES=247, PETRI_TRANSITIONS=998} [2023-01-27 23:13:52,361 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2023-01-27 23:13:52,361 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 998 transitions, 22216 flow [2023-01-27 23:13:52,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.06666666666666) internal successors, (2071), 15 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:52,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:13:52,361 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:13:52,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 23:13:52,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-27 23:13:52,566 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:13:52,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:13:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash 436220956, now seen corresponding path program 14 times [2023-01-27 23:13:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:13:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404240846] [2023-01-27 23:13:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:13:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:13:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:13:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:52,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:13:52,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404240846] [2023-01-27 23:13:52,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404240846] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:13:52,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042372777] [2023-01-27 23:13:52,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:13:52,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:13:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:13:52,723 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:13:52,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 23:13:52,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:13:52,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:13:52,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:13:52,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:13:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:53,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:13:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:13:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042372777] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:13:53,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:13:53,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-27 23:13:53,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666320380] [2023-01-27 23:13:53,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:13:53,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 23:13:53,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:13:53,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 23:13:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-01-27 23:13:53,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:13:53,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 998 transitions, 22216 flow. Second operand has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:53,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:13:53,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:13:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:13:58,392 INFO L130 PetriNetUnfolder]: 8298/15412 cut-off events. [2023-01-27 23:13:58,393 INFO L131 PetriNetUnfolder]: For 309281/309281 co-relation queries the response was YES. [2023-01-27 23:13:58,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130379 conditions, 15412 events. 8298/15412 cut-off events. For 309281/309281 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 130860 event pairs, 1349 based on Foata normal form. 136/15548 useless extension candidates. Maximal degree in co-relation 128849. Up to 6918 conditions per place. [2023-01-27 23:13:58,551 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1277 selfloop transitions, 365 changer transitions 50/1692 dead transitions. [2023-01-27 23:13:58,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1692 transitions, 41290 flow [2023-01-27 23:13:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 23:13:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 23:13:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2267 transitions. [2023-01-27 23:13:58,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39911971830985915 [2023-01-27 23:13:58,556 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2267 transitions. [2023-01-27 23:13:58,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2267 transitions. [2023-01-27 23:13:58,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:13:58,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2267 transitions. [2023-01-27 23:13:58,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 141.6875) internal successors, (2267), 16 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:58,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:58,560 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:58,560 INFO L175 Difference]: Start difference. First operand has 247 places, 998 transitions, 22216 flow. Second operand 16 states and 2267 transitions. [2023-01-27 23:13:58,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1692 transitions, 41290 flow [2023-01-27 23:13:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1692 transitions, 39547 flow, removed 744 selfloop flow, removed 4 redundant places. [2023-01-27 23:13:59,871 INFO L231 Difference]: Finished difference. Result has 264 places, 1175 transitions, 25963 flow [2023-01-27 23:13:59,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=20995, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25963, PETRI_PLACES=264, PETRI_TRANSITIONS=1175} [2023-01-27 23:13:59,872 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2023-01-27 23:13:59,872 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 1175 transitions, 25963 flow [2023-01-27 23:13:59,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:13:59,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:13:59,872 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:13:59,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-27 23:14:00,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:00,077 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:00,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1497674120, now seen corresponding path program 15 times [2023-01-27 23:14:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95813264] [2023-01-27 23:14:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95813264] [2023-01-27 23:14:00,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95813264] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194148478] [2023-01-27 23:14:00,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:14:00,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:00,269 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:14:00,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 23:14:00,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 23:14:00,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:14:00,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:14:00,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:00,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:00,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194148478] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:00,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:00,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-27 23:14:00,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011626596] [2023-01-27 23:14:00,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:00,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:14:00,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:00,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:14:00,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-01-27 23:14:00,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:14:00,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 1175 transitions, 25963 flow. Second operand has 20 states, 20 states have (on average 137.65) internal successors, (2753), 20 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:00,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:00,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:14:00,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:07,665 INFO L130 PetriNetUnfolder]: 8417/15612 cut-off events. [2023-01-27 23:14:07,666 INFO L131 PetriNetUnfolder]: For 329078/329078 co-relation queries the response was YES. [2023-01-27 23:14:07,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140970 conditions, 15612 events. 8417/15612 cut-off events. For 329078/329078 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 131628 event pairs, 3775 based on Foata normal form. 26/15638 useless extension candidates. Maximal degree in co-relation 139466. Up to 12144 conditions per place. [2023-01-27 23:14:07,835 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 929 selfloop transitions, 488 changer transitions 6/1423 dead transitions. [2023-01-27 23:14:07,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1423 transitions, 33564 flow [2023-01-27 23:14:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 23:14:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 23:14:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3552 transitions. [2023-01-27 23:14:07,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40022535211267607 [2023-01-27 23:14:07,839 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3552 transitions. [2023-01-27 23:14:07,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3552 transitions. [2023-01-27 23:14:07,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:07,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3552 transitions. [2023-01-27 23:14:07,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 142.08) internal successors, (3552), 25 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:07,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 355.0) internal successors, (9230), 26 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:07,846 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 355.0) internal successors, (9230), 26 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:07,846 INFO L175 Difference]: Start difference. First operand has 264 places, 1175 transitions, 25963 flow. Second operand 25 states and 3552 transitions. [2023-01-27 23:14:07,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1423 transitions, 33564 flow [2023-01-27 23:14:10,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1423 transitions, 32392 flow, removed 586 selfloop flow, removed 2 redundant places. [2023-01-27 23:14:10,448 INFO L231 Difference]: Finished difference. Result has 298 places, 1274 transitions, 28641 flow [2023-01-27 23:14:10,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=24969, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=28641, PETRI_PLACES=298, PETRI_TRANSITIONS=1274} [2023-01-27 23:14:10,450 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2023-01-27 23:14:10,450 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 1274 transitions, 28641 flow [2023-01-27 23:14:10,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 137.65) internal successors, (2753), 20 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:10,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:10,450 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:10,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-27 23:14:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:10,654 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:10,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2120764327, now seen corresponding path program 16 times [2023-01-27 23:14:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:10,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490410413] [2023-01-27 23:14:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:10,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:10,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:10,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490410413] [2023-01-27 23:14:10,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490410413] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:10,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121525224] [2023-01-27 23:14:10,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:14:10,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:10,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:10,791 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:14:10,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 23:14:10,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:14:10,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:14:10,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:14:10,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:10,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:11,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121525224] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:11,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:11,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-27 23:14:11,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83295919] [2023-01-27 23:14:11,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:11,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:14:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:14:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:14:11,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:14:11,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 1274 transitions, 28641 flow. Second operand has 18 states, 18 states have (on average 137.94444444444446) internal successors, (2483), 18 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:11,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:11,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:14:11,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:18,359 INFO L130 PetriNetUnfolder]: 8801/16281 cut-off events. [2023-01-27 23:14:18,359 INFO L131 PetriNetUnfolder]: For 372751/372751 co-relation queries the response was YES. [2023-01-27 23:14:18,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152666 conditions, 16281 events. 8801/16281 cut-off events. For 372751/372751 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 137530 event pairs, 1148 based on Foata normal form. 120/16401 useless extension candidates. Maximal degree in co-relation 151005. Up to 7252 conditions per place. [2023-01-27 23:14:18,554 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 986 selfloop transitions, 788 changer transitions 3/1777 dead transitions. [2023-01-27 23:14:18,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1777 transitions, 41341 flow [2023-01-27 23:14:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:14:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:14:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3302 transitions. [2023-01-27 23:14:18,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40440906307409674 [2023-01-27 23:14:18,563 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3302 transitions. [2023-01-27 23:14:18,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3302 transitions. [2023-01-27 23:14:18,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:18,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3302 transitions. [2023-01-27 23:14:18,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 143.56521739130434) internal successors, (3302), 23 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:18,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:18,569 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:18,569 INFO L175 Difference]: Start difference. First operand has 298 places, 1274 transitions, 28641 flow. Second operand 23 states and 3302 transitions. [2023-01-27 23:14:18,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1777 transitions, 41341 flow [2023-01-27 23:14:21,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1777 transitions, 39991 flow, removed 394 selfloop flow, removed 5 redundant places. [2023-01-27 23:14:21,737 INFO L231 Difference]: Finished difference. Result has 323 places, 1353 transitions, 30940 flow [2023-01-27 23:14:21,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=27291, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=709, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=30940, PETRI_PLACES=323, PETRI_TRANSITIONS=1353} [2023-01-27 23:14:21,739 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2023-01-27 23:14:21,739 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 1353 transitions, 30940 flow [2023-01-27 23:14:21,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.94444444444446) internal successors, (2483), 18 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:21,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:21,739 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:21,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 23:14:21,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:21,944 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:21,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash -759470750, now seen corresponding path program 17 times [2023-01-27 23:14:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:21,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702456360] [2023-01-27 23:14:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:21,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:22,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702456360] [2023-01-27 23:14:22,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702456360] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:22,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705061015] [2023-01-27 23:14:22,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:14:22,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:22,110 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:14:22,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 23:14:22,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:14:22,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:14:22,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:14:22,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:22,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:22,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705061015] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:22,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:22,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-27 23:14:22,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987582027] [2023-01-27 23:14:22,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:22,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:14:22,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:22,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:14:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-01-27 23:14:22,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:14:22,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 1353 transitions, 30940 flow. Second operand has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:22,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:22,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:14:22,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:25,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-27 23:14:35,901 INFO L130 PetriNetUnfolder]: 9363/19278 cut-off events. [2023-01-27 23:14:35,901 INFO L131 PetriNetUnfolder]: For 568457/568457 co-relation queries the response was YES. [2023-01-27 23:14:36,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187844 conditions, 19278 events. 9363/19278 cut-off events. For 568457/568457 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 188441 event pairs, 1527 based on Foata normal form. 58/19336 useless extension candidates. Maximal degree in co-relation 186111. Up to 8485 conditions per place. [2023-01-27 23:14:36,270 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1326 selfloop transitions, 886 changer transitions 14/2226 dead transitions. [2023-01-27 23:14:36,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 2226 transitions, 56800 flow [2023-01-27 23:14:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 23:14:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 23:14:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4940 transitions. [2023-01-27 23:14:36,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39758551307847084 [2023-01-27 23:14:36,274 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4940 transitions. [2023-01-27 23:14:36,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4940 transitions. [2023-01-27 23:14:36,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:36,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4940 transitions. [2023-01-27 23:14:36,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 141.14285714285714) internal successors, (4940), 35 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:36,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:36,283 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:36,283 INFO L175 Difference]: Start difference. First operand has 323 places, 1353 transitions, 30940 flow. Second operand 35 states and 4940 transitions. [2023-01-27 23:14:36,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 2226 transitions, 56800 flow [2023-01-27 23:14:40,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 2226 transitions, 55771 flow, removed 348 selfloop flow, removed 5 redundant places. [2023-01-27 23:14:40,853 INFO L231 Difference]: Finished difference. Result has 355 places, 1754 transitions, 43552 flow [2023-01-27 23:14:40,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=29625, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=43552, PETRI_PLACES=355, PETRI_TRANSITIONS=1754} [2023-01-27 23:14:40,855 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 334 predicate places. [2023-01-27 23:14:40,855 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1754 transitions, 43552 flow [2023-01-27 23:14:40,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:40,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:40,855 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:40,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 23:14:41,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 23:14:41,059 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:41,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 134782133, now seen corresponding path program 18 times [2023-01-27 23:14:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:41,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285408429] [2023-01-27 23:14:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:41,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:41,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285408429] [2023-01-27 23:14:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285408429] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346602940] [2023-01-27 23:14:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:14:41,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:41,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:41,175 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:14:41,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 23:14:41,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:14:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:14:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:14:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:41,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:14:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346602940] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:43,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:43,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-27 23:14:43,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813125959] [2023-01-27 23:14:43,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:43,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:14:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:14:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2023-01-27 23:14:43,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:14:43,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1754 transitions, 43552 flow. Second operand has 17 states, 17 states have (on average 137.94117647058823) internal successors, (2345), 17 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:43,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:43,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:14:43,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:13,456 WARN L222 SmtUtils]: Spent 15.44s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 23:15:32,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:15:34,222 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296)) (.cse1 (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296))) (and (forall ((~n~0 Int)) (let ((.cse0 (* 3 ~n~0))) (or (<= (mod .cse0 4294967296) .cse1) (<= (+ (* 4294967296 (div .cse0 4294967296)) 4) .cse0)))) (<= (div |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) .cse2) (forall ((~n~0 Int)) (let ((.cse3 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse3 4294967296)) 4) .cse3) (<= (mod .cse3 4294967296) (mod (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) 4294967296))))) (let ((.cse4 (* 3 c_~n~0))) (<= (+ (* (div .cse4 4294967296) 4294967296) |c_thread2Thread1of1ForFork1_~i~1#1| 1) (+ (* .cse2 4294967296) .cse4))) (forall ((~n~0 Int)) (let ((.cse5 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse5 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 4) (+ (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296)) .cse5)) (<= (mod .cse5 4294967296) .cse1)))) (forall ((~n~0 Int)) (let ((.cse6 (* 3 ~n~0))) (or (<= (mod .cse6 4294967296) (mod (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) 4294967296)) (<= (+ (* 4294967296 (div .cse6 4294967296)) 4) .cse6)))) (<= |c_thread2Thread1of1ForFork1_~i~1#1| |c_thread1Thread1of1ForFork0_~i~0#1|))) is different from false [2023-01-27 23:15:36,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:15:38,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:15:40,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:15:42,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:16:05,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:16:07,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:16:21,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:16:23,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:16:35,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:16:48,080 INFO L130 PetriNetUnfolder]: 10135/20735 cut-off events. [2023-01-27 23:16:48,081 INFO L131 PetriNetUnfolder]: For 698161/698161 co-relation queries the response was YES. [2023-01-27 23:16:48,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211094 conditions, 20735 events. 10135/20735 cut-off events. For 698161/698161 co-relation queries the response was YES. Maximal size of possible extension queue 1317. Compared 203096 event pairs, 1995 based on Foata normal form. 114/20849 useless extension candidates. Maximal degree in co-relation 208869. Up to 8958 conditions per place. [2023-01-27 23:16:48,385 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 1212 selfloop transitions, 1263 changer transitions 6/2481 dead transitions. [2023-01-27 23:16:48,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 2481 transitions, 62482 flow [2023-01-27 23:16:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-27 23:16:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-27 23:16:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6691 transitions. [2023-01-27 23:16:48,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40101887923284385 [2023-01-27 23:16:48,396 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6691 transitions. [2023-01-27 23:16:48,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6691 transitions. [2023-01-27 23:16:48,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:48,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6691 transitions. [2023-01-27 23:16:48,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 142.36170212765958) internal successors, (6691), 47 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:48,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 355.0) internal successors, (17040), 48 states have internal predecessors, (17040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:48,426 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 355.0) internal successors, (17040), 48 states have internal predecessors, (17040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:48,426 INFO L175 Difference]: Start difference. First operand has 355 places, 1754 transitions, 43552 flow. Second operand 47 states and 6691 transitions. [2023-01-27 23:16:48,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 2481 transitions, 62482 flow [2023-01-27 23:16:54,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 2481 transitions, 61034 flow, removed 365 selfloop flow, removed 15 redundant places. [2023-01-27 23:16:54,592 INFO L231 Difference]: Finished difference. Result has 400 places, 1921 transitions, 49869 flow [2023-01-27 23:16:54,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=42276, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=49869, PETRI_PLACES=400, PETRI_TRANSITIONS=1921} [2023-01-27 23:16:54,598 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 379 predicate places. [2023-01-27 23:16:54,598 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1921 transitions, 49869 flow [2023-01-27 23:16:54,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.94117647058823) internal successors, (2345), 17 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:54,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:54,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:54,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:54,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 23:16:54,803 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:54,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2023740468, now seen corresponding path program 19 times [2023-01-27 23:16:54,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:54,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114715233] [2023-01-27 23:16:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:54,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:54,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:54,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114715233] [2023-01-27 23:16:54,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114715233] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:54,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615594268] [2023-01-27 23:16:54,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:16:54,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:54,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:54,951 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:54,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 23:16:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:16:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:55,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:55,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615594268] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:55,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:55,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-27 23:16:55,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031130451] [2023-01-27 23:16:55,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:55,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:16:55,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:16:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-01-27 23:16:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:16:55,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1921 transitions, 49869 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:55,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:55,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:16:55,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:58,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:00,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:05,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:07,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:12,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:19,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:22,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:25,923 INFO L130 PetriNetUnfolder]: 10892/22322 cut-off events. [2023-01-27 23:17:25,924 INFO L131 PetriNetUnfolder]: For 977381/977381 co-relation queries the response was YES. [2023-01-27 23:17:26,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247665 conditions, 22322 events. 10892/22322 cut-off events. For 977381/977381 co-relation queries the response was YES. Maximal size of possible extension queue 1420. Compared 222041 event pairs, 4932 based on Foata normal form. 56/22378 useless extension candidates. Maximal degree in co-relation 245286. Up to 19886 conditions per place. [2023-01-27 23:17:26,304 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1800 selfloop transitions, 512 changer transitions 3/2315 dead transitions. [2023-01-27 23:17:26,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 2315 transitions, 63918 flow [2023-01-27 23:17:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 23:17:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 23:17:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4543 transitions. [2023-01-27 23:17:26,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3999119718309859 [2023-01-27 23:17:26,309 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4543 transitions. [2023-01-27 23:17:26,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4543 transitions. [2023-01-27 23:17:26,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:17:26,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4543 transitions. [2023-01-27 23:17:26,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 141.96875) internal successors, (4543), 32 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:26,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 355.0) internal successors, (11715), 33 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:26,344 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 355.0) internal successors, (11715), 33 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:26,344 INFO L175 Difference]: Start difference. First operand has 400 places, 1921 transitions, 49869 flow. Second operand 32 states and 4543 transitions. [2023-01-27 23:17:26,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 2315 transitions, 63918 flow [2023-01-27 23:17:33,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 2315 transitions, 60733 flow, removed 466 selfloop flow, removed 26 redundant places. [2023-01-27 23:17:33,651 INFO L231 Difference]: Finished difference. Result has 428 places, 2158 transitions, 55342 flow [2023-01-27 23:17:33,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=47010, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=55342, PETRI_PLACES=428, PETRI_TRANSITIONS=2158} [2023-01-27 23:17:33,652 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 407 predicate places. [2023-01-27 23:17:33,652 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 2158 transitions, 55342 flow [2023-01-27 23:17:33,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:33,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:17:33,653 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:17:33,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-01-27 23:17:33,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 23:17:33,855 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:17:33,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:17:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1131740359, now seen corresponding path program 20 times [2023-01-27 23:17:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:17:33,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994857574] [2023-01-27 23:17:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:17:33,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:17:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:17:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:17:34,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:17:34,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994857574] [2023-01-27 23:17:34,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994857574] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:17:34,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298158213] [2023-01-27 23:17:34,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:17:34,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:17:34,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:17:34,013 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:17:34,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 23:17:34,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:17:34,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:17:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:17:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:17:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:17:34,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:17:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:17:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298158213] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:17:34,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:17:34,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-27 23:17:34,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952141635] [2023-01-27 23:17:34,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:17:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 23:17:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:17:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 23:17:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-01-27 23:17:34,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:17:34,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 2158 transitions, 55342 flow. Second operand has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:34,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:17:34,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:17:34,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:17:41,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:51,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:55,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:17:57,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:12,673 INFO L130 PetriNetUnfolder]: 11460/23371 cut-off events. [2023-01-27 23:18:12,673 INFO L131 PetriNetUnfolder]: For 1277391/1277391 co-relation queries the response was YES. [2023-01-27 23:18:12,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276433 conditions, 23371 events. 11460/23371 cut-off events. For 1277391/1277391 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 233539 event pairs, 3481 based on Foata normal form. 108/23479 useless extension candidates. Maximal degree in co-relation 274038. Up to 10132 conditions per place. [2023-01-27 23:18:13,220 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1414 selfloop transitions, 1192 changer transitions 6/2612 dead transitions. [2023-01-27 23:18:13,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 2612 transitions, 70254 flow [2023-01-27 23:18:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 23:18:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 23:18:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4003 transitions. [2023-01-27 23:18:13,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027162977867203 [2023-01-27 23:18:13,223 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4003 transitions. [2023-01-27 23:18:13,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4003 transitions. [2023-01-27 23:18:13,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:18:13,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4003 transitions. [2023-01-27 23:18:13,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 142.96428571428572) internal successors, (4003), 28 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:13,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:13,230 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:13,230 INFO L175 Difference]: Start difference. First operand has 428 places, 2158 transitions, 55342 flow. Second operand 28 states and 4003 transitions. [2023-01-27 23:18:13,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 2612 transitions, 70254 flow [2023-01-27 23:18:23,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 2612 transitions, 68551 flow, removed 785 selfloop flow, removed 6 redundant places. [2023-01-27 23:18:23,849 INFO L231 Difference]: Finished difference. Result has 462 places, 2257 transitions, 59729 flow [2023-01-27 23:18:23,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=53663, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=59729, PETRI_PLACES=462, PETRI_TRANSITIONS=2257} [2023-01-27 23:18:23,851 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 441 predicate places. [2023-01-27 23:18:23,851 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 2257 transitions, 59729 flow [2023-01-27 23:18:23,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:23,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:18:23,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:18:23,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 23:18:24,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:18:24,057 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:18:24,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:18:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash 542179494, now seen corresponding path program 21 times [2023-01-27 23:18:24,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:18:24,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600157484] [2023-01-27 23:18:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:18:24,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:18:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:18:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:24,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:18:24,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600157484] [2023-01-27 23:18:24,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600157484] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:18:24,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247591997] [2023-01-27 23:18:24,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:18:24,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:18:24,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:18:24,201 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:18:24,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 23:18:24,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 23:18:24,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:18:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:18:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:18:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:24,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:18:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:24,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247591997] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:18:24,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:18:24,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-27 23:18:24,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392454665] [2023-01-27 23:18:24,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:18:24,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:18:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:18:24,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:18:24,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-27 23:18:24,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:18:24,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 2257 transitions, 59729 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:24,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:18:24,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:18:24,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:18:28,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:44,685 INFO L130 PetriNetUnfolder]: 11522/23450 cut-off events. [2023-01-27 23:18:44,685 INFO L131 PetriNetUnfolder]: For 1487214/1487214 co-relation queries the response was YES. [2023-01-27 23:18:44,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290844 conditions, 23450 events. 11522/23450 cut-off events. For 1487214/1487214 co-relation queries the response was YES. Maximal size of possible extension queue 1510. Compared 233426 event pairs, 5332 based on Foata normal form. 56/23506 useless extension candidates. Maximal degree in co-relation 288401. Up to 21810 conditions per place. [2023-01-27 23:18:45,185 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1954 selfloop transitions, 466 changer transitions 2/2422 dead transitions. [2023-01-27 23:18:45,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 2422 transitions, 68853 flow [2023-01-27 23:18:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 23:18:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 23:18:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5194 transitions. [2023-01-27 23:18:45,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39543205177007995 [2023-01-27 23:18:45,189 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5194 transitions. [2023-01-27 23:18:45,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5194 transitions. [2023-01-27 23:18:45,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:18:45,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5194 transitions. [2023-01-27 23:18:45,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 140.3783783783784) internal successors, (5194), 37 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:45,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 355.0) internal successors, (13490), 38 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:45,197 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 355.0) internal successors, (13490), 38 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:45,197 INFO L175 Difference]: Start difference. First operand has 462 places, 2257 transitions, 59729 flow. Second operand 37 states and 5194 transitions. [2023-01-27 23:18:45,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 2422 transitions, 68853 flow [2023-01-27 23:18:56,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 2422 transitions, 67602 flow, removed 342 selfloop flow, removed 10 redundant places. [2023-01-27 23:18:56,855 INFO L231 Difference]: Finished difference. Result has 500 places, 2311 transitions, 61413 flow [2023-01-27 23:18:56,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=58459, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=61413, PETRI_PLACES=500, PETRI_TRANSITIONS=2311} [2023-01-27 23:18:56,856 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 479 predicate places. [2023-01-27 23:18:56,856 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 2311 transitions, 61413 flow [2023-01-27 23:18:56,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:56,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:18:56,857 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:18:56,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-27 23:18:57,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:18:57,062 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:18:57,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:18:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1052433547, now seen corresponding path program 22 times [2023-01-27 23:18:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:18:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520810281] [2023-01-27 23:18:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:18:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:18:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:18:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:57,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:18:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520810281] [2023-01-27 23:18:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520810281] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:18:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349754915] [2023-01-27 23:18:57,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:18:57,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:18:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:18:57,287 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:18:57,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 23:18:57,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:18:57,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:18:57,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:18:57,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:18:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:57,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:18:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:57,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349754915] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:18:57,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:18:57,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-27 23:18:57,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927722009] [2023-01-27 23:18:57,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:18:57,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:18:57,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:18:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:18:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-01-27 23:18:57,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:18:57,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 2311 transitions, 61413 flow. Second operand has 19 states, 19 states have (on average 137.89473684210526) internal successors, (2620), 19 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:57,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:18:57,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:18:57,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:19:17,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:19:24,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:19:27,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:19:38,568 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) 4294967296))) (and (let ((.cse0 (* 3 c_~n~0))) (<= (+ (* (div .cse0 4294967296) 4294967296) |c_thread2Thread1of1ForFork1_~i~1#1| 1) .cse0)) (forall ((~n~0 Int)) (let ((.cse1 (mod (* 3 ~n~0) 4294967296))) (or (< 3 .cse1) (<= .cse1 .cse2)))) (< 0 (+ (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) 1)) (<= (+ |c_thread2Thread1of1ForFork1_~i~1#1| (* (div |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) 4294967296)) |c_thread1Thread1of1ForFork0_~i~0#1|) (forall ((~n~0 Int)) (let ((.cse3 (mod (* 3 ~n~0) 4294967296))) (or (< (mod (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296) .cse3) (<= .cse3 .cse2)))) (forall ((~n~0 Int)) (let ((.cse4 (mod (* 3 ~n~0) 4294967296))) (or (< (mod |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) .cse4) (<= .cse4 .cse2)))))) is different from false [2023-01-27 23:19:50,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:20:04,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:20:06,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:20:17,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:20:22,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:20:29,578 INFO L130 PetriNetUnfolder]: 12243/24913 cut-off events. [2023-01-27 23:20:29,579 INFO L131 PetriNetUnfolder]: For 1907620/1907620 co-relation queries the response was YES. [2023-01-27 23:20:29,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324913 conditions, 24913 events. 12243/24913 cut-off events. For 1907620/1907620 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 251311 event pairs, 3457 based on Foata normal form. 156/25069 useless extension candidates. Maximal degree in co-relation 322341. Up to 10903 conditions per place. [2023-01-27 23:20:30,015 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 1406 selfloop transitions, 1435 changer transitions 12/2853 dead transitions. [2023-01-27 23:20:30,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 2853 transitions, 79067 flow [2023-01-27 23:20:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 23:20:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 23:20:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5706 transitions. [2023-01-27 23:20:30,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40183098591549293 [2023-01-27 23:20:30,047 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5706 transitions. [2023-01-27 23:20:30,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5706 transitions. [2023-01-27 23:20:30,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:20:30,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5706 transitions. [2023-01-27 23:20:30,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 142.65) internal successors, (5706), 40 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:20:30,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 355.0) internal successors, (14555), 41 states have internal predecessors, (14555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:20:30,055 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 355.0) internal successors, (14555), 41 states have internal predecessors, (14555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:20:30,055 INFO L175 Difference]: Start difference. First operand has 500 places, 2311 transitions, 61413 flow. Second operand 40 states and 5706 transitions. [2023-01-27 23:20:30,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 2853 transitions, 79067 flow [2023-01-27 23:20:45,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 2853 transitions, 78228 flow, removed 320 selfloop flow, removed 10 redundant places. [2023-01-27 23:20:45,222 INFO L231 Difference]: Finished difference. Result has 543 places, 2463 transitions, 68925 flow [2023-01-27 23:20:45,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=60263, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=947, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=68925, PETRI_PLACES=543, PETRI_TRANSITIONS=2463} [2023-01-27 23:20:45,224 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 522 predicate places. [2023-01-27 23:20:45,224 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 2463 transitions, 68925 flow [2023-01-27 23:20:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.89473684210526) internal successors, (2620), 19 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:20:45,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:20:45,225 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:20:45,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 23:20:45,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-27 23:20:45,425 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:20:45,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:20:45,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1706577945, now seen corresponding path program 23 times [2023-01-27 23:20:45,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:20:45,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356474820] [2023-01-27 23:20:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:20:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:20:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:20:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:20:45,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:20:45,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356474820] [2023-01-27 23:20:45,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356474820] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:20:45,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291823206] [2023-01-27 23:20:45,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:20:45,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:20:45,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:20:45,611 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:20:45,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 23:20:45,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:20:45,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:20:45,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 23:20:45,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:20:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:20:45,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:20:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:20:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291823206] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:20:46,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:20:46,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-01-27 23:20:46,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737364592] [2023-01-27 23:20:46,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:20:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 23:20:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:20:46,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 23:20:46,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-01-27 23:20:46,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:20:46,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 2463 transitions, 68925 flow. Second operand has 21 states, 21 states have (on average 137.66666666666666) internal successors, (2891), 21 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:20:46,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:20:46,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:20:46,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:21:06,060 INFO L130 PetriNetUnfolder]: 12179/24745 cut-off events. [2023-01-27 23:21:06,060 INFO L131 PetriNetUnfolder]: For 2464385/2464385 co-relation queries the response was YES. [2023-01-27 23:21:06,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354199 conditions, 24745 events. 12179/24745 cut-off events. For 2464385/2464385 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 251450 event pairs, 219 based on Foata normal form. 38/24783 useless extension candidates. Maximal degree in co-relation 351562. Up to 12969 conditions per place. [2023-01-27 23:21:06,688 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1983 selfloop transitions, 1007 changer transitions 20/3010 dead transitions. [2023-01-27 23:21:06,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 3010 transitions, 86646 flow [2023-01-27 23:21:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:21:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:21:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3242 transitions. [2023-01-27 23:21:06,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970606246172688 [2023-01-27 23:21:06,691 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3242 transitions. [2023-01-27 23:21:06,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3242 transitions. [2023-01-27 23:21:06,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:21:06,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3242 transitions. [2023-01-27 23:21:06,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 140.95652173913044) internal successors, (3242), 23 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:21:06,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:21:06,696 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:21:06,697 INFO L175 Difference]: Start difference. First operand has 543 places, 2463 transitions, 68925 flow. Second operand 23 states and 3242 transitions. [2023-01-27 23:21:06,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 3010 transitions, 86646 flow [2023-01-27 23:21:29,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 3010 transitions, 84340 flow, removed 621 selfloop flow, removed 21 redundant places. [2023-01-27 23:21:29,673 INFO L231 Difference]: Finished difference. Result has 549 places, 2730 transitions, 75344 flow [2023-01-27 23:21:29,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=67051, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=75344, PETRI_PLACES=549, PETRI_TRANSITIONS=2730} [2023-01-27 23:21:29,675 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 528 predicate places. [2023-01-27 23:21:29,675 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 2730 transitions, 75344 flow [2023-01-27 23:21:29,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.66666666666666) internal successors, (2891), 21 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:21:29,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:21:29,676 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:21:29,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-27 23:21:29,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-27 23:21:29,881 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:21:29,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:21:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash -297666364, now seen corresponding path program 24 times [2023-01-27 23:21:29,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:21:29,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797979906] [2023-01-27 23:21:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:21:29,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:21:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:21:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:21:30,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:21:30,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797979906] [2023-01-27 23:21:30,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797979906] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:21:30,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51536202] [2023-01-27 23:21:30,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:21:30,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:21:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:21:30,017 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:21:30,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 23:21:30,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:21:30,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:21:30,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:21:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:21:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:21:30,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:21:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:21:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51536202] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:21:30,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:21:30,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-27 23:21:30,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583386863] [2023-01-27 23:21:30,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:21:30,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:21:30,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:21:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:21:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-27 23:21:30,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:21:30,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 2730 transitions, 75344 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:21:30,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:21:30,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:21:30,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:21:53,627 INFO L130 PetriNetUnfolder]: 12056/24495 cut-off events. [2023-01-27 23:21:53,628 INFO L131 PetriNetUnfolder]: For 2452933/2452933 co-relation queries the response was YES. [2023-01-27 23:21:53,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354599 conditions, 24495 events. 12056/24495 cut-off events. For 2452933/2452933 co-relation queries the response was YES. Maximal size of possible extension queue 1619. Compared 246823 event pairs, 1990 based on Foata normal form. 76/24571 useless extension candidates. Maximal degree in co-relation 351989. Up to 11445 conditions per place. [2023-01-27 23:21:54,084 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 2155 selfloop transitions, 1000 changer transitions 9/3164 dead transitions. [2023-01-27 23:21:54,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 3164 transitions, 94520 flow [2023-01-27 23:21:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 23:21:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 23:21:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5897 transitions. [2023-01-27 23:21:54,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39550637156270957 [2023-01-27 23:21:54,088 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5897 transitions. [2023-01-27 23:21:54,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5897 transitions. [2023-01-27 23:21:54,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:21:54,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5897 transitions. [2023-01-27 23:21:54,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 140.4047619047619) internal successors, (5897), 42 states have internal predecessors, (5897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:21:54,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:21:54,097 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:21:54,097 INFO L175 Difference]: Start difference. First operand has 549 places, 2730 transitions, 75344 flow. Second operand 42 states and 5897 transitions. [2023-01-27 23:21:54,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 3164 transitions, 94520 flow [2023-01-27 23:22:21,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 3164 transitions, 92829 flow, removed 564 selfloop flow, removed 9 redundant places. [2023-01-27 23:22:21,066 INFO L231 Difference]: Finished difference. Result has 584 places, 2763 transitions, 78087 flow [2023-01-27 23:22:21,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=73358, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=955, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=78087, PETRI_PLACES=584, PETRI_TRANSITIONS=2763} [2023-01-27 23:22:21,068 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 563 predicate places. [2023-01-27 23:22:21,068 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 2763 transitions, 78087 flow [2023-01-27 23:22:21,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:22:21,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:22:21,069 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:22:21,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-27 23:22:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:22:21,274 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:22:21,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:22:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash 535537283, now seen corresponding path program 25 times [2023-01-27 23:22:21,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:22:21,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222010125] [2023-01-27 23:22:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:22:21,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:22:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:22:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:22:21,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:22:21,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222010125] [2023-01-27 23:22:21,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222010125] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:22:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530918965] [2023-01-27 23:22:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:22:21,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:22:21,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:22:21,414 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:22:21,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 23:22:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:22:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:22:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:22:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:22:21,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:22:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:22:21,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530918965] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:22:21,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:22:21,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-27 23:22:21,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281060428] [2023-01-27 23:22:21,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:22:21,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:22:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:22:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:22:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-01-27 23:22:21,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-27 23:22:21,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 2763 transitions, 78087 flow. Second operand has 19 states, 19 states have (on average 138.10526315789474) internal successors, (2624), 19 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:22:21,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:22:21,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-27 23:22:21,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:23:25,959 INFO L130 PetriNetUnfolder]: 12489/25280 cut-off events. [2023-01-27 23:23:25,959 INFO L131 PetriNetUnfolder]: For 2496640/2496640 co-relation queries the response was YES. [2023-01-27 23:23:26,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360082 conditions, 25280 events. 12489/25280 cut-off events. For 2496640/2496640 co-relation queries the response was YES. Maximal size of possible extension queue 1688. Compared 254317 event pairs, 3386 based on Foata normal form. 42/25322 useless extension candidates. Maximal degree in co-relation 358152. Up to 10679 conditions per place. [2023-01-27 23:23:26,588 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1510 selfloop transitions, 1738 changer transitions 0/3248 dead transitions. [2023-01-27 23:23:26,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 3248 transitions, 95119 flow [2023-01-27 23:23:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 23:23:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 23:23:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5965 transitions. [2023-01-27 23:23:26,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000670690811536 [2023-01-27 23:23:26,592 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5965 transitions. [2023-01-27 23:23:26,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5965 transitions. [2023-01-27 23:23:26,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:23:26,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5965 transitions. [2023-01-27 23:23:26,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 142.02380952380952) internal successors, (5965), 42 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:26,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:26,603 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:26,604 INFO L175 Difference]: Start difference. First operand has 584 places, 2763 transitions, 78087 flow. Second operand 42 states and 5965 transitions. [2023-01-27 23:23:26,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 3248 transitions, 95119 flow Received shutdown request... [2023-01-27 23:23:46,691 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:23:46,693 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 23:23:46,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 23:23:46,724 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:23:46,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:46,899 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-27 23:23:46,900 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 23:23:46,900 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 23:23:46,900 INFO L445 BasicCegarLoop]: Path program histogram: [25, 5, 3, 1, 1] [2023-01-27 23:23:46,914 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:23:46,914 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:23:46,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:23:46 BasicIcfg [2023-01-27 23:23:46,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:23:46,916 INFO L158 Benchmark]: Toolchain (without parser) took 840676.88ms. Allocated memory was 555.7MB in the beginning and 6.6GB in the end (delta: 6.0GB). Free memory was 507.8MB in the beginning and 3.1GB in the end (delta: -2.6GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2023-01-27 23:23:46,916 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 341.8MB. Free memory is still 292.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:23:46,916 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.89ms. Allocated memory is still 555.7MB. Free memory was 507.4MB in the beginning and 496.1MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 23:23:46,917 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.09ms. Allocated memory is still 555.7MB. Free memory was 496.1MB in the beginning and 494.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:23:46,917 INFO L158 Benchmark]: Boogie Preprocessor took 18.24ms. Allocated memory is still 555.7MB. Free memory was 494.0MB in the beginning and 492.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:23:46,917 INFO L158 Benchmark]: RCFGBuilder took 422.44ms. Allocated memory is still 555.7MB. Free memory was 492.7MB in the beginning and 475.5MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-27 23:23:46,917 INFO L158 Benchmark]: TraceAbstraction took 839968.10ms. Allocated memory was 555.7MB in the beginning and 6.6GB in the end (delta: 6.0GB). Free memory was 475.0MB in the beginning and 3.1GB in the end (delta: -2.6GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2023-01-27 23:23:46,917 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 341.8MB. Free memory is still 292.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 203.89ms. Allocated memory is still 555.7MB. Free memory was 507.4MB in the beginning and 496.1MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 58.09ms. Allocated memory is still 555.7MB. Free memory was 496.1MB in the beginning and 494.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.24ms. Allocated memory is still 555.7MB. Free memory was 494.0MB in the beginning and 492.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 422.44ms. Allocated memory is still 555.7MB. Free memory was 492.7MB in the beginning and 475.5MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 839968.10ms. Allocated memory was 555.7MB in the beginning and 6.6GB in the end (delta: 6.0GB). Free memory was 475.0MB in the beginning and 3.1GB in the end (delta: -2.6GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 152 PlacesBefore, 21 PlacesAfterwards, 160 TransitionsBefore, 17 TransitionsAfterwards, 2592 CoEnabledTransitionPairs, 7 FixpointIterations, 72 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 24 ConcurrentYvCompositions, 12 ChoiceCompositions, 185 TotalNumberOfCompositions, 2630 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2598, independent: 2589, independent conditional: 0, independent unconditional: 2589, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1564, independent: 1559, independent conditional: 0, independent unconditional: 1559, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2598, independent: 1030, independent conditional: 0, independent unconditional: 1030, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 1564, unknown conditional: 0, unknown unconditional: 1564] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 216 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 839.8s, OverallIterations: 35, TraceHistogramMax: 4, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 645.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 275 mSolverCounterUnknown, 4092 SdHoareTripleChecker+Valid, 107.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4092 mSDsluCounter, 463 SdHoareTripleChecker+Invalid, 105.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 430 IncrementalHoareTripleChecker+Unchecked, 353 mSDsCounter, 456 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18573 IncrementalHoareTripleChecker+Invalid, 19734 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 456 mSolverCounterUnsat, 110 mSDtfsCounter, 18573 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1921 GetRequests, 1003 SyntacticMatches, 30 SemanticMatches, 888 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 6474 ImplicationChecksByTransitivity, 244.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78087occurred in iteration=34, InterpolantAutomatonStates: 659, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 180.0s InterpolantComputationTime, 1219 NumberOfCodeBlocks, 1206 NumberOfCodeBlocksAsserted, 98 NumberOfCheckSat, 1683 ConstructedInterpolants, 101 QuantifiedInterpolants, 22640 SizeOfPredicates, 190 NumberOfNonLiveVariables, 5720 ConjunctsInSsa, 598 ConjunctsInUnsatCore, 91 InterpolantComputations, 8 PerfectInterpolantSequences, 241/857 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown